[The antiarrhythmic effect of metoprolol (author's transl)].

The antiarrhythmic effect of metoprolol after chronic treatment has been evaluated by 24 hour Holter monitoring in 16 patients with several premature ventricular beats and in 14 patients with chronic atrial fibrillation and compared with the effect of a placebo. Metoprolol induced a mean decrease of heart rate of 14.5% in the 16 patients and reduced the mean value/min of the ventricular premature beats of the 51.

Comparison of five different stress testing methods in the ECG diagnosis of coronary artery disease. Correlation with coronary arteriography.

Five different stress testing methods: bicycle ergometer exercise (BE), treadmill exercise (TD), isoproterenol infusion test (IPN), dopamine infusion test (DPM), and atrial pacing (AP), were performed on 90 male patients who underwent coronary arteriography. Ischemic S-T segment depression of 1.0 mm or greater was used as the criterion for a positive test.