Quality of life improvement in older patients with heart failure initiated on ivabradine: Results from the UK multi-centre LIVE:LIFE prospective cohort study

Abstract

Aims: LIVE:LIFE is a multi-centre, open-label, prospective observational cohort study assessing health-related quality of life (HRQoL) in older patients with chronic heart failure (CHF) following initiation of ivabradine. The primary endpoint is change in Minnesota Living with Heart Failure Questionnaire (MLWHFQ) total score after 6months.

Methods and results: Consenting patients aged ≥70years with CHF, in whom ivabradine was initiated within its licensed indication, were enrolled. Demographic, clinical and HRQoL (MLWHFQ, SF-12) data were collected at baseline (V1), 2 (V2) and 6months (V3). Over 14months, 240 patients were recruited from 44 UK centres. Ninety-nine (41%) were female and 28% aged ≥80years. Aetiology was ischaemic in 152 (63%) and 59% had been diagnosed with CHF for ≤2yrs. 52% of patients were New York Heart Association (NYHA) Class III and 57% had left ventricular ejection fraction <35%. 57% received beta-blockers. Patients had multiple comorbidities (144 (60%) hypertension, 105 (44%) asthma/COPD, 80 (33%) diabetes) and were prescribed a mean of 9±3 daily medications. Resting heart rate was 83bpm at baseline and fell 13bpm by V3. In patients completing both visits (n=187), comparing V3 to baseline: MLWHFQ total score improved by 9 points (p<0.0001, 95% CI: 7-12); 30% of patients improved ≥1 NYHA class and global assessment improved from patient (59%) and physician (60%) perspectives. 88% of patients completing V3 were still taking ivabradine.

Conclusions: These contemporary prospective UK data demonstrate improvements in HRQoL and functional status with ivabradine therapy in typical older CHF patients. Despite comorbidities and polypharmacy, ivabradine was well tolerated.

Keywords: Elderly; HRQoL; Health-related quality of life; Heart failure; Ivabradine; MLWHFQ.