IJCS | Volume 32, Nº5, September/October 2019

499 Cedenilla et al. Requirements for permanent pacemaker afterTAVI Int J Cardiovasc Sci. 2019;32(5):492-504 Original Article implantation of a self-expanding prosthesis ranges from 22 to 65%, while with the use of a balloon-expandable prosthesis, it ranges from 4 to 30.2%. 34 In the study by Testa et al., the onset of LBBB after TAVI was observed in 43% of the 1,060 patients treated with the CoreValve® prosthesis. According to this author, the presence of LBBB is associated with a higher rate of pacemaker implantation up to 30 days after TAVI. 26 Sixteen of the 53 patients (30.2%) included in this study had a permanent pacemaker implanted during index admission. In a review of 42 studies, the recommendation for pacemaker implantation after TAVI ranged from 4 to 51%. 19 The highest incidence was described by Akin et al. 17 and the lowest one was found in the study by Eltchaninoff et al. 16 The risk factors for the need for a permanent pacemaker after TAVI found in this study in the univariate analysis were: use of CoreValve ® prosthesis, implantation of larger prostheses, QRS complex ≥ 120 ms and first-degree AVB. In this study, all of the 16 Figure 2 - Survival curves of the 53 patients undergoing TAVI and comparison between the survival of patients who developed and who did not develop new conduction disorders. TAVI: transcatheter aortic valve implantation; dis.: disorder. Survival Survival Days of follow up after TAVI Survival Censored Without new conduction disorders With new conduction disorders 0 = censored 1 = censored