Left ventricular electrical delay can differentiate between ventricular and supraventricular tachycardia in cardiac resynchronization devices

Abstract

We present an illustrative case of a patient known with both supraventricular and ventricular tachycardias. Ventricular tachycardia was characterized by 1:1 retrograde ventriculo-atrial conduction and it was difficult to differentiate supraventricular and ventricular tachycardias that were stored by her cardiac resynchronization defibrillator. Left ventricular electrical delay could differentiate between both arrhythmias. This measurement could be included in future devices for enhanced specificity of ventricular tachycardia detection.