Search strategy
This meta-analysis was conducted in compliance with the Preferred
Reporting Items for Systematic reviews and Meta-analysis (PRISMA), and
we have registered this work online at its inception on PROSPERO to
minimize duplicate efforts.
We searched the Embase, PubMed and Cochrane CENTRAL from the inception
dates to May 2020, using the key words: (((heart failure) or (Cardiac
Failure) or (Heart Decompensation)) and ((Cardiac resynchronization
therapy) or (CRT)) AND ((Defibrillator) OR (Defibrillation) OR
(CRT-D))). There was no language restrictions and the literatures were
searched by one researcher. We also checked the bibliographies of
potentially relevant studies and reviews for additional studies.