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13.
Ivabradine and outcomes in chronic heart failure (SHIFT) : a randomised placebo-controlled study
Swedberg, Karl ...
Background: Chronic heart failure is associated with high mortality and morbidity. Raised resting heart rate is a risk factor for adverse outcomes. Weaimed to assess the effect of heart-rate ...reduction by the selective sinus-node inhibitor ivabradine on outcomes in heart failure. Methods: Patients were eligible for participation in this randomised, double-blind, placebo-controlled, parallel-group study if they had symptomatic heart failure and a left-ventricular ejection fraction of 35% or lower, were in sinus rhythm with heart rate 70 beats per min or higher, had been admitted tohospital for heart failure within the previous year, and were on stable background treatment including a beta blocker if tolerated. Patients were randomly assigned by computer-generated allocation schedule to ivabradine titrated to a maximum of 7.5 mg twice daily or matching placebo. Patients and investigators were masked to treatment allocation. The primary endpoint was the composite of cardiovascular death or hospital admission for worsening heart failure. Analysis was by intention to treat. This trial is registered, number ISRCTN70429960. Findings: 6558 patients were randomly assigned to treatment groups (3268 ivabradine, 3290 placebo). Data were available for analysis for 3241 patients in the ivabradine group and 3264 patients allocatedplacebo. Median follow-up was 22.9 (IQR 18-28) months. 793 (24%) patients in the ivabradine group and 937 (29%) of those taking placebo had a primary endpoint event (HR 0.82, 95% CI 0.75-0.90, p<0.0001). The effects weredriven mainly by hospital admissions for worsening heart failure (672 [21%] placebo vs 514 š16%đ ivabradine; HR 0.74, 0.66-0.83; p<0.0001) and deaths due to heart failure (151 [5%] vs 113 [3%]; HR 0.74, 0.58-0.94, p=0.014). Fewer serious adverse events occurred in the ivabradine group (3388 events) than in the placebo group (3847; p=0.025). (Abs. trunc. at 2000 ch.)
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