| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
(Hypertension. 1998;32:965-971.)
© 1998 American Heart Association, Inc.
Scientific Contributions |
From the Departments of Medicine and Pharmacology (N.J.B., M.A.A., D.E.V.), Vanderbilt University Medical Center, and the Veterans Affairs Medical Center (D.E.V.), Nashville, Tenn; and the Department of Medicine (G.H.W., W.R.L.), Brigham and Women's Hospital, Boston, Mass.
| Abstract |
|---|
|
|
|---|
Key Words: renin angiotensin II plasminogen activator inhibitor 1 fibrinolysis tissue plasminogen activator sodium quinapril
| Introduction |
|---|
|
|
|---|
The mechanisms through which activation of the RAS increases or ACE inhibition reduces the risk of ischemic cardiovascular events in selected populations are not known. One possible explanation involves an interaction between the RAS and fibrinolytic system. Accumulating data suggest that angiotensin II (Ang II) modulates fibrinolysis. For example, Ang II and its hexapeptide metabolite Ang IV stimulate plasminogen activator inhibitor-1 (PAI-1) expression in cultured endothelial cells in a dose-dependent manner.9 Infusion of exogenous Ang II has been shown to increase PAI-1 antigen selectively in both normotensive and hypertensive subjects.10 These findings may be of clinical significance because PAI-1 is the major inhibitor of tissue plasminogen activator (tPA) in vivo.11 Increased PAI-1 expression has been observed in atherosclerotic plaques in humans12 and may contribute to the progression of vascular disease. Elevated PAI-1 levels are observed in insulin-resistant states13 and appear to be a risk factor for recurrent MI.14
ACE inhibitors not only block the formation of Ang II but also prevent the degradation of bradykinin.15 16 We have previously proposed that the prothrombotic effects of Ang II may be balanced by the antithrombotic effects of bradykinin.17 Bradykinin is a potent stimulus for tPA secretion in ACE-pretreated bovine aorta endothelial cells, in animal models, and in humans.17 18 19 Thus, ACE inhibitors would be expected to favorably alter fibrinolytic balance by decreasing Ang II and increasing bradykinin.
The purpose of the present study was to test the hypothesis that activation of the RAS increases PAI-1 and that ACE inhibition blocks this effect and favorably alters fibrinolytic balance. Salt depletion was used to stimulate the RAS. Fibrinolytic and RAS parameters were measured throughout the day because of the known diurnal variation in these 2 systems.
| Methods |
|---|
|
|
|---|
|
Four days after completion of the second diet period, subjects were treated with quinapril at an initial dose of 5 mg PO BID. The dose was increased every 3 days through 10, 20, and 40 mg PO BID. After titration, subjects were maintained on the 40-mg BID dose of quinapril for an additional 14 days. They were then provided a 10-mmol sodium diet for the last 5 days of quinapril treatment. On the 5th day of the diet, blood sampling and urine collection were repeated. One subject completed the quinapril phase of the study before the diet phase.
Laboratory Analysis
Blood samples were collected on ice and centrifuged
immediately at 0°C for 20 minutes. All plasma or serum was separated
and stored at -70°C until the time of assay. Blood for measurement
of PAI-1 and tPA was collected in standard evacuated tubes containing
0.105 mol/L sodium citrate (Becton Dickinson). PAI-1 activity
levels were measured using an assay based on the methods of Verheijen
et al,20 with standardized commercial kits
(Biopool Inc.), with results expressed as units per milliliter. Antigen
levels were determined using a 2-site enzyme-linked immunosorbent assay
(Biopool AB) as previously described.21 In our
laboratory, the coefficients of variation for repeated measures of tPA
antigen and PAI-1 antigen are 5.9% and 8.1%, respectively. The PAI-1
and tPA mass ratio was determined by dividing plasma concentrations
(ng/mL) by the molecular weights of the 2 proteins, with a value of
70 000 g/mol used for tPA, and a value of 50 000 g/mol for PAI-1.
Blood for measurement of PRA was collected in tubes containing EDTA.
PRA was measured in samples drawn from 8 AM through 8
PM by radioimmunoassay for Ang I formation at pH 7.4 and
37°C.22 Serum aldosterone and
cortisol levels were assayed using commercially available
radioimmunoassay kits. For aldosterone
(Diagnostic Corp) the intra-assay and interassay
coefficients of variation were 6% and 10%, respectively. For cortisol
(Incstar Corp), the intra-assay and interassay coefficients of
variation were 4.5% and 6.7%, respectively.
Catecholamines were collected in tubes containing reduced
glutathione and measured by high-performance liquid
chromatography, as previously
described.23 Plasma samples from blood collected
at 8 AM, 11 AM, 11:30 AM, and
11 PM were assayed for catecholamines.
Statistical Analysis
Data are presented as mean±SEM (Figures 2
, 3
and
4). To examine the effect of diurnal
variation, the day was divided into 3 periods: period 1 (8
AM through 2 PM), period 2 (5 PM
through 11 PM), and period 3 (2 AM through 8
AM). (Mean values for samples drawn during each of these
periods are presented in Table 2
.) Data were analyzed
using repeated-measures ANOVA (SPSS for Windows, Release 6, SPSS) in
which the between-subject variable was renin status (upright PRA
<2.4 versus
2.4 ng Ang I/mL per hour during salt depletion), and the
within-subject variables were time of day (with repeated samples
within each time of day), salt intake (low versus high salt), and drug
(ACE inhibition versus control). When analysis showed an effect
of time of day, a separate ANOVA was repeated for each of the 3 time
periods. Post hoc comparisons were made using a paired t
test. A 2-tailed value of P<0.05 was the criterion for
statistical significance.
|
|
|
| Results |
|---|
|
|
|---|
|
Hemodynamic Response
There was no effect of salt intake or ACE inhibition on blood
pressure in these normotensive subjects (Table 1
). Heart rate was
significantly lower during ACE inhibition than during low salt intake
alone.
Endocrine Response
There was no difference in PRA measured from 8 AM
through 2 PM and PRA measured from 5 PM through
8 PM (Table 2
). Low sodium
intake was associated with significantly higher PRA compared with high
sodium intake (F=17.4, P=0.003; Figure 2A
). This was most
pronounced for upright PRA (3.4±1.0 during low salt intake versus
1.3±0.6 during high salt intake, P=0.007 by paired
Student's t test). ACE inhibition was associated with a
marked increase in PRA compared with low salt intake alone (F=20.5,
P=0.002; mean shown in Table 2
). There was significant
diurnal variation in serum aldosterone concentrations
during low salt (F=21.6, P<0.001), high salt (F=12.2,
P=0.001), and ACE inhibition (F=6.7, P=0.009),
such that a nadir occurred during the 5 PM11
PM period (period 2). Low salt intake was associated with
increased aldosterone compared with high salt intake
(F=32.4, P=0.001; Figure 2B
). ACE inhibition decreased the
aldosterone level (F=21.5, P=0.002) under low
salt conditions, but the aldosterone level remained
significantly higher than under high salt conditions (F=31.6,
P=0.001).
There was significant diurnal variation in serum cortisol during low
salt intake (F=23.4, P<0.001), high salt intake (F=14.4,
P<0.001), and ACE inhibition (F=7.4, P=0.008).
There was no effect of either salt intake or ACE inhibition on serum
cortisol levels (Figure 3A
). There was no effect of time of day on
plasma catecholamines. Plasma catecholamines
were significantly increased in the setting of salt depletion compared
with salt repletion (F=8.4, P=0.02; Figure 3B
). There was no
effect of ACE inhibition on plasma catecholamines.
Fibrinolytic Parameters
There was significant diurnal variation in PAI-1 antigen under low
(effect of time of day, F=9.20, P=0.003) and high (F=6.48,
P=0.010) salt conditions and in PAI-1 activity under low
(F=4.9, P=0.025) and high (F=5.4, P=0.018)
conditions, such that levels were lowest during the period from 5
PM through 11 PM (period 2; Figure 4
, Table 2
).
Treatment with quinapril attenuated this diurnal variation in PAI-1
antigen (time of day, F=2.65, P=0.106) and activity (F=3.32,
P=0.066). There was significant diurnal variation in tPA
antigen under all 3 study conditions: low salt (F=11.66,
P=0.001), high salt (F=9.68, P=0.002), and during
quinapril (F=5.80, P=0.005). There was significant diurnal
variation in the molar ratio of PAI-1 to tPA antigen under low salt
conditions alone (F=4.6, P=0.029) but not under high salt
conditions or during treatment with quinapril.
|
Salt intake had no significant effect on PAI-1 antigen, PAI-1 activity,
or tPA antigen, measured over the entire 24-hour period (Figure 4
).
However, compared with low salt intake, high salt intake was associated
with a decrease in PAI-1 antigen during the period from 8
AM through 2 PM (period 1, F=5.76,
P=0.048). tPA antigen tended to be lower during the
period 2 high salt intake compared with low salt intake, but
this difference did not reach significance (F=4.1,
P=0.08).
ACE inhibition significantly decreased PAI-1 antigen levels measured
over the entire 24-hour period (26%, F=6.68, P=0.035) under
low salt conditions (Figure 4
). This effect was most pronounced during
the morning hours when PAI-1 antigen levels were highest (F=24,
P=0.002 for drug effect from 8 AM through 2
PM) but was also seen during period 3 (F=11.4,
P=0.012). ACE inhibition also significantly lowered PAI-1
activity (F=6.48, P=0.038 for the full 24-hour period and
F=7.42, P=0.03 for period 1). There was a significant
interaction between the subjects' renin status and the effect of ACE
inhibition on PAI-1 antigen (F=24.0, P=0.002 for
interaction) and PAI-1 activity (F=12.2, P=0.01). There was
no effect of ACE inhibition on tPA antigen (Table 2
) during salt
depletion. For this reason, the PAI-1:tPA molar ratio (Table 2
) was
significantly lower during period 1 with ACE inhibition than during low
salt alone (F=11.1, P=0.013). In addition, the PAI-1:tPA
ratio was significantly lower during ACE inhibition than during high
salt intake during period 3 (F=12.0, P=0.011).
To determine the relationship between activation of the RAS and PAI-1 antigen, the correlation between PRA or aldosterone and PAI-1 antigen levels was determined. In addition, because of the diurnal variation in PAI-1, the relationship between PAI-1 antigen and cortisol or catecholamine levels was also determined. There was a significant positive correlation between PAI-1 antigen and PRA (r=0.28, t=3.02, P=0.003) measured under both low and high salt intakes. In the presence of quinapril, the relationship between PAI-1 and PRA was no longer significant (r=0.25, t=1.85, P=0.069).
There was a highly significant correlation between PAI-1 antigen levels
and serum aldosterone under low salt conditions [PAI-1
antigen=0.41(aldosterone)+7.4; r=0.56,
P=7.0x10-8, Figure 5
] that remained significant during ACE
inhibition [PAI-1 antigen=0.36(aldosterone)+8.5;
r=0.26, P=0.019]. In contrast, there was no
correlation between PAI-1 and aldosterone under high salt
conditions (r=0.10, t=0.89, P=0.38).
PAI-1 antigen also correlated with serum cortisol levels under both
high (r=0.28, t=2.6, P=0.01) and low
(r=0.40, t=3.8, P=0.002) salt
conditions, but there was no relationship between PAI-1 antigen and
cortisol concentrations in the presence of quinapril
(r=0.06, t=0.5, P=0.62). There was no
relationship between plasma catecholamines and PAI-1
antigen concentrations.
|
| Discussion |
|---|
|
|
|---|
In this study, activation of the RAS during low salt intake was documented by significant increases in PRA and serum aldosterone concentrations. Under these conditions, PAI-1 antigen was increased compared with during high salt intake during the period from 8 AM through 2 PM. This is consistent with data from an uncontrolled study that showed that patients with ischemic heart disease who were treated with diuretics had significantly higher levels of PAI-1 antigen compared with patients who did not receive diuretics.26 The correlation between PAI-1 antigen and serum aldosterone concentrations observed in this study further supports an interaction between the RAS and fibrinolytic system.
As other investigators have reported,27 28 we observed marked diurnal variation in PAI-1 antigen and activity, with a nadir occurring during the 5 PM11 PM time period. tPA antigen, which reflects tPA:PAI-1 complex as well as free tPA, followed a similar pattern. This diurnal pattern of variation in PAI-1 antigen and activity may have clinical significance in that it mirrors the pattern of variation in time of occurrence of MI reported by several investigators.29 30 Furthermore, it has recently been reported that the thrombolytic efficacy of intravenous tPA is reduced when administered during the morning hours,31 coincident with the diurnal peak in PAI-1.
The pattern of diurnal variation in PAI-1 antigen and activity observed in this study closely mimicked the pattern of diurnal variation in aldosterone. Aldosterone secretion is influenced by Ang II, adrenocorticotropic hormone, and potassium.32 The sensitivity of the adrenal cortex to Ang II varies with sodium intake such that under conditions of salt depletion, Ang II is the major determinant of aldosterone.33 34 The highly statistically significant correlation between serum aldosterone and PAI-1 antigen under low salt conditions and the lack of such a correlation under high salt conditions (when aldosterone levels are independent of Ang II) supports the hypothesis that Ang II regulates vascular PAI-1 levels.
There was also a significant correlation between serum cortisol concentrations and PAI-1 antigen under both high and low salt conditions in this study. This contrasts with data from Chandler et al28 who concluded that cortisol was not responsible for circadian variation in PAI-1 activity; however, in this earlier study, subjects were not studied under controlled salt conditions, and there was wide interindividual variation in the time of peak and trough PAI-1 activity. One possible explanation for the observed correlation between cortisol and PAI-1 antigen is that glucocorticoids increase PAI-1 synthesis. Dexamethasone has been shown to increase PAI-1 expression directly or to enhance the response to interleukin-1 in both rat and human hepatocyte cell lines.35 36 Furthermore, a glucocorticoid responsive element has been localized to the region -330 to +75 of the PAI-1 gene.37 Data from the present study suggest that there may be an interactive effect of glucocorticoids and Ang II on PAI-1 synthesis, in that ACE inhibition abolished the correlation between cortisol and PAI-1. This potential mechanistic interaction remains to be examined in vitro.
ACE inhibitors have been shown to reduce progression of atherosclerosis in several animal models5 6 38 and to reduce the vascular expression of PAI-1 in normal and balloon-injured vessels.39 Two large-scale clinical trials of ACE inhibitor therapy administered to patients with left ventricular dysfunction, Survival and Ventricular Enlargement Trial (SAVE) and Studies on Left Ventricular Enlargement (SOLVD) trials, both reported similar reductions in the rate of ischemic cardiovascular events.7 8 The present study suggests a mechanism whereby ACE inhibitors could alter the incidence of ischemic cardiovascular events in the setting of an activated RAS. Specifically, ACE inhibition significantly lowered both PAI-1 antigen and activity during salt depletion. This is consistent with data from the Healing and After-load Reducing Therapy (HEART) study, which showed a 44% decrease in PAI-1 antigen and a 22% decrease in PAI-1 activity after 2 weeks of treatment with the ACE inhibitor ramipril after MI.40 In addition, recent studies have reported a relationship between the insertion/deletion polymorphism of the ACE gene and PAI-1 levels,41 42 further supporting a functional link between the RAS and fibrinolytic systems. Whether the effect of ACE inhibition on PAI-1 results from decreased Ang II or from decreased formation of its hexapeptide metabolite Ang IV remains to be determined. Studies in bovine endothelial cells suggest that Ang II regulates PAI-1 expression through Ang IV and a unique non-AT1, non-AT2 receptor.25 The effect of AT1 receptor antagonists on PAI-1 remains to be defined in humans.
We have previously reported a molar ratio of PAI-1 to tPA of 3.9±0.2 measured in healthy human volunteers.40 In the present study, we observed that this ratio varied by up to 45% under low salt and by up to 51% under high salt conditions. In contrast, this index of vascular fibrinolytic balance was consistently at or below 4.1 during all 3 time periods during ACE inhibition and varied by <3%. Thus, although morning PAI-1 antigen was reduced by suppression of the RAS with high salt and interruption of the RAS with ACE inhibition, only ACE inhibition consistently preserved the normal molar ratio of PAI-1 to tPA. This improvement in fibrinolytic balance contrasts with the findings of Wright et al43 who reported a disproportional reduction in tPA compared with PAI-1 in infarct survivors treated with captopril but agrees with data from infarct survivors treated with ramipril.40 A lack of effect of ACE inhibition on tPA antigen in the present study may simply reflect the effects of ACE inhibition on the kallikrein-kinin system as well as the RAS. ACE inhibitors not only decrease the production of Ang II but also decrease the degradation of bradykinin.15 16 Bradykinin has been shown to be a potent stimulus for tPA secretion in vitro and in vivo.17 18
The present study may underrepresent the potential magnitude of the impact of activation of the RAS on plasma fibrinolytic balance because the majority (6 of 9) of the subjects studied had low upright PRA during salt depletion. The reason for this is not clear because all but 1 of the subjects were white. Nevertheless, to the extent that low-renin subjects tend to be resistant to the effects of ACE inhibitors,44 the preponderance of low-renin subjects in the present study would be expected to attenuate the effect of activation of the RAS and of ACE inhibition on PAI-1. The small number of subjects studied did not allow us to compare the effects of salt and ACE inhibition on PAI-1 in low-renin versus high-renin subjects; however, there was an interaction between renin status and the effect of ACE inhibition on PAI-1 antigen and activity. The preponderance of low-renin subjects studied may also explain the lack of a blood pressure effect of ACE inhibition during salt depletion.
In summary, this study provides evidence for a direct functional link between the RAS and fibrinolytic system in humans. It suggests a mechanism through which ACE inhibitors could favorably alter progression of vascular disease, particularly in the setting of clinical states associated with activation of the tissue RAS. Specifically, it speaks to a role of the RAS in regulating circadian variation in PAI-1. Further studies are needed to clarify the role of Ang II versus Ang IV in the regulation of PAI-1 in vivo and to define the clinical significance of this physiological interaction in patients with cardiovascular disease.
| Acknowledgments |
|---|
| Footnotes |
|---|
Received May 8, 1998; first decision June 25, 1998; accepted July 21, 1998.
| References |
|---|
|
|
|---|
2. Alderman MH, Madhavan S, Ooi WL, Cohen H, Sealey JE, Laragh JH. Association of the renin-sodium profile with the risk of myocardial infarction in patients with hypertension. N Engl J Med. 1991;324:10981104.[Abstract]
3.
Hypertension Detection and Follow-up Program
Cooperative Research Group. The effect of antihypertensive drug
treatment on mortality in the presence of resting electrocardiographic
abnormalities at baseline: the HDFP experience. Circulation.. 1984;70:9961003.
4. Multiple Risk Factor Intervention Trial Research Group. Baseline rest electrocardiographic abnormalities, antihypertensive treatment, and mortality in the Multiple Risk Factor Intervention Trial. Am J Cardiol.. 1985;55:115.[Medline] [Order article via Infotrieve]
5.
Chobanian AV, Haudenschild CC, Nickerson C, Drago R.
Anti-atherogenic effect of captopril in the Watanabe heritable
hyperlipidemic rabbit. Hypertension.. 1990;15:327331.
6. Hayek T, Keidar S, Mei-Yi, Oiknine J, Breslow J. Effect of angiotensin converting enzyme inhibitors on LDL lipid peroxidation and atherosclerosis progression in apo E deficient mice. Circulation. 1995;92(suppl I):I-625. Abstract.
7. Pfeffer MA, Braunwald EA, Moye LA, Basta L, Brown EJ Jr, Cuddy TE, Davis BR, Geltman EM, Goldman S, Flaker GC, Klein M, Lamas GA, Packer M, Rouleau J, Rouleau JL, Rutherford J, Wertheimer JH, Hawkins CM. Effect of captopril on mortality and morbidity in patients with left ventricular dysfunction after myocardial infarction. N Engl J Med.. 1992;327:669677.[Abstract]
8. Yusuf S, Pepine CJ, Garces C, Pouleur H, Salem D, Kostis J, Benedict C, Rousseau M, Bourassa M, Pitt B. Effect of enalapril on myocardial infarction and unstable angina in patients with low ejection fractions. Lancet.. 1992;340:11731178.[Medline] [Order article via Infotrieve]
9. Vaughan DE, Lazos SA, Tong K. Angiotensin II regulates the expression of plasminogen activator inhibitor-1 in cultured endothelial cells. J Clin Invest.. 1995;95:9951001.
10.
Ridker PM, Gaboury CL, Conlin PR, Seely EW, Williams
GH, Vaughan DE. Stimulation of plasminogen
activator inhibitor in vivo by infusion of
angiotensin II. Circulation.. 1993;87:19691973.
11.
Sprengers ED, Kluft C. Plasminogen
activator inhibitors. Blood.. 1987;69:381387.
12.
Schneiderman J, Sawdey MS, Keeton MR, Bordin GM,
Bernstein EF, Dilley RB, Loskutoff DJ. Increased type 1
plasminogen activator inhibitor
gene expression in atherosclerotic human arteries. Proc Natl Acad
Sci U S A.. 1992;89:69987002.
13. Juhan-Vague I, Alessi MC. PAI-1, obesity, insulin resistance and risk of cardiovascular events. Thromb Haemost.. 1997;78:656660.[Medline] [Order article via Infotrieve]
14. Hamsten A, de Fairde U, Walldius G, Dahlen G, Szamosi A, Landou C, Blomback M, Wiman B. Plasminogen activator inhibitor in plasma: risk factor for recurrent myocardial infarction. Lancet.. 1987;2:39.[Medline] [Order article via Infotrieve]
15. Erdos EG. The angiotensin I converting enzyme. Fed Proc.. 1977;36:17601765.[Medline] [Order article via Infotrieve]
16.
Brown NJ, Ryder D, Gainer JV, Morrow JD, Nadeau J.
Differential effects of ACE inhibitors on the vasodepressor
and prostacyclin responses to bradykinin. J Pharmacol Exp
Ther.. 1996;279:703712.
17. Brown NJ, Nadeau J, Vaughan DE. Selective stimulation of tissue-type plasminogen activator (t-PA) in vivo by infusion of bradykinin. Thromb Haemost. 1997;77:522525.[Medline] [Order article via Infotrieve]
18.
Smith D, Gilbert M, Owen WG. Tissue
plasminogen activator release in vivo in
response to vasoactive agents. Blood.. 1985;66:835839.
19. Emeis JJ, Tranquille N. On the role of bradykinin in secretion from vascular endothelial cells. Agents Actions.. 1992;38:285291.
20. Verheijen JH, Chang GTG, Kluft C. Evidence for the occurrence of a fast acting inhibitor of tissue-type plasminogen activator in plasma. Thromb Haemost.. 1984;51:392395.[Medline] [Order article via Infotrieve]
21.
Ridker PM, Vaughan DE, Stampfer MJ, Manson JE, Shen C,
Newcomer LM, Goldhaber SZ, Hennekens CH. Baseline fibrinolytic state
and the risk of future venous thrombosis: a prospective study of
endogenous tissue plasminogen
activator and plasminogen activator
inhibitor. Circulation.. 1992;85:18221827.
22. Workman RJ, Sussman CR, Burkitt DW, Liddle GW. Circulating levels of angiotensin I measured by radioimmunoassay in hypertensive subjects. J Lab Clin Med.. 1979;93:847856.[Medline] [Order article via Infotrieve]
23. Holmes C, Eisenhofer G, Goldstein DS. Improved assay for plasma dihydroxyphenylacetic acid and other catechols using high-performance liquid chromatography with electrochemical detection. J Chromatogr B.. 1994;653:131138.[Medline] [Order article via Infotrieve]
24. Tuck ML, Williams GH, Cain JP, Sullivan JM, Dluhy RG. Relation of age, diastolic blood pressure, and known duration of hypertension to the presence of low-renin essential hypertension. Am J Cardiol.. 1973;32:637642.[Medline] [Order article via Infotrieve]
25. Kerins DM, Hao Q, Vaughan DE. Angiotensin induction of PAI-1 expression in endothelial cells is mediated by the hexapeptide angiotensin IV. J Clin Invest.. 1995;96:25152520.
26. Pederson OD, Gram J, Bagger H, Keller N, Jespersen J. Regulation of tissue-type plasminogen activator mediated fibrinolysis by plasminogen activator inhibitor type-1 in patients with ischemic heart disease: possible unfavourable effects of diuretics. Coron Artery Dis.. 1994;5:617623.[Medline] [Order article via Infotrieve]
27.
Angleton P, Chandler WL, Schmer G. Diurnal
variation of tissue-type plasminogen activator
and its rapid inhibitor. Circulation.. 1989;79:101106.
28. Chandler WL, Mornin D, Whitten RO, Angleton P, Farin FM, Fritsche TR, Veith RC, Stratton JR. Insulin, cortisol and catecholamines do not regulate circadian variations in fibrinolytic activity. Thromb Res.. 1990;58:112.[Medline] [Order article via Infotrieve]
29. Muller JE, Stone PH, Turi ZG, Rutherford JD, Czeisler CA, Parker C, Poole WK, Passamani E, Roberts R, Robertson T, Sobel BE, Willerson JT, Braunwald E. Circadian variation in the frequency of onset of acute myocardial infarction. N Engl J Med.. 1985;313:13151322.[Abstract]
30.
Ridker PM, Manson JE, Buring JE, Muller JE, Hennekens
CH. Circadian variation of acute myocardial infarction and the effect
of low-dose aspirin in a randomized trial of physicians.
Circulation.. 1990;82:897902.
31.
Kurnik PB. Circadian variation in the efficacy of
tissue-type plasminogen activator.
Circulation.. 1995;91:13411346.
32. Sealey JE, Laragh JH. The renin-angiotensin-aldosterone system for normal regulation of blood pressure and sodium and potassium homeostasis. In: JH Laragh, BM Brenner, eds. Hypertension: Pathophysiology, Diagnosis, and Management. New York, NY: Raven Press; 1990:12871317.
33. Hollenberg NK, Chenitz WR, Adams DF, Williams GH. Reciprocal influence of salt intake on adrenal glomerulosa and renal vascular responses to angiotensin II in normal man. J Clin Invest.. 1974;54:3442.
34. Oelkers W, Brown JJ, Fraser R, Lever AF, Morton JJ, Robertson JI. Sensitization of the adrenal cortex to angiotensin II in sodium-deplete man. Circ Res.. 1974;40:6977.[Medline] [Order article via Infotrieve]
35.
Heaton JH, Kathju S, Gelehrter TD. Transcriptional and
posttranscriptional regulation of type 1 plasminogen
activator inhibitor and tissue-type
plasminogen activator gene expression in HTC
rat hepatoma cells by glucocorticoids and cyclic
nucleotides. Mol Endocrinol.. 1992;6:5360.
36.
Heaton JH, Gelehrter TD. Glucocorticoid induction of
plasminogen activator and
plasminogen activator-inhibitor
messenger RNA in rat hepatoma cells. Mol Endocrinol.. 1989;3:349355.
37.
van Zonneveld AJ, Curriden SA, Loskutoff DJ. Type 1
plasminogen activator inhibitor
gene: functional analysis and glucocorticoid regulation of its
promoter. Proc Natl Acad Sci U S A.. 1988;85:55255529.
38. Aberg G, Ferrer P. Effects of captopril on atherosclerosis in cynomolgus monkeys. J Cardiovasc Pharmacol. 1990;15(suppl):S65S72.
39.
Hamdan AD, Quist WC, Gagne JB, Feener EP.
Angiotensin-converting enzyme inhibition suppresses
plasminogen activator inhibitor-1
expression in the neointima of balloon- injured rat aorta.
Circulation.. 1996;93:10731078.
40.
Vaughan DE, Rouleau J-L, Ridker PM, Arnold JMO,
Menapace FJ, Pfeffer MA, on behalf of the HEART Study Investigators.
Effects of ramipril on plasma fibrinolytic balance in patients with
acute anterior myocardial infarction. Circulation.. 1997;96:442447.
41.
Margaglione M, Grandone E, Vecchione G, Cappucci G,
Giuliani N, Colaizzo D, Celentano E, Panico S, Diminno G.
Plasminogen activator inhibitor 1
(PAI-1) antigen plasma levels in subjects attending a
metabolic ward: relation to polymorphisms of PAI-1 and
angiotensin converting enzyme (ACE) genes.
Arterioscler Thromb Vasc Biol.. 1997;17:20822087.
42.
Kim D-K, Kim J-W, Kim S, Gwon H-C, Ryu J-C, Huh
J-E, Choo J-A, Choi Y, Rhee C-H, Lee W-R. Polymorphism of
angiotensin converting enzyme gene is associated with
circulating levels of plasminogen activator
inhibitors-1. Arterioscler Thromb Vasc Biol.. 1997;17:32423247.
43. Wright RA, Flapan AD, Alberti KG, Ludlam CA, Fox KAA. Effects of captopril therapy on endogenous fibrinolysis in men with recent uncomplicated myocardial infarction. J Am Coll Cardiol.. 1994;24:6773.[Abstract]
44. Case DB, Atlas SA, Laragh JH, Sullivan PA, Sealey JE. Use of first-dose response or plasma renin activity to predict the long-term effect of captopril: identification of triphasic pattern of blood pressure response. J Cardiovasc Pharmacol.. 1980;2:339346.[Medline] [Order article via Infotrieve]
This article has been cited by other articles:
![]() |
A. Miceli, R. Capoun, C. Fino, P. Narayan, A. J. Bryan, G. D. Angelini, and M. Caputo Effects of Angiotensin-Converting Enzyme Inhibitor Therapy on Clinical Outcome in Patients Undergoing Coronary Artery Bypass Grafting J. Am. Coll. Cardiol., November 3, 2009; 54(19): 1778 - 1784. [Abstract] [Full Text] [PDF] |
||||
![]() |
M. Cortinovis, N. Perico, D. Cattaneo, and G. Remuzzi Aldosterone and progression of kidney disease Therapeutic Advances in Cardiovascular Disease, April 1, 2009; 3(2): 133 - 143. [Abstract] [PDF] |
||||
![]() |
Y. Jeong, D. F. Chaupin, K. Matsushita, M. Yamakuchi, S. J. Cameron, C. N. Morrell, and C. J. Lowenstein Aldosterone activates endothelial exocytosis PNAS, March 10, 2009; 106(10): 3782 - 3787. [Abstract] [Full Text] [PDF] |
||||
![]() |
G. Remuzzi, D. Cattaneo, and N. Perico The Aggravating Mechanisms of Aldosterone on Kidney Fibrosis J. Am. Soc. Nephrol., August 1, 2008; 19(8): 1459 - 1462. [Abstract] [Full Text] [PDF] |
||||
![]() |
C. Usalan and H. Buyukhatipoglu A Dynamic Comparative Study Concerning the Effects of Angiotensin-Converting Enzyme Inhibitors and Aldosterone Receptor Blockers on the Fibrinolytic System Clinical and Applied Thrombosis/Hemostasis, April 1, 2008; 14(2): 203 - 209. [Abstract] [PDF] |
||||
![]() |
M. Agirbasli, A. Cincin, and O. A Baykan Short-term effects of angiotensin receptor blockers on blood pressure control, and plasma inflammatory and fibrinolytic parameters in patients taking angiotensin-converting enzyme inhibitors Journal of Renin-Angiotensin-Aldosterone System, March 1, 2008; 9(1): 22 - 26. [Abstract] [PDF] |
||||
![]() |
N. J. Brown Aldosterone and Vascular Inflammation Hypertension, February 1, 2008; 51(2): 161 - 167. [Full Text] [PDF] |
||||
![]() |
R. R. S. Packard and P. Libby Inflammation in Atherosclerosis: From Vascular Biology to Biomarker Discovery and Risk Prediction Clin. Chem., January 1, 2008; 54(1): 24 - 38. [Abstract] [Full Text] [PDF] |
||||
![]() |
H. L. Lazar All Coronary Artery Bypass Graft Surgery Patients Will Benefit From Angiotensin-Converting Enzyme Inhibitors Circulation, January 1, 2008; 117(1): 6 - 8. [Full Text] [PDF] |
||||
![]() |
J. K. Devin, L. S. Blevins Jr., D. K. Verity, Q. Chen, J. R. Bloodworth Jr., J. Covington, and D. E. Vaughan Markedly Impaired Fibrinolytic Balance Contributes to Cardiovascular Risk in Adults with Growth Hormone Deficiency J. Clin. Endocrinol. Metab., September 1, 2007; 92(9): 3633 - 3639. [Abstract] [Full Text] [PDF] |
||||
![]() |
A. Briggs, B. Mihaylova, M. Sculpher, A. Hall, J. Wolstenholme, M. Simoons, J. Deckers, R. Ferrari, W. J Remme, M. Bertrand, et al. Cost effectiveness of perindopril in reducing cardiovascular events in patients with stable coronary artery disease using data from the EUROPA study Heart, September 1, 2007; 93(9): 1081 - 1086. [Abstract] [Full Text] [PDF] |
||||
![]() |
Authors/Task Force Members:, G. Mancia, G. De Backer, A. Dominiczak, R. Cifkova, R. Fagard, G. Germano, G. Grassi, A. M. Heagerty, S. E. Kjeldsen, et al. 2007 Guidelines for the Management of Arterial Hypertension: The Task Force for the Management of Arterial Hypertension of the European Society of Hypertension (ESH) and of the European Society of Cardiology (ESC) Eur. Heart J., June 11, 2007; (2007) ehm236v1. [Full Text] [PDF] |
||||
![]() |
T. J. Wang, P. Gona, M. G. Larson, D. Levy, E. J. Benjamin, G. H. Tofler, P. F. Jacques, J. B. Meigs, N. Rifai, J. Selhub, et al. Multiple Biomarkers and the Risk of Incident Hypertension Hypertension, March 1, 2007; 49(3): 432 - 438. [Abstract] [Full Text] [PDF] |
||||
![]() |
V. J. Dzau, E. M. Antman, H. R. Black, D. L. Hayes, J. E. Manson, J. Plutzky, J. J. Popma, and W. Stevenson The Cardiovascular Disease Continuum Validated: Clinical Evidence of Improved Patient Outcomes: Part I: Pathophysiology and Clinical Trial Evidence (Risk Factors Through Stable Coronary Artery Disease) Circulation, December 19, 2006; 114(25): 2850 - 2870. [Full Text] [PDF] |
||||
![]() |
P. G. Arndt, S. K. Young, K. R. Poch, J. A. Nick, S. Falk, R. W. Schrier, and G. S. Worthen Systemic Inhibition of the Angiotensin-Converting Enzyme Limits Lipopolysaccharide-Induced Lung Neutrophil Recruitment through Both Bradykinin and Angiotensin II-Regulated Pathways J. Immunol., November 15, 2006; 177(10): 7233 - 7241. [Abstract] [Full Text] [PDF] |
||||
![]() |
M.-C. Alessi and I. Juhan-Vague PAI-1 and the Metabolic Syndrome: Links, Causes, and Consequences Arterioscler Thromb Vasc Biol, October 1, 2006; 26(10): 2200 - 2207. [Abstract] [Full Text] [PDF] |
||||
![]() |
M. P. Ponda and T. H. Hostetter Aldosterone Antagonism in Chronic Kidney Disease Clin. J. Am. Soc. Nephrol., July 1, 2006; 1(4): 668 - 677. [Full Text] [PDF] |
||||
![]() |
N. J. Brown, J. A.S. Muldowney III, and D. E. Vaughan Endogenous NO Regulates Plasminogen Activator Inhibitor-1 During Angiotensin-Converting Enzyme Inhibition Hypertension, March 1, 2006; 47(3): 441 - 448. [Abstract] [Full Text] [PDF] |
||||
![]() |
A. W.J.H. Dielis, M. Smid, H. M.H. Spronk, K. Hamulyak, A. A. Kroon, H. ten Cate, and P. W. de Leeuw The Prothrombotic Paradox of Hypertension: Role of the Renin-Angiotensin and Kallikrein-Kinin Systems Hypertension, December 1, 2005; 46(6): 1236 - 1242. [Abstract] [Full Text] [PDF] |
||||
![]() |
J. C. Aldigier, T. Kanjanbuch, L.-J. Ma, N. J. Brown, and A. B. Fogo Regression of Existing Glomerulosclerosis by Inhibition of Aldosterone J. Am. Soc. Nephrol., November 1, 2005; 16(11): 3306 - 3314. [Abstract] [Full Text] [PDF] |
||||
![]() |
J. Ma, F. Albornoz, C. Yu, D. W. Byrne, D. E. Vaughan, and N. J. Brown Differing Effects of Mineralocorticoid Receptor-Dependent and -Independent Potassium-Sparing Diuretics on Fibrinolytic Balance Hypertension, August 1, 2005; 46(2): 313 - 320. [Abstract] [Full Text] [PDF] |
||||
![]() |
K. Yamamoto, K. Takeshita, T. Kojima, J. Takamatsu, and H. Saito Aging and plasminogen activator inhibitor-1 (PAI-1) regulation: implication in the pathogenesis of thrombotic disorders in the elderly Cardiovasc Res, May 1, 2005; 66(2): 276 - 285. [Abstract] [Full Text] [PDF] |
||||
![]() |
H. L. Lazar Role of Angiotensin-Converting Enzyme Inhibitors in the Coronary Artery Bypass Patient Ann. Thorac. Surg., March 1, 2005; 79(3): 1081 - 1089. [Abstract] [Full Text] [PDF] |
||||
![]() |
S. I. Sokol, E. L. Portnay, J. P. Curtis, M. A. Nelson, P. R. Hebert, J. F. Setaro, and J. M. Foody Modulation of the renin-angiotensin-aldosterone system for the secondary prevention of stroke Neurology, July 27, 2004; 63(2): 208 - 213. [Abstract] [Full Text] [PDF] |
||||
![]() |
P. M Ridker, N. J. Brown, D. E. Vaughan, D. G. Harrison, and J. L. Mehta Established and Emerging Plasma Biomarkers in the Prediction of First Atherothrombotic Events Circulation, June 29, 2004; 109(25_suppl_1): IV-6 - IV-19. [Full Text] [PDF] |
||||
![]() |
C. Sierra and L. M Ruilope Review: Role of the selective aldosterone receptor blockers in arterial hypertension Journal of Renin-Angiotensin-Aldosterone System, March 1, 2004; 5(1): 23 - 25. [Abstract] [PDF] |
||||
![]() |
J. P. Tsikouris, J. A. Suarez, G. E. Meyerrose, M. Ziska, D. Fike, and J. Smith Questioning a Class Effect: Does ACE Inhibitor Tissue Penetration Influence the Degree of Fibrinolytic Balance Alteration following an Acute Myocardial Infarction? J. Clin. Pharmacol., February 1, 2004; 44(2): 150 - 157. [Abstract] [Full Text] [PDF] |
||||
![]() |
M. Pretorius, L. J. Murphey, J. A. McFarlane, D. E. Vaughan, and N. J. Brown Angiotensin-Converting Enzyme Inhibition Alters the Fibrinolytic Response to Cardiopulmonary Bypass Circulation, December 23, 2003; 108(25): 3079 - 3083. [Abstract] [Full Text] [PDF] |
||||
![]() |
M. Epstein Aldosterone receptor blockade and the role of eplerenone: evolving perspectives Nephrol. Dial. Transplant., October 1, 2003; 18(10): 1984 - 1992. [Full Text] [PDF] |
||||
![]() |
P. Sawathiparnich, L. J. Murphey, S. Kumar, D. E. Vaughan, and N. J. Brown Effect of Combined AT1 Receptor and Aldosterone Receptor Antagonism on Plasminogen Activator Inhibitor-1 J. Clin. Endocrinol. Metab., August 1, 2003; 88(8): 3867 - 3873. [Abstract] [Full Text] [PDF] |
||||
![]() |
T. Mohri, N. Emoto, H. Nonaka, H. Fukuya, K. Yagita, H. Okamura, and M. Yokoyama Alterations of Circadian Expressions of Clock Genes in Dahl Salt-Sensitive Rats Fed a High-Salt Diet Hypertension, August 1, 2003; 42(2): 189 - 194. [Abstract] [Full Text] [PDF] |
||||
![]() |
D. E. Vaughan Plasminogen Activator Inhibitor-1 and the Calculus of Mortality After Myocardial Infarction Circulation, July 29, 2003; 108(4): 376 - 377. [Full Text] [PDF] |
||||
![]() |
A. H. Schmaier The kallikrein-kinin and the renin-angiotensin systems have a multilayered interaction Am J Physiol Regulatory Integrative Comp Physiol, July 1, 2003; 285(1): R1 - R13. [Abstract] [Full Text] [PDF] |
||||
![]() |
W. F. Young Jr. Minireview: Primary Aldosteronism--Changing Concepts in Diagnosis and Treatment Endocrinology, June 1, 2003; 144(6): 2208 - 2213. [Abstract] [Full Text] [PDF] |
||||
![]() |
M. Pretorius, D. Rosenbaum, D. E. Vaughan, and N. J. Brown Angiotensin-Converting Enzyme Inhibition Increases Human Vascular Tissue-Type Plasminogen Activator Release Through Endogenous Bradykinin Circulation, February 4, 2003; 107(4): 579 - 585. [Abstract] [Full Text] [PDF] |
||||
![]() |
S. I. McFarlane and J. R. Sowers Aldosterone Function in Diabetes Mellitus: Effects on Cardiovascular and Renal Disease J. Clin. Endocrinol. Metab., February 1, 2003; 88(2): 516 - 523. [Full Text] [PDF] |
||||
![]() |
N. J. Brown, S. Kumar, C. A. Painter, and D. E. Vaughan ACE Inhibition Versus Angiotensin Type 1 Receptor Antagonism: Differential Effects on PAI-1 Over Time Hypertension, December 1, 2002; 40(6): 859 - 865. [Abstract] [Full Text] [PDF] |
||||
![]() |
M. Eren, C. A. Painter, J. B. Atkinson, P. J. Declerck, and D. E. Vaughan Age-Dependent Spontaneous Coronary Arterial Thrombosis in Transgenic Mice That Express a Stable Form of Human Plasminogen Activator Inhibitor-1 Circulation, July 23, 2002; 106(4): 491 - 496. [Abstract] [Full Text] [PDF] |
||||
![]() |
D. A. Rosenbaum, M. Pretorius, J. V. Gainer, D. Byrne, L. J. Murphey, C. A. Painter, D. E. Vaughan, and N. J. Brown Ethnicity Affects Vasodilation, but Not Endothelial Tissue Plasminogen Activator Release, in Response to Bradykinin Arterioscler Thromb Vasc Biol, June 1, 2002; 22(6): 1023 - 1028. [Abstract] [Full Text] [PDF] |
||||
![]() |
N. Kobayashi, S. Nakano, S.-i. Mita, T. Kobayashi, T. Honda, Y. Tsubokou, and H. Matsuoka Involvement of Rho-Kinase Pathway for Angiotensin II-Induced Plasminogen Activator Inhibitor-1 Gene Expression and Cardiovascular Remodeling in Hypertensive Rats J. Pharmacol. Exp. Ther., May 1, 2002; 301(2): 459 - 466. [Abstract] [Full Text] [PDF] |
||||
![]() |
E. Svarstad, D. Hultstrom, D. Jensen, G. Jenssen, and B. M. Iversen Renal artery thrombosis with acute renal failure after withdrawal of angiotensin converting enzyme inhibitor: a case report Nephrol. Dial. Transplant., April 1, 2002; 17(4): 687 - 689. [Full Text] [PDF] |
||||
![]() |
P. Sawathiparnich, S. Kumar, D. E. Vaughan, and N. J. Brown Spironolactone Abolishes the Relationship between Aldosterone and Plasminogen Activator Inhibitor-1 in Humans J. Clin. Endocrinol. Metab., February 1, 2002; 87(2): 448 - 452. [Abstract] [Full Text] [PDF] |
||||
![]() |
N. J. Brown, A. Abbas, D. Byrne, J. A. Schoenhard, and D. E. Vaughan Comparative Effects of Estrogen and Angiotensin-Converting Enzyme Inhibition on Plasminogen Activator Inhibitor-1 in Healthy Postmenopausal Women Circulation, January 22, 2002; 105(3): 304 - 309. [Abstract] [Full Text] [PDF] |
||||
![]() |
S. Fava, J. Azzopardi, S. Ellard, and A. T. Hattersley ACE Gene Polymorphism as a Prognostic Indicator in Patients With Type 2 Diabetes and Established Renal Disease Diabetes Care, December 1, 2001; 24(12): 2115 - 2120. [Abstract] [Full Text] [PDF] |
||||
![]() |
C. Ngarmukos and R. J. Grekin Nontraditional aspects of aldosterone physiology Am J Physiol Endocrinol Metab, December 1, 2001; 281(6): E1122 - E1127. [Abstract] [Full Text] [PDF] |
||||
![]() |
J.-B. Michel Contrasting Outcomes of Atheroma Evolution: Intimal Accumulation Versus Medial Destruction Arterioscler Thromb Vasc Biol, September 1, 2001; 21(9): 1389 - 1392. [Full Text] [PDF] |
||||
![]() |
K. Kaikita, A. B. Fogo, L. Ma, J. A. Schoenhard, N. J. Brown, and D. E. Vaughan Plasminogen Activator Inhibitor-1 Deficiency Prevents Hypertension and Vascular Fibrosis in Response to Long-term Nitric Oxide Synthase Inhibition Circulation, August 14, 2001; 104(7): 839 - 844. [Abstract] [Full Text] [PDF] |
||||
![]() |
M. E. Khalil, A. W. Basher, E. J. Brown Jr, and I. A. Alhaddad A remarkable medical story: benefits of angiotensin-converting enzyme inhibitors in cardiac patients J. Am. Coll. Cardiol., June 1, 2001; 37(7): 1757 - 1764. [Abstract] [Full Text] [PDF] |
||||
![]() |
N. J. Brown, L. J. Murphey, N. Srikuma, N. Koschachuhanan, G. H. Williams, and D. E. Vaughan Interactive Effect of PAI-1 4G/5G Genotype and Salt Intake on PAI-1 Antigen Arterioscler Thromb Vasc Biol, June 1, 2001; 21(6): 1071 - 1077. [Abstract] [Full Text] [PDF] |
||||
![]() |
T. Skurk, Y.-M. Lee, and H. Hauner Angiotensin II and Its Metabolites Stimulate PAI-1 Protein Release From Human Adipocytes in Primary Culture Hypertension, May 1, 2001; 37(5): 1336 - 1340. [Abstract] [Full Text] [PDF] |
||||
![]() |
L. Sironi, A. M. Calvio, L. Arnaboldi, A. Corsini, A. Parolari, M. de Gasparo, E. Tremoli, and L. Mussoni Effect of Valsartan on Angiotensin II-Induced Plasminogen Activator Inhibitor-1 Biosynthesis in Arterial Smooth Muscle Cells Hypertension, March 1, 2001; 37(3): 961 - 966. [Abstract] [Full Text] [PDF] |
||||
![]() |
M. Epstein Aldosterone as a determinant of cardiovascular and renal dysfunction J R Soc Med, January 8, 2001; 94(8): 378 - 383. [Full Text] [PDF] |
||||
![]() |
K. Lottermoser, H.-J. Hertfelder, M. Wehling, B. Schiermeyer, H. Vetter, and R. Dusing Effects of the mineralocorticoid fludrocortisone on fibrinolytic function in healthy subjects Journal of Renin-Angiotensin-Aldosterone System, December 1, 2000; 1(4): 357 - 360. [Abstract] [PDF] |
||||
![]() |
H.-C. Chen, J. L. Bouchie, A. S. Perez, A. C. Clermont, S. Izumo, J. Hampe, and E. P. Feener Role of the Angiotensin AT1 Receptor in Rat Aortic and Cardiac PAI-1 Gene Expression Arterioscler Thromb Vasc Biol, October 1, 2000; 20(10): 2297 - 2302. [Abstract] [Full Text] [PDF] |
||||
![]() |
D. C Felmeden and G. Y. Lip The renin-angiotensin-aldosterone system and fibrinolysis Journal of Renin-Angiotensin-Aldosterone System, September 1, 2000; 1(3): 240 - 244. [PDF] |
||||
![]() |
C. Labinjoh, D. E. Newby, P. Dawson, N. R. Johnston, C. A. Ludlam, N. A. Boon, and D. J. Webb Fibrinolytic actions of intra-arterial angiotensin II and bradykinin in vivo in man Cardiovasc Res, September 1, 2000; 47(4): 707 - 714. [Abstract] [Full Text] [PDF] |
||||
![]() |
D. E. Vaughan, N. J. Brown, D. N. E. R. Goodfield, D. D. E. Newby, and P. C. A. Ludlam Effects of Acute Angiotensin II Type 1 Receptor Antagonism and Angiotensin Converting Enzyme Inhibition on Plasma Fibrinolytic Parameters in Patients With Heart Failure Response Circulation, August 8, 2000; 102 (6): e43 - e43. [Full Text] [PDF] |
||||
![]() |
N. J. Brown, M. Agirbasli, and D. E. Vaughan Comparative Effect of Angiotensin-Converting Enzyme Inhibition and Angiotensin II Type 1 Receptor Antagonism on Plasma Fibrinolytic Balance in Humans Hypertension, August 1, 1999; 34(2): 285 - 290. [Abstract] [Full Text] [PDF] |
||||
![]() |
N. J. Brown, J. V. Gainer, C. M. Stein, and D. E. Vaughan Bradykinin Stimulates Tissue Plasminogen Activator Release in Human Vasculature Hypertension, June 1, 1999; 33(6): 1431 - 1435. [Abstract] [Full Text] [PDF] |
||||
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
Hypertension Home | Subscriptions | Archives | Feedback | Authors | Help | AHA Journals Home | Search Copyright © 1998 American Heart Association, Inc. All rights reserved. Unauthorized use prohibited. |