Study of the metabolic effects of bunitrolol (Koe 1366) in angina induced by catecholamine infusion.

In ten angina patients responding with a myocardial anaerobic metabolic pattern to isoproterenol infusion, a new beta-blocking agent, bunitrolol, was effective in normalizing the myocardial lactate extraction ratio. The correlation with lipid metabolism was also interesting because beta-blocker action reduced significantly arterial non-esterified fatty acids (NEFA) level as well as myocardial NEFA extraction. The metabolic behavior suggests the effectiveness of bunitrolol in the treatment of ischemic heart disease.