[2-directional ventricular tachycardia associated with mitral valve prolapse].

We describe the case of a 11 year old male who developed a bidirectional tachycardia associated to mitral valve prolapse as the only evident anatomical anomaly. Simultaneous recordings of surface ECG readings and intracavitary tracings showed left ventricular origin of such tachycardia. In the present study we confirm the site of origin of the arrhythmia and the association between bidirectional tachycardia and mitral valve prolapse.