Effect of Left Cardiac Sympathetic Denervation on the Electromechanical Window in Patients with either Type 1 or Type 2 Long QT Syndrome: A Pilot Study

Background Left cardiac sympathetic denervation (LCSD) exerts significant antifibrillatory effects in patients with long QT syndrome (LQTS). Recently, electromechanical window (EMW) has emerged as a novel torsadogenic marker in LQTS, superior to QT interval (QTc) in distinguishing symptomatic from asymptomatic patients. Objective To explore the hypothesis that LCSD improves EMW most favorably in patients with LQT1. Design From September 2006 to...