Late survival and heart failure after transcatheter aortic valve implantation.

BACKGROUND: Short-term survival in patients undergoing transcatheter aortic valve implantation is favorable. Our aim was to evaluate late survival and composite clinical endpoints specified by the Valve Academic Research Consortium-2, including rehospitalization for congestive heart failure.

METHODS: Between January 2008 and April 2014, 166 consecutive patients with severe symptomatic aortic stenosis underwent 168 transcatheter aortic valve implantation procedures at our facility. This cohort was compared with propensity score-matched aortic valve replacement patients. Event rates were estimated by the Kaplan-Meier method and compared using the log-rank test. Cox regression analysis was performed to determine predictors of outcome.

RESULTS: Although 30-day mortality rates following both procedures were similar (4.2% and 4.8%; p = 0.81), significant differences were seen in corresponding rates of survival (51.7% ± 5.8% vs. 72.3% ± 4.3%; p < 0.001) and cumulative rehospitalization for congestive heart failure (41.3% ± 7.2% vs. 23% ± 4.3%; p = 0.006). New York Heart Association functional class IV preoperative status was an independent risk factor for rehospitalization due to congestive heart failure (p = 0.015).

CONCLUSIONS: This study confirms the merit of transcatheter aortic valve implantation in high-risk patients with aortic stenosis, although late survival proved inferior to that of aortic valve replacement in propensity score-matched subjects. Early safety was excellent for both treatment groups, however, patients undergoing transcatheter aortic valve implantation had a higher incidence of rehospitalization for congestive heart failure and myocardial infarction during follow-up. Patients with severe congestive heart failure should be carefully monitored and aggressively treated to improve outcomes.