Change in Functional Moderate Mitral Regurgitation after Aortic Valve Replacement

Area of Science:

• Cardiology
• Cardiac Surgery
• Echocardiography

Background:

• Aortic stenosis (AS) often coexists with moderate mitral regurgitation (MR).
• Aortic valve replacement (AVR) is a standard treatment for severe AS.

Purpose of the Study:

• To evaluate changes in mitral valve geometry and moderate MR after AVR in patients with AS.
• To assess the impact of AVR on mitral annulus dimensions and MR severity.

Main Methods:

• Retrospective analysis of 49 patients with pure AS and moderate MR undergoing AVR.
• Intraoperative transesophageal echocardiography (TEE) and postoperative transthoracic echocardiography (TTE) were used.
• Midterm follow-up TTE was performed with a mean follow-up of 40.21 months.

Main Results:

• Significant reduction in mitral annular dimensions (anterolateral-posteromedial diameter, anterior-posterior diameter, annular area) post-AVR.
• Significant reduction in the degree of mitral regurgitation (MR) before discharge and at midterm follow-up.
• No significant changes in intraoperative left ventricular loading conditions were observed.

Conclusions:

• AVR reduces MR through mechanical compression of the mitral annulus and ventricular remodeling.
• Patients with AS and moderate MR, particularly younger individuals, may benefit significantly from early AVR.
• AVR is effective in improving mitral valve function in selected AS patients.