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  • Title: Enalapril improves systemic and renal hemodynamics and allows regression of left ventricular mass in essential hypertension.
    Author: Dunn FG, Oigman W, Ventura HO, Messerli FH, Kobrin I, Frohlich ED.
    Journal: Am J Cardiol; 1984 Jan 01; 53(1):105-8. PubMed ID: 6318542.
    Abstract:
    Enalapril, a new angiotensin-converting enzyme inhibitor, is an effective antihypertensive agent for both renovascular and essential hypertension. It is structurally different from captopril in that it does not possess a sulfhydryl group. The systemic and renal hemodynamic, biochemical and cardiac adaptive changes induced by enalapril were studied in 8 patients with essential hypertension before and after 12 weeks of therapy. Mean arterial pressure decreased from 110 to 90 mm Hg (p less than 0.01), and this was mediated through a decrease in total peripheral resistance from 42 +/- 3 to 32 +/- 3 U (p less than 0.01). Cardiac index and heart rate did not change. Renal plasma flow was increased in 6 of 8 patients and renal vascular resistance decreased from 123 +/- 6 to 91 +/- 7 U (p less than 0.001). Left ventricular mass index decreased from a mean of 166 +/- 29 to 117 +/- 8 g/m2 (p less than 0.05) without impaired myocardial contractility. Thus, enalapril lowers arterial pressure by reducing total peripheral resistance without reflexive cardiac effects. It also has favorable hemodynamic effects on the kidney. This is the first report of regression of LV mass with this agent in man.
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