The effects of verapamil, nifedipine, propranolol, and combinations of nifedipine+propranolol and nifedipine+verapamil were studied in 60 patients with stable angina pectoris. Verapamil was found to have a pronounced antianginal activity against all types of myocardial ischemia, whereas nifedipine relieved mainly painful ischemic episodes. By the end of 12-week therapy with propranolol, the agent lost its antiischemic effect in a third of patients, which was accompanied by an increase in the number and severity of silent ischemic episodes.
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