Recurrent ventricular tachycardia due to reentry within the bundle branches.

A case of recurrent ventricular paroxysmal tachycardia in a young man without obvious heart disease is described. Posttachycardiac T-wave inversion followed the arrhythmic episodes. Programmed stimulation of the heart in association with intracardiac recordings showed evidence in favor of reentry within the bundle branches and its divisions during tachycardia. A critical prolongation of the H2-V3 interval preceded each paroxysm of tachycardia.