MITRAL ANNULAR EXCURSION IN HEART FAILURE WITH PRESERVED EJECTION FRACTION DURING EXERCISE: THE IMPACT OF A FAULTY CARDIAC PISTON

Mitral annular excursion (MAE) contributes to both longitudinal left ventricular systolic motion and diastolic filling. Inability to augment MAE during exercise may impair systolic efficiency as well as diastolic filling, possibly contributing to exercise intolerance in HFpEF. We hypothesized that