Factors affecting left ventricular mass regression after aortic valve replacement with stentless valves

Area of Science:

• Cardiology
• Cardiac Surgery
• Biomedical Engineering

Background:

• Stentless valves offer hemodynamic benefits in aortic valve replacement (AVR).
• Early postoperative reduction in left ventricular (LV) mass and remodeling are observed with these devices.
• Factors influencing LV mass regression post-AVR require further investigation.

Purpose of the Study:

• To examine patient-related and valve-related factors affecting left ventricular mass regression after AVR with stentless porcine valves.
• To identify predictors of LV mass regression at 3 years post-aortic valve replacement.

Main Methods:

• A retrospective study of 1,103 patients undergoing AVR with stentless porcine valves using a subcoronary implant technique.
• Serial echocardiograms assessed valve performance and LV mass index (LVMI).
• Multiple linear regression identified independent predictors of 3-year LVMI.

Main Results:

• Indexed effective orifice area (EOA) correlated with LV mass regression; patients with indexed EOA >0.8 cm²/m² showed significant LVMI reduction (76.3-78.7% of baseline) at 3 years.
• Patients with indexed EOA <0.8 cm²/m² had less regression (95.5% of baseline LVMI).
• Independent predictors of LV mass regression included baseline LVMI, prior myocardial infarction, male gender, and carotid stenosis.

Conclusions:

• Baseline LVMI and patient-prosthetic mismatch are major determinants of LV mass regression post-AVR.
• Optimizing hemodynamic benefits requires careful prosthesis selection to avoid mismatch.
• Early intervention for AVR may lead to more complete LV mass resolution, potentially improving prognosis.