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Predicting patient-prosthesis mismatch by aortic root evaluation before aortic valve replacement.

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Summary
This summary is machine-generated.

Patient-prosthesis mismatch (PPM) is more common after surgical aortic valve replacement (SAVR) than transcatheter aortic valve replacement (TAVR). A small sinotubular junction identified by CT predicts PPM in SAVR patients.

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aortic valve stenosismultislice computed tomographypatient-prosthesis mismatch

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Area of Science:

  • Cardiology
  • Cardiac Surgery
  • Medical Imaging

Background:

  • Patient-prosthesis mismatch (PPM) can impact outcomes after aortic valve replacement.
  • Preoperative assessment of anatomical factors is crucial for predicting PPM.
  • Computed tomography (CT) offers detailed anatomical insights before valve replacement procedures.

Purpose of the Study:

  • To identify predictors of PPM after surgical aortic valve replacement (SAVR) and transcatheter aortic valve replacement (TAVR).
  • To compare the incidence of PPM between SAVR and TAVR.
  • To evaluate the role of preoperative CT in predicting PPM.

Main Methods:

  • A cohort of 323 patients undergoing SAVR (n=85) or TAVR (n=238) for aortic stenosis was studied.
  • Preoperative CT was used to assess anatomical predictors, including sinotubular junction dimensions.
  • Patient-prosthesis mismatch was defined as an effective orifice area index <0.85 cm²/m².
  • Propensity score matching was employed to compare hemodynamic performance and PPM incidence between SAVR and TAVR groups.

Main Results:

  • The incidence of PPM was significantly higher in the SAVR group (24.7%) compared to the TAVR group (7.1%).
  • A small sinotubular junction, identified by CT, was an independent predictor of PPM in SAVR patients (OR, 0.79; P=.015).
  • In patients with a small sinotubular junction, PPM prevalence was substantially higher in the SAVR arm (57.9%) versus TAVR (2.9%).
  • After propensity score matching, PPM incidence remained higher in SAVR (26.3%) than TAVR (12.5%).

Conclusions:

  • A small sinotubular junction, detected via preoperative CT, is a significant predictor of PPM in patients undergoing SAVR.
  • The incidence of PPM is higher following SAVR compared to TAVR, particularly in individuals with a small sinotubular junction.