Chronic recurrent ventricular tachycardia.

ai Chronic recurrent ventricular tachycardia Chronic recurrent ventricular tachycardia is always a serious arrhythmia since it may deteriorate into fatal ventricular fibrillation.Chronic recurrent ventricular tachycardia at a rate of 250 beats/minute may cause syncope, but at a rate of 100-150 may not cause any symptoms.Often, but not always, a signal to serious underlying heart disease, the arrhythmia may recur or may disappear as mysteriously as it came.Treatment usually demands long-term drugs, and control may prove difficult.Chronic recurrent ventricular tachycardia may complicate ischaemic heart disease and almost any heart-muscle disease.It is more likely when the QT interval is prolonged, when both recurrence and conversion to ventricular fibrillation may be encouraged by quinidine-like antiarrhythmic drugs that further prolong repolarisation.Chronic recurrent ventricular tachycardia seems to have become more common-possibly as a result of increased survival of patients after myocardial infarction.