“…While these surgical techniques appear promising, the data presented in the review article by Sarris-Michopoulos et al is entirely from observational studies. 1 The total number of subjects in these studies is 442 patients. [9][10][11] This is less than aforementioned randomized Watchman trials which enrolled 707 patients in the PROTECT AF, 407 patients in PREVAIL, and 402 patients in PRAGUE-17.…”