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European Heart Journal 1986 7(9):792-799;
Copyright © 1986 by the European Society of Cardiology.
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© 1986 The European Society of Cardiology

Alteration of left ventricular diastolic filling in hypertensive patients: Effects of nitrendipine and atenolol

M. DE KOCK, J. A. MELIN, M. E. NANNAN, A. ROBERT, C. BECKERS, F. LAVENNE and J.-M. R. DETRY

Centre of Nuclear Medicine and Division of Cardiology, University of Louvain Medical School Brussels, Belgium

revised 24 February 1986; accepted 2 December 1985.

Address for correspondence: Jacques A. Melin, MD., Centre de Medecine Nucléaire UCL 54,30, Avenue Hippocrate, 54, B-1200 Brussels, Belgium.

Abstract

This study was undertaken to determine the chronic effects of a long-acting calcium-channel blocker (nitrendipine) on resting left ventricular filling abnormalities in ten patients with essential hypertension. Radionuclide left ventricular curves of these hypertensive patients were compared with the curves of twelve normal volunteers and of eight asymptomatic older patients. The curves were analyzed for ejection fraction, peak filling rate (normalized for end-diastolic counts and for stroke counts), time to peak filling rate and filling fraction in the first-third of diastole normalized for cycle length. Heart rate and ejection fraction were similar in both control groups and hypertensive patients before and after nitrendipine. Before nitrendipine, Before nitrendipine, diastolic filling parameters were significantly different in the hypertensive patients as compared with the volunteers and with the volunteers and with the asymptomatic aged patients: peak filling rate was lower, time to peak filling rate was longer and the first-third filling fraction was smaller. After six weeks of nitrendipine therapy, systolic and diastolic blood pressure decreased significantly. After nitrendipine, the time to peak filling rate decreased and the first-third filling fraction and the peak filling rate (normalized for stroke counts) increased significantly. The acute oral administration of 100 mg atenolol induced a further decrease in systolic blood pressure and a significant decrease in heart rate. The effect of combining nitrendipine and atenolol on diastolic indexes was a preserved effect on time to peak filling rate and on the first-third filling fraction. These results suggest that short-term therapy with nitrendipine improves early diastolic dysfunction in hypertensives; the addition of a beta-blocking agent further improved the early diastolic indexes.

Key Words: Primary hypertension, • antihypertensive therapy, • diastolic function.


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