Asymptomatic aortic regurgitation: indications for operation

Area of Science:

• Cardiology
• Cardiac Surgery

Background:

• Left ventricular (LV) systolic function significantly impacts long-term prognosis in chronic aortic regurgitation (AR).
• Preoperative LV dysfunction in patients undergoing aortic valve replacement (AVR) increases risks of postoperative heart failure and mortality.

Purpose of the Study:

• To stratify risk in patients with preoperative LV dysfunction and guide AVR timing.
• To identify asymptomatic patients who benefit from early AVR despite normal ejection fraction.

Main Methods:

• Risk stratification based on symptom severity, exercise intolerance, and duration of LV dysfunction.
• Echocardiographic assessment of LV dimensions and function during serial follow-up.
• Identification of patients at risk for sudden death based on extreme LV dilatation.

Main Results:

• Asymptomatic patients with impaired LV function should undergo AVR promptly.
• Asymptomatic patients with normal LV function have an excellent prognosis with <0.5% annual mortality and <4% annual need for AVR.
• Predictors for future AVR include age, LV dilatation severity, and changes in LV dimensions or ejection fraction.

Conclusions:

• Early AVR is crucial for asymptomatic patients with impaired LV systolic function in chronic AR.
• Conservative management is suitable for asymptomatic patients with normal LV function and excellent long-term outcomes.
• Risk stratification using echocardiography and clinical factors aids in timely AVR decisions and prevention of sudden death.