Predictors of permanent pacemaker insertion following transcatheter aortic valve replacement with the corevalve revalving system based on computed tomography analysis: An asian multicenter registry study

Background. To determine predictive variables for permanent pacemaker (PPM) insertion after transcatheter aortic valve replacement (TAVR) with the CoreValve Revalving System (CRS). Methods and Results. A total of 121 patients with severe aortic stenosis (AS) were recruited from six Asian medical centers between March 2010 and May 2013. Four patients with preexisting PPM were excluded. The mean age of the remaining 117 patients was 81.2 ± 5.1 years. Twenty-three patients (19.7%) required post-TAVR PPM, with a median time-to-insertion of 7 days (interquartile range, 5-13 days). Two variables were identified as independent predictors of PPM: (1) device depth from the non-coronary cusp (NCC) (odds ratio [OR], 1.263; P=.02) determined by aortic root angiography; and (2) the perimeter stretching index (OR, 1.584; P<.001) determined by computed tomography. The predictive cut-off values were as follows: a perimeter stretching index >1.13 (P<.001) and a device depth from the NCC >7.8 mm (P<.001). The diagnostic accuracy of these variables was 93.2% and 71%, respectively. Conclusion. Depth of the device from the NCC and the perimeter stretching index are independent predictors of PPM insertion after CRS-TAVR.