LQTS	Long QT syndrome
ECG	Electrocardiography
VA	Ventricular arrhythmias
SCD	Sudden cardiac death
HR	Heart rate
QTc	Corrected QT interval
LQT1	LQTS type 1
LQT2	LQTS type 2
LD LQT3	LQTS type 3
LA	Left atrium
EMW	Electromechanical window
TTE	Transthoracic echocardiographic
STE	Speckle-tracking echocardiography
ICD	Implantable cardioverter defibrillator
LV	Left ventricle
GLS	Global longitudinal strain
CMR	Cardiac magnetic resonance
LCSD	Left cardiac sympathetic denervation