Abstract:
AIMS:Ivabradine, a new I(f) inhibitor which acts specifically on the pacemaker activity of the sinoatrial node, is a pure heart rate lowering agent. Ivabradine has shown anti-ischaemic and anti-anginal activity in a placebo-controlled trial. The objective of this study was to compare the anti-anginal and anti-ischaemic effects of ivabradine and the beta-blocker atenolol. METHODS AND RESULTS:In a double-blinded trial, 939 patients with stable angina were randomized to receive ivabradine 5 mg bid for 4 weeks and then either 7.5 or 10 mg bid for 12 weeks or atenolol 50 mg od for 4 weeks and then 100 mg od for 12 weeks. Patients underwent treadmill exercise tests at randomization (M(0)) and after 4 (M(1)) and 16 (M(4)) weeks of therapy. Increases in total exercise duration (TED) at trough at M(4) were 86.8+/-129.0 and 91.7+/-118.8 s with ivabradine 7.5 and 10 mg, respectively and 78.8+/-133.4 s with atenolol 100 mg. Mean differences (SE) when compared with atenolol 100 mg were 10.3 (9.4) and 15.7 (9.5) s in favour of ivabradine 7.5 and 10 mg (P<0.001 for non-inferiority). TED at M(1) improved by 64.2+/-104.0 s with ivabradine 5 mg and by 60.0+/-114.4 s with atenolol 50 mg (P<0.001 for non-inferiority). Non-inferiority of ivabradine was shown at all doses and for all criteria. The number of angina attacks was decreased by two-thirds with both ivabradine and atenolol. CONCLUSION:Ivabradine is as effective as atenolol in patients with stable angina.
journal_name
Eur Heart Jjournal_title
European heart journalauthors
Tardif JC,Ford I,Tendera M,Bourassa MG,Fox K,INITIATIVE Investigators.doi
10.1093/eurheartj/ehi586subject
Has Abstractpub_date
2005-12-01 00:00:00pages
2529-36issue
23eissn
0195-668Xissn
1522-9645pii
ehi586journal_volume
26pub_type
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