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(Hypertension. 1995;25:327-334.)
© 1995 American Heart Association, Inc.

Articles

Lisinopril Improves Aortic Compliance and Renal Flow

Comparison With Nifedipine

Hiroyuki Shimamoto; Yoriko Shimamoto

From the Department of Cardiovascular Medicine, PIA Nakamura Hospital, Hiroshima, Japan.

Correspondence to Hiroyuki Shimamoto, MD, 2-24-1, Koi-Higashi, Nishi-ku, Hiroshima 733, Japan.

Abstract We compared the systemic and regional hemodynamic effects of nifedipine and lisinopril in 26 elderly hypertensive patients with the use of the pulsed Doppler ultrasound technique. Nifedipine is a dihydropyridine calcium antagonist, and lisinopril is an angiotensin-converting enzyme inhibitor. The study had a single-blind crossover design: nifedipine and lisinopril were given for 8 weeks each after washout periods of 4 weeks. Both nifedipine and lisinopril significantly reduced mean arterial pressure to the same extent (P<.01); cardiac output remained unchanged in both nifedipine- and lisinopril-treated groups. Lisinopril increased renal flow significantly (P<.01), but nifedipine did not. Common carotid, vertebral, celiac, and superior mesenteric arterial and diaphragmatic and terminal aortic flows did not show a significant change with either nifedipine or lisinopril. The specific action of lisinopril on the thoracic aorta was a marked improvement of aortic compliance compared with nifedipine, which might be partly responsible for an increase in renal flow. Lisinopril may provide more desirable regional hemodynamic effects and additional benefits for elderly hypertensive patients.

Key Words: nifedipine • hemodynamics • Doppler flowmetry • compliance

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