Abstract P243: A Maternal High Salt Diet During Pregnancy and Lactation Affects Offspring Cardiac Function
The maternal environment during pregnancy and lactation has important effects on the offspring’s cardiovascular system. For example, changes in offspring blood pressure and vascular structure have been reported to occur in response to a maternal high salt intake during pregnancy and lactation. However, it remains unclear whether a maternal high salt intake may affect cardiac function in offspring. We previously demonstrated that high salt diet causes aggravation of hypertension in young spontaneously hypertensive rats (SHR). Therefore, in the present study we investigated the influence of exposure to a maternal high salt diet during gestation and lactation on offspring cardiac function in SHR.
SHR dams were fed either a high salt diet (4% NaCl) or a control (0.3% NaCl) diet. After weaning, the offspring were fed the control diet for 8 weeks. Systolic blood pressure and heart rate of the offspring were measured without heating using a photoplethysmographic tail-cuff system at 11 weeks of age. Indices of both left ventricular (LV) systolic and diastolic function (LV developed pressure [LVDP], and maximum rate of LV decline [-dP/dt]) and coronary flow were determined in 12 week old offspring using a Langendorff isolated perfused working heart system.
Offspring of the high-salt diet-fed dams (High salt) had lower blood pressure, heart rate, and indices of both LV systolic and diastolic function, compared with offspring of the control diet-fed dams (control) (Fig.). There were no significant differences in coronary flow or heart weight between the two groups. These results suggest that a maternal high salt intake is a predisposing factor for disturbance of cardiac function in offspring.
Author Disclosures: S. Kagota: B. Research Grant (includes principal investigator, collaborator, or consultant and pending grants as well as grants already received); Modest; The Salt Research Foundation, JAPAN. K. Maruyama: None. B.N. Van Vliet: None. H. Wakuda: None. K. Shinozuka: None.
- © 2015 by American Heart Association, Inc.