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Circulation, Vol 78, 1394-1400, Copyright © 1988 by American Heart Association

ARTICLES

Systemic and regional hemodynamic and humoral effects of nitrendipine in essential hypertension

E Grossman, S Oren, GE Garavaglia, FH Messerli and ED Frohlich
Department of Internal Medicine, Ochsner Clinic, New Orleans, Louisiana.

The hemodynamic effects of 3 months of nitrendipine therapy were evaluated in 14 patients with mild to moderate essential hypertension. Nitrendipine reduced systolic and diastolic pressures from 145 +/- 4/95 +/- 3 to 119 +/- 3/78 +/- 2 mm Hg, respectively, (p less than 0.001) through a fall in total peripheral resistance index (46 +/- 4 to 34 +/- 3 units/m2, p less than 0.001) without associated reflex cardiac stimulation. This antihypertensive effect was related directly to the height of pretreatment arterial pressure (r = -0.67, p = 0.006) but not to age or pretreatment plasma renin activity. Renal and forearm blood flow increased, vascular resistance decreased, and glomerular filtration rate remained stable. In addition, nitrendipine reduced left ventricular mass index (133 +/- 7 to 116 +/- 5 g/m2, p = 0.003) and wall thickness, changes that were accompanied by improvement in diastolic as well as systolic (ejection fraction and fractional fiber shortening rate) left ventricular functions. Intravascular volume did not expand with reduction in pressure. This study provides new information concerning the long-term hemodynamic effects and associated echocardiographic changes with nitrendipine. It also provides the first regional hemodynamic data in essential hypertensive patients detailing forearm and splanchnic changes and renal blood flow increase during prolonged treatment.

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