Preoperative mitral annulus size - Can we get it right?

Area of Science:

• Cardiology
• Cardiac Surgery
• Medical Imaging

Background:

• Mitral valve replacement (MVR) is a common cardiac surgical procedure.
• Accurate sizing of the mitral prosthesis is crucial for optimal patient outcomes.
• Preoperative assessment of cardiac dimensions aids in surgical planning.

Purpose of the Study:

• To investigate the correlation between surgically measured mitral valve size and preoperative/intraoperative echocardiographic cardiac dimensions.
• To determine if mitral prosthesis size can be predicted using these correlations.

Main Methods:

• Retrospective analysis of 180 patients undergoing MVR with TTK Chitra valve.
• Correlation analysis (Pearson) between mitral annulus size and left ventricular internal diameter (systolic and diastolic), left atrial size, aorta size, and body surface area.
• Assessment of mean left ventricular internal diameter in systole (LVIDS) for each prosthetic valve size.

Main Results:

• Significant positive correlations were found between mitral valve size and left ventricular internal diameter (systolic, r=3.3, p<0.01) and left atrial size (r=2.7, p<0.01).
• Moderate correlations were observed with left ventricular internal diameter (diastolic, r=2.5), aorta size (r=1.9), and body surface area (r=1.8).
• A linear relationship was demonstrated between prosthetic valve size and mean LVIDS.

Conclusions:

• Preoperative echocardiographic measurements, particularly left ventricular internal diameter (systolic), show a significant correlation with mitral valve size.
• These findings support the use of echocardiography to predict optimal mitral prosthesis size, potentially improving surgical planning and outcomes.