Implantable cardioverter defibrillators for sudden cardiac death prevention in China: A regional analysis from the improve SCA clinical trial

Background: The improve sudden cardiac arrest (SCA) study was a nonrandomized prospective global study that identified a subset of primary prevention (PP) patients at an elevated risk for SCA labeled 1.5PP. These 1.5PP patients had one or more of the following additional risk factors: Syncope, nonsustained ventricular tachycardia, premature ventricular contractions >10/h, and left ventricular ejection fraction <25%. The purpose of this...