Butts, Brittany Reduced Left Atrial Emptying Fraction and Chymase Activation in Pathophysiology of Primary Mitral Regurgitation. [electronic resource] - JACC. Basic to translational science Feb 2020 - 109-122 p. digital Publication Type: Journal Article ISSN: 2452-302X Standard No.: 10.1016/j.jacbts.2019.11.006 doi