Meta-Analysis of Transcatheter Versus Surgical Aortic Valve Replacement in Low Surgical Risk Patients

Am J Cardiol. 2020 Apr 15;125(8):1230-1238. doi: 10.1016/j.amjcard.2020.01.017. Epub 2020 Jan 28.


Current guidelines recommend transcatheter aortic valve implantation (TAVI) for patients with severe aortic stenosis at elevated surgical risk, but not for patients at low surgical risk. Our objective is to compare major clinical outcomes and procedural complications with TAVI versus surgical aortic valve replacement in patients with severe aortic stenosis at low surgical risk. We conducted a systematic review and meta-analysis of randomized controlled trials, identified through a systematic search of the MEDLINE, Embase, and Cochrane databases. Count data were pooled across trials using random-effects models with inverse variance weighting to obtain relative risks (RRs) and corresponding 95% confidence intervals (CIs). Three randomized controlled trials (n = 2,629) were included. At 30 days, TAVI was associated with a substantial reduction in all-cause mortality (RR: 0.45, 95%CI: 0.20 to 0.99), atrial fibrillation (RR: 0.27, 95%CI: 0.17 to 0.41), life threatening/disabling bleeding (RR: 0.29, 95%CI: 0.12 to 0.69), and acute kidney injury (RR: 0.28, 95%CI: 0.14 to 0.57). The reduction in atrial fibrillation persisted at 12 months (RR: 0.32, 95%CI: 0.21 to 0.49). However, TAVI patients had an increased risk of permanent pacemaker implantation at both 30 days (RR: 3.13, 95%CI: 1.36 to 7.21) and 12 months (RR: 2.99, 95%CI: 1.19 to 7.51). Due to the low absolute numbers of events, results were inconclusive at 30 days and 12 months for cardiovascular mortality, stroke, transient ischemic attack, and myocardial infarction. In conclusion, while some outcomes remained inconclusive, these data suggest that TAVI should be considered as a first-line therapy for the treatment of severe aortic stenosis in low surgical risk patients.

Publication types

  • Comparative Study
  • Meta-Analysis
  • Research Support, Non-U.S. Gov't
  • Systematic Review

MeSH terms

  • Acute Kidney Injury / epidemiology*
  • Aortic Valve Stenosis / surgery*
  • Arrhythmias, Cardiac / epidemiology
  • Arrhythmias, Cardiac / therapy
  • Atrial Fibrillation / epidemiology*
  • Cardiac Pacing, Artificial
  • Cardiovascular Diseases / mortality
  • Cause of Death
  • Heart Valve Prosthesis Implantation / methods
  • Humans
  • Ischemic Attack, Transient / epidemiology
  • Mortality
  • Myocardial Infarction / epidemiology
  • Pacemaker, Artificial / supply & distribution*
  • Postoperative Complications / epidemiology
  • Postoperative Hemorrhage / epidemiology*
  • Prosthesis Implantation / statistics & numerical data
  • Risk Assessment
  • Stroke / epidemiology
  • Transcatheter Aortic Valve Replacement / methods*