highly significantp < 0.002
35 One randomized trial (RCT) was performed on 60 patients in 1992, with a highly significant benefit of pacing being shown ( p < 0.002), 36 with a second RCT by another group in 2007 serving to confirm the earlier results. 37 CSS became fully accepted as having a strong indication for pacing and is classified as a Class 1 indication, level of evidence B in the current ESC Guideli