Abstract: Aim To invest igate theEffect of benazepril on hypertensive left ventricular hypertrophy(LVH)and ventricular a rrhy thmias (VAs).Methods Thecardiac shape and arrhy thmic prevalencc were detected by 24h ambulatory electrocardiographic monitoring and Colour Dopplerechocardiog rphy beforeand 6 months after taking benazepril in 56 cases of hypertensive patients.Results Theincidences of VAs and Lown's grade ≥3 ve ntricular arrhy thmias were 77.7 % and 48.1 % in 27 cases with LVH, significantly higher than 34.4 % and 10.3 % in 29 cases without LVH (P<0.01).Remarkableregression of IVS, LVPW and LVMI was found after half yeartreatment of benazepril (P<0.05 or 0.01), so did LA (P<0.01).Meanwhile, theincidence of VAs, particularly complexventricular ar rhy thmias was significantly decreased.Conclusion Benazepril has a favorable Effect on hypertnsive left ventricular hypertrophy and ventricular a rrhy thmias.

Key words: benazepril, hypertensive disease, left ventricular hypertrophy, ventricular arrhythmias