“…Generally, all these studies covered aspects on effectiveness and/or safety and/or compliance and/or on optimization of WCD use in different indications and contexts. Eighteen studies were retrospective [7,8,18,20,21,25,27,32,36,38,42,47,49,50,[51][52][53][54], and 7 studies were prospective [11,15,17,22,30,39,57]. One study was a multicenter, randomized, controlled trial where eligible participants with a previous MI were randomly assigned in a 2:1 ratio to receive a WCD plus guideline-directed medical therapy (the device group) or to receive guideline directed medical therapy alone (the control group), at hospital discharge [5].…”