Abstract:
BACKGROUND:beta-blocker therapy for dilated or ischemic cardiomyopathy is now an accepted and effective treatment. However, little is known about its efficacy in patients with postoperative impaired left ventricular function. This retrospective study was designed to assess the effects of beta-blocker therapy in patients after aortic valve replacement (AVR) for aortic regurgitation (AR). METHODS:A total of 59 patients who underwent AVR for chronic AR were assigned to four groups. Twelve patients were treated with both ACE inhibitors and beta-blockers, 12 patients with only ACE inhibitors, eight patients with only beta-blockers, and 27 patients without beta-blockers or ACE inhibitors. A postoperative echocardiographic study was performed one year after surgery. RESULTS:The heart rate was significantly reduced in patients with beta-blockers despite the use of ACE inhibitors after surgery. Postoperative left ventricular volume was more significantly decreased in beta patients than in non-beta patients despite the use of ACE inhibitors. There were also significant reductions in left ventricular mass index in ACE+beta patients compared to ACE+non-beta patients. However, there were no significant differences in NYHA functional class and survival rate between beta patients and non-beta patients. CONCLUSIONS:beta-blocker therapy may improve cardiac performance by reducing cardiac volume and mass in patients with impaired LV function after AVR for AR.
journal_name
Int J Cardioljournal_title
International journal of cardiologyauthors
Matsuyama K,Ueda Y,Ogino H,Sugita T,Sakakibara Y,Matsubayashi K,Nomoto T,Yoshimura S,Yoshioka Tdoi
10.1016/s0167-5273(99)00215-6subject
Has Abstractpub_date
2000-03-31 00:00:00pages
49-53issue
1eissn
0167-5273issn
1874-1754pii
S0167-5273(99)00215-6journal_volume
73pub_type
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