Abstract

DORANTES-SANCHEZ, Margarita; LOPEZ-DELGADO, Amarily; CASTRO-HEVIA, Jesús  and  MENDEZ-ROSABAL, Annerys. Intermittent short QT interval in a patient with sudden cardiac death. Arch. Cardiol. Méx. [online]. 2011, vol.81, n.4, pp.322-326. ISSN 1665-1731.

This paper presents a 21 years-old-male without structural heart disease who was reanimated from a sudden cardiac death event. His familial history included two siblings suddenly dead in their first year of life. The patient had 10 episodes of ventricular tachycardia (some of them were registered). Electrocardiographically abnormalities were an intermittent short QT interval (280 ms), short QTc (320 ms) and a short ST segment. QT interval subsequently returned to a normal range (360 ms or more), while occasionally a length of 335 ms was recorded. The electrophysiological study findings (AH and HV intervals, refractory periods) were normal. The patient refused the implantable cardioverter defibrillator and he is receiving oral amiodarone (200 mg/day). The evolution has been satisfactory along four years. Sequential electrocardiograms are very important to identify patients with an intermittent short QT interval. Shortening of the interval J wave-Tpeak is also relevant. Related arrhythmias could be ventricular tachycardia or fibrillation.

Keywords : QT interval; Sudden cardiac death; Malignant ventricular arrhythmias; Channelopathies; Short QT syndrome; Mexico.

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