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The CarboMedics supra-annular Top Hat valve improves long-term left ventricular mass regression

Victor X Mosquera1, Alberto Bouzas-Mosquera2, Victor Bautista-Hernandez1

  • 1Department of Cardiac Surgery, Complejo Hospitalario Universitario de A Coruña, A Coruña, Spain.

The Journal of Thoracic and Cardiovascular Surgery
|August 19, 2014
PubMed

Insights

The supra-annular CarboMedics Top Hat valve offers superior hemodynamic performance compared to the intra-annular standard valve, leading to greater left ventricular mass reduction. This valve is recommended for patients with small aortic roots and severe hypertrophy.

Area of Science:

  • Cardiovascular Surgery
  • Biomedical Engineering
  • Cardiac Valve Prosthetics

Background:

  • Aortic valve replacement (AVR) is a common procedure.
  • Small aortic roots and severe myocardial hypertrophy present challenges in AVR.
  • Hemodynamic performance of mechanical valves is crucial for long-term outcomes.

Purpose of the Study:

  • To compare the hemodynamic performance of the supra-annular CarboMedics Top Hat valve and the intra-annular CarboMedics standard valve.
  • To evaluate long-term left ventricular mass reduction and transvalvular gradients.
  • To identify optimal valve choice for specific patient profiles.

Main Methods:

  • Retrospective review of 186 patients undergoing AVR with small mechanical prostheses (2003-2013).
  • Comparison between CarboMedics Top Hat (n=53) and CarboMedics standard (n=133) valves.
  • Analysis of in-hospital mortality, left ventricular mass reduction, aortic gradients, and survival rates.

Main Results:

  • The Top Hat group showed significantly greater left ventricular mass reduction (33% vs. 20.1%, P < .001).
  • The Top Hat group had lower postoperative peak aortic gradients (19.9 vs. 29.6 mm Hg, P < .001).
  • Survival rates were comparable, but severe myocardial hypertrophy was an independent predictor of survival.

Conclusions:

  • The supra-annular Top Hat valve demonstrates superior hemodynamic performance over the intra-annular standard valve.
  • The Top Hat prosthesis is particularly recommended for patients with small aortic roots and severe myocardial hypertrophy.
  • Optimizing valve selection can improve patient outcomes after AVR.
Abstract

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