Table 1. Search strategy used in the study.

MeSH - medical subject headings; ICD - implantable cardioverter defibrillators

Database	Search strategy
PubMed	"Safety"[MeSH Terms] OR safety[Text Word], efficacy[All Fields], "defibrillators, implantable"[MeSH Terms], "defibrillators, implantable/adverse effects"[Mesh], "arrhythmias, cardiac/diagnosis"[Mesh]
Medical Literature Analysis and Retrieval System Online (MEDLINE)	"Defibrillators, implantable/standards"[Mesh], implantable cardioverter defibrillator[Text Word], "arrhythmias, cardiac/therapy"[Mesh], "defibrillators, implantable/statistics and numerical data"[Mesh]
Web of Science	Implantable cardioverter defibrillators, cardiac arrhythmias, ICD, safety and efficacy
Embase	Safety and efficacy, implantable cardioverter defibrillators, ICD, cardiac arrhythmia