Non-invasive myocardial work in severe aortic regurgitation: implications for post-operative left ventricular...

Area of Science:

• Cardiology
• Echocardiography
• Cardiac Mechanics

Background:

• Non-invasive myocardial work is an echocardiographic technique to assess left ventricular (LV) function by integrating myocardial deformation and afterload.
• Chronic severe aortic regurgitation (AR) can impact LV function, necessitating evaluation of surgical outcomes.

Purpose of the Study:

• To investigate the association between myocardial work indices and post-operative LV dysfunction in patients with chronic severe AR.
• To determine the predictive value of myocardial work indices for post-operative LV dysfunction.

Main Methods:

• One hundred forty-one patients with chronic severe AR and preserved LV ejection fraction (LVEF) undergoing aortic valve surgery were studied.
• Pre-operative myocardial work indices (LV global work index, LV global constructive work, LV global wasted work, LV global work efficiency) were measured.
• Post-operative LV dysfunction was defined as LVEF < 50% at 12 months.

Main Results:

• Eighteen percent of patients developed post-operative LV dysfunction.
• Patients with post-operative LV dysfunction exhibited lower LV global work index, LV global constructive work, and LV global work efficiency.
• Multivariate analysis identified LV global work index and LV global constructive work as significant predictors of post-operative LV dysfunction.

Conclusions:

• Impaired myocardial work indices are associated with post-operative LV dysfunction in patients with chronic severe AR and preserved LVEF.
• Myocardial work assessment shows potential for risk stratification and guiding surgical decisions in this patient population.