Impact of aortic valve replacement in symptomatic low-risk patients with less than severe aortic stenosis

Saki Ito, Roger Laham, Vuyisile T. Nkomo, John K. Forrest, Michael J. Reardon, Stephen H. Little, Mubashir Mumtaz, Hemal Gada, Tanvir Bajwa, David Langholz, John Heiser, Atul Chawla, Bart Jenson, Guilherme Attizanni, Alan H. Markowitz, Jian Huang, Jae K. Oh

Research output: Contribution to journalArticlepeer-review


OBJECTIVE: To evaluate whether transcatheter or surgical aortic valve replacement (TAVR or SAVR) affects clinical and haemodynamic outcomes in symptomatic patients with moderately-severe aortic stenosis (AS).

METHODS: Echocardiographic evidence of severe AS for enrolment in the Evolut Low Risk trial was based on site-reported measurements. For this post hoc analysis, core laboratory measurements identified patients with symptomatic moderately-severe AS (1.0<aortic valve area (AVA)<1.5 cm 2, 3.0<peak velocity<4.0 m/s and 20≤mean gradient (MG) <40 mm Hg). Clinical outcomes were reported through 2 years.

RESULTS: Moderately-severe AS was identified in 113 out of 1414 patients (8%). Baseline AVA was 1.1±0.1 cm 2, peak velocity 3.7±0.2 m/s, MG 32.7±4.8 mm Hg and aortic valve calcium volume 588 (364, 815) mm 3. Valve haemodynamics improved following TAVR (AVA 2.5±0.7 cm 2, peak velocity 1.9±0.5 m/s and MG 8.4±4.8 mm Hg; p<0.001 for all) and SAVR (AVA 2.0±0.6 cm 2, peak velocity 2.1±0.4 m/s and MG 10.0±3.4 mm Hg; p<0.001 for all). At 24 months, the rates of death or disabling stroke were similar (TAVR 7.7% vs SAVR 6.5%; p=0.82). Kansas City Cardiomyopathy Questionnaire overall summary score assessing quality of life improved from baseline to 30 days after TAVR (67.0±20.6 to 89.3±13.4; p<0.001) and SAVR (67.5±19.6 to 78.3±22.3; p=0.001).

CONCLUSIONS: In symptomatic patients with moderately-severe AS, AVR appears to be beneficial. Determination of the clinical and haemodynamic profile of patients who can benefit from earlier isolated AVR needs further investigation in randomised clinical trials.

Original languageEnglish (US)
Article numbere002297
JournalOpen Heart
Issue number1
StatePublished - May 12 2023


  • Aortic Valve Stenosis
  • Heart Valve Diseases
  • Transcatheter Aortic Valve Replacement
  • Aortic Valve Stenosis/diagnostic imaging
  • Heart Valve Prosthesis Implantation/adverse effects
  • Humans
  • Quality of Life
  • Treatment Outcome
  • Aortic Valve/diagnostic imaging

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine


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