| Abstrakt: |
The study was aimed to assess the efficacy and safety of treating coronary heart disease (CHD) patients complicated with COPD using the combination of tolerable doses of -blocker bisoprolol and inhibitor If-channel ivabradine, compared with bisoprolol alone. A total of 50 patients were included (88% men, mean age 62.8+/-7.2 years) with stable angina and clinical signs of bronchoobstruction (84% with COPD and 16% with bronchial asthma in remission phase). At the study start, all patients received bisoprolol, the dose of which was titrated until the clinical signs of intolerance (most common - bronchoobstruction) appeared or worsened. Average dose of bisoprolol at the time of forced titration stop was 6.3+/-2.2 mg/day, mean heart rate (HR) decreased from 82.1+/-8.4 to 72.2+/-8.5 bpm. Then, the patients were randomized into two groups: patients of the first group (n=25) continued to take bisoprolol in tolerable dose, and patients of the second group were added ivabradine (5-15 mg, mean dose 10.7+/- 3.1 mg/day). In contrast to the bisoprolol alone, combination therapy resulted in further decrease of HR to an average of 62.6+/-4.1 bpm over 6 month of follow-up. This was associated with additional decrease of the number of angina attacks (by 4.68+/-4.40 per week vs. 2.48+/-4.70, <0.05), nitrates consumption (by 206.0+/-153.6 mg/week vs. 95.6+/-134.2 mg/week, <0.01) and score of negative components of quality of life (by 5.16+/-3.3 vs. 2.24+/-4.5, <0.05), compared with the first group, respectively. In combination therapy group there was also the decrease of the inhaled broncholytics consumption (from 2.88+/-3.23 to 1.88+/-2.65 per week, <0.05), that was not evident in the first group. Average number of hospitalizations per 1 patient decreased over 6 months of follow-up, compared to the same period before the trial, in both groups, but more prominently in the combination therapy group (-0.31+/-0.55 vs. -0.56+/-0.76, accordingly, <0.1). Therefore, in the treatment of patients with CHD, stable angina and concomitant bronchoobsrtuctive manifestations, if not possible to administer -blockers in the adequate HR-reducing dose, the addition of ivabradine to the treatment could be the treatment of choice. The combination of tolerable doses of bisoprolol and ivabradine is s afe and allows to achieve adequate HR decrease. This is a ssociated with maximal antianginal effect, decrease in the need for broncholytic therapy, improvement of the quality of life and decrease of the number of hospitalizations, compared with the treatment with bisoprolol alone. |
