PMID: 11724639Nov 29, 2001Paper

Effects of angiotensin II (AT1) receptor blockade on cardiac vagal control in heart failure

Clinical Science
J C VaileJ N Townend


The objective of the present study was to determine the autonomic effects of angiotensin II (AT(1)) receptor blocker therapy in heart failure. In a randomized double-blind cross-over study, we compared the effects of candesartan and placebo on baroreflex sensitivity and on heart rate variability at rest, during stress and during 24 h monitoring. Acute effects were assessed 4 h after oral candesartan (8 mg) and chronic effects after 4 weeks of treatment (dose titrated to 16 mg daily). The study group comprised 21 patients with heart failure [mean (S.E.M.) ejection fraction 33% (1%)], in the absence of angiotensin-converting enzyme (ACE) inhibitor therapy. We found that acute candesartan was not different from placebo in its effects on blood pressure or mean RR interval. Chronic candesartan significantly reduced blood pressure [placebo, 137 (3)/82 (3) mmHg; candesartan, 121 (4)/75 (2) mmHg; P<0.001; values are mean (S.E.M.)], but had no effect on mean RR interval [placebo, 857 (25) ms; candesartan, 857 (21) ms]. Compared with placebo there were no significant effects of acute or chronic candesartan on heart rate variability in the time domain and no consistent effects in the frequency domain. Baroreflex sensitivity assessed by th...Continue Reading


Feb 11, 2004·Progress in Biophysics and Molecular Biology·Irving H ZuckerKaushik P Patel
Nov 5, 2003·American Heart Journal·Elisabetta De TommasiMaria Vittoria Pitzalis
Feb 12, 2010·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Rohit RamchandraClive N May
Dec 20, 2008·Journal of Applied Physiology·Gaelle DeleyJ Andrew Taylor
Oct 7, 2010·Heart Failure Reviews·Monali Y DesaiPaul J Hauptman
Jan 9, 2014·Psychophysiology·Chia-Ying ChouChris R Brewin

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