Mitral Regurgitation: Current Treatment Options and Their Selection

Area of Science:

• Cardiology
• Cardiac Surgery
• Hemodynamics

Background:

• Mitral regurgitation (MR) is a complex heart valve abnormality with diverse causes.
• Severe MR can lead to heart failure and death, while milder forms may impact longevity and increase risks of thromboembolism and infection.
• Current management for severe MR primarily involves surgical intervention.

Purpose of the Study:

• To review the current understanding and management strategies for mitral regurgitation.
• To discuss the indications for surgical intervention in severe MR, including symptomatic and asymptomatic patients.
• To address the controversies surrounding surgical decisions, particularly in cases of ischemic MR and during coronary artery bypass grafting.

Main Methods:

• Literature review of current guidelines and clinical evidence regarding mitral regurgitation.
• Analysis of factors influencing surgical decision-making for severe MR.
• Evaluation of the role of medical therapy in managing MR.

Main Results:

• Surgical valve repair or replacement is the standard treatment for severe MR.
• Indications for surgery generally include symptoms, ventricular dysfunction, or specific geometric changes, but low surgical risk prompts consideration even in asymptomatic patients.
• Medical therapy is primarily for symptom management when surgery is contraindicated and does not alter MR outcomes or preserve myocardial function prophylactically.

Conclusions:

• Management of mitral regurgitation requires careful consideration of severity, patient symptoms, ventricular function, and surgical risk.
• Surgical intervention is indicated for severe MR based on established criteria, with ongoing debate regarding its application in specific scenarios.
• Medical management plays a supportive role, particularly for symptom relief in non-surgical candidates.