Ventricular tachycardia in 4 patients evaluated by programmed electrical stimulation of heart and treated in 2 patients by surgical division of anterior radiation of left bundle-branch.

Electrophysiological studies in patients with chronic recurrent ventricular tachycardia.

“…From the epicardial mapping studies during the tachycardia, they concluded that part of re-entrant circuit probably involved the bundle branches. 6 Guerot et al 8 reported a case where the initiation of ventricular tachycardia by a single atrial premature beat was dependent upon the occurrence of the functional right bundle branch block of the conducted atrial beat, suggesting reentry within bundle branches. Recently, Touboul et al9 reported a patient in whom ventricular tachycardia could be induced by rapid atrial pacing and single timed atrial and ventricular premature beats.…”

Sustained ventricular tachycardia: role of the 12-lead electrocardiogram in localizing site of origin.

“…Twelve-lead ECGs were available during 41 morphologically distinct ventricular tachycardias in 34 patients. The remaining 20 patients had only two or three simultaneous electrocardiographic lead recordings during ventricular tachycardia and were excluded from the study. Thirty of the 34 patients had organic heart disease.…”

Initiation of sustained ventricular tachyarrhythmias in a canine model of chronic myocardial infarction: importance of the site of stimulation.

“…[1][2][3][4] The application of programmed electrical stimulation for these purposes has been based on the premise that the sustained ventricular tachyarrhythmias initiated in the catheterization laboratory relate directly to dysrhythmias that occur clinically.3 ' 5, 6, 8, 13, 15 In clinical practice, however, electrophysiologic studies have not always been completely successful.3' 8, 16, 1 Sustained ventricular tachyarrhythmias (i.e., . 1 minute in duration) may have multiple mechanisms, and some dysrhythmias may not be amenable to initiation using routine programmed pacing techniques.…”