Repetitive paroxysmal ventricular tachycardia with fusion beats.

Paroxysmal ventricular tachycardia is unfortunately fairly common and is usually associated with serious heart disease and a poor prognosis. Of late, however, attention has been drawn by numerous observers to a rare and apparently benign form where paroxysms of ventricular tachycardia interrupted by normal sinus beats keep on recurring for months or years. In view of the apparent rarity of the repetitive form of paroxysmal ventricular tachycardia and the presence of some unusual features the following case is reported.