Abbreviations, acronyms & symbols
AMIOVIRT	= Amiodarone versus Implantable Defibrillator Randomized Trial		DEFINITE	= Defibrillators in Non-Ischemic Cardiomyopathy Treatment Evaluation
CAT	= Cardiomyopathy trial		ICD	= Implantable cardioverter-defibrillator
CI	= Confidence interval		LVEF	= Left ventricular ejection fraction
COMPANION	= Comparison of Medical Therapy, Pacing, and Defibrillation in Heart Failure		NYHA	= New York Heart Association
CRT	= Cardiac resynchronization therapy		RCTs	= Randomized clinical trials
CRTD	= Cardiac resynchronization therapy-cardioverter–defibrillator		RRs	= Risk ratios
CT	= Computed tomographic		SCD	= Sudden cardiac death
			SCD-HeFT	= Sudden Cardiac Death in Heart Failure Trial