Mitral valve geometry changes in patients with aortic regurgitation

Area of Science:

• Cardiology
• Cardiac Surgery
• Echocardiography

Background:

• Secondary mitral regurgitation (MR) in patients with aortic regurgitation (AR) is not well understood.
• Assessing mitral valve geometry in moderate to severe AR patients is crucial for surgical planning.

Purpose of the Study:

• To determine the prevalence of significant secondary MR (grade ≥ 2) in patients with moderate to severe AR undergoing aortic valve and root surgery.
• To evaluate the mitral valve geometry characteristics in these patients.

Main Methods:

• Retrospective evaluation of 120 patients undergoing aortic valve and root surgery for AR (grade ≥ 2).
• Preoperative transthoracic echocardiography used to assess MR grade and mitral valve geometry.
• Comparison of left ventricular (LV) dimensions and mitral valve geometry between patients with and without significant MR.

Main Results:

• 23% of patients had significant MR (grade ≥ 2).
• Patients with MR had larger tenting areas, increased inter-papillary muscle distances, larger left atria, and lower LV ejection fractions.
• Multivariate analysis identified lower LV ejection fraction and larger indexed left atrial volume as independent predictors of MR.

Conclusions:

• The prevalence of significant secondary MR in this cohort was 23%.
• Lower LV ejection fraction and larger left atrial volume are independently associated with secondary MR in patients with severe AR.