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Example of a patient with mild ventricular dysfunction (resting left ventricle ejection fraction 49%, exercise left ventricle ejection fraction 46%) who developed severe mitral regurgitation (MR) during exercise. This patient had no MR at rest (left), severe MR developed in the immediate post-exercise period (center), which did not completely disappear until 7 min after exercise (right) (From Peteiro et al[32]).
