PMID- 34673507 OWN - NLM STAT- MEDLINE DCOM- 20221110 LR - 20221122 IS - 1678-9741 (Electronic) IS - 0102-7638 (Print) IS - 0102-7638 (Linking) VI - 37 IP - 5 DP - 2022 Oct 8 TI - High Residual Gradient Following a Self-Expandable Transcatheter Aortic Valve-in-Valve Implantation - Risk Factor Analysis, Outcomes, and Survival. PG - 710-720 LID - 10.21470/1678-9741-2020-0424 [doi] AB - INTRODUCTION: Transcatheter aortic valve-in-valve implantation (TAVI-ViV) can be associated with unfavorable hemodynamic outcomes. This study aimed to estimate the prevalence, identify the risk factors, and evaluate the outcomes and survival of patients with high residual gradients after TAVI-ViV. METHODS: A total of 85 patients were included in the study. The cohort was divided into group A, with postprocedural mean pressure gradient (PG) >/= 20 mmHg, and group B, with mean PG < 20 mmHg. RESULTS: Postprocedural PG >/= 20 mmHg was observed in 24.7% of the patients. In a univariate analysis, preoperative gradient, pre-existing patient-prosthesis mismatch (PPM), deep valve implantation, small degenerated valves, and an older generation of transcatheter aortic valves were found to be risk factors for high residual gradient. Multivariate analysis showed that preexisting maxPG > 60 mmHg, implantation level of 4 mm below neo-annulus, and degenerated valve size