effect of beta-blocking agent on Q-T interval during acute myocardial infarction

ABSTRACT

Twenty patients with acute transmural myocardial infarction without complication were selected for this study. An ECG was done daily for ten successive days for the measurement of the Q-T and Q-T intervals. Patients were classified into two groups Group 1 [10 patients] did not receive beta-blocking agent and group 2 [10 patients] received beta-blocking agent propranolol 40 mg twice daily. The results showed that Q-T interval prolongation occurs in the first few days in group 1, while in group 2 the prolongation of Q-T interval was not statistically significant. The explanations were discussed