Beta-Adrenergic Blockade in the Treatment of Exercise-Induced Paroxysmal Ventricular Tachycardia

Abstract
The β-adrenergic blocking drug pronethalol was effective in the treatment of a patient with exercise-induced paroxysmal ventricular tachycardia. Adrenergic stimuli are considered important in initiating this arrhythmia. The mode of action of pronethalol is briefly discussed in relation to other antiarrhythmic agents.