[Comparison of carvedilol and atenolol efficacy in patients with stable effort angina].

AIM: To compare effectiveness of carvedilol--beta-adrenoblocker with vasodilating action--with atenolol which is beta-adrenoblocker having no vasodilating activity in coronary heart disease (CHD) patients with stable effort angina. MATERIAL AND METHODS: The trial entered 28 CHD patients with a history of myocardial infarction (MI). All the patients had no contraindications to beta-adrenoblockers, had positive exercise tolerance test. After the control period of 7-10 days the patients received either carvedilol (14 patients) or atenolol (14 patients) in a mean daily dose 20.5 mg (6.25 to 50 mg) and 25.9 mg (12.5 to 100 mg), respectively, twice a day. The course of the treatment took 4 weeks. The effect was evaluated at treadmill exercise test. RESULTS: Both drugs diminished heart rate, carvedilol was less effective in this respect. Both drugs significantly prolonged time of exercise to the anginal attack and ST depression by 1.0 mm. Side effects arose in 6 and 4 patients, respectively. CONCLUSION: Carvedilol and atenolol are equally effective in the treatment of stable effort angina.