Myocardial Dysfunction in Primary Mitral Regurgitation: A Review.

Area of Science:

• Cardiology
• Cardiac Surgery
• Valvular Heart Disease

Background:

• Primary mitral regurgitation (MR) is a common valvular heart disease.
• Current guidelines recommend intervention for severe MR with symptoms, LV enlargement, or dysfunction.
• A survival penalty may exist when delaying surgery for guideline indications.

Purpose of the Study:

• To explore novel markers for optimizing surgical timing in primary MR.
• To refine current guidelines for improved patient outcomes.
• To investigate the role of emerging parameters in surgical decision-making.

Main Methods:

• Echocardiography for MR severity assessment.
• Cardiac magnetic resonance (CMR) as a complementary tool.
• Evaluation of LV size, function, and serial changes.
• Consideration of new-onset atrial fibrillation, LA enlargement, pulmonary hypertension, and exercise-induced LV dysfunction.

Main Results:

• Comprehensive assessment of MR severity is critical.
• LV size and function are crucial for surgical timing.
• Novel markers like global longitudinal strain and biomarkers show potential.
• Emerging parameters require further investigation for validation.

Conclusions:

• A refined approach is needed for optimal surgical timing in primary MR.
• Incorporating extravalvular injury and novel markers is essential.
• Further research will validate emerging parameters and refine guidelines.
• Optimizing surgical timing can improve patient outcomes.