In the prospective, open-label, non-interventional, multicenter RESPONSIfVE study, the effectiveness, response rates and tolerability of Ivabradine ( Corlentor, Procoralan ) with or without beta blocker were evaluated in patients with chronic stable angina pectoris in daily clinical practice.
In patients with angina pectoris, Ivabradine was given twice daily in flexible doses for 4 months. Resting heart rate ( HR ), number of angina attacks, short-acting nitrate use, severity of symptoms [ by Canadian Cardiovascular Society ( CCS ) score ] and tolerability with or without existing beta-blocker therapy were documented and analyzed using descriptive statistical methods.
In total, 1250 patients with angina pectoris ( mean age 66.0 ± 10.9 years, 59.6% male, 31.9% previous myocardial infarction ) and an indication for Ivabradine were included.
Sixty-five percent of all patients received beta-blockers. Further concomitant standard medication included Aspirin ( 74.2% ), statins ( 69.3% ), angiotensin-converting enzyme inhibitors/angiotensin receptor blockers ( 84.2% ), diuretics ( 40.0% ), long-acting nitrates ( 15.7% ), and calcium antagonists ( 21.4% ).
After 4 months of Ivabradine treatment ( mean daily dose 11.0 ± 2.7 mg ), mean heart rate was reduced from 82.4 ± 11.8 beats per minute ( bpm ) to 67.1 ± 8.4 bpm.
The average number of angina attacks/week decreased from 1.2 ± 1.9 to 0.1 ± 0.6 and the average use of short-acting nitrates/week from 1.5 ± 2.8 units to 0.2 ± 1.0 units.
CCS classification of patients improved from 76% classified in CCS grades II or III and 24% in CCS grade I to 66% classified in CCS grade I and only 35% remaining in CCS grades II or III at study end.
Response rate to Ivabradine ( defined as heart rate less than 70 bpm or heart rate reduction greater than or equal to 10 bpm ) reached 87%.
Heart rate reduction, symptomatic improvement and response rates were comparable in patients with or without beta-blockers.
Adverse drug reactions were reported for 2.2% of patients.
In conclusion, in this prospective study over a four-month period in clinical practice, Ivabradine effectively reduced heart rate, angina attacks, and nitrate consumption in patients with angina pectoris with or without concomitant beta-blocker therapy.
Ivabradine improved CCS scores and achieved a high treatment response rate with good general tolerability. ( Xagena )
Perings S et al, Adv Ther 2016; Epub ahead of print