Abimanyu, Roni, Andre Pasha Ketaren, and Ali Nafiah Nasution. “Relationship Between Left Atrium Reservoir Strain and One-Year Mortality After Surgery in Patients With Severe Primary Mitral Regurgitation Undergoing Mitral Valve Replacement at Haji Adam Malik General Hospital, Medan”. Journal of Society Medicine 4, no. 2 (February 28, 2025): 60–69. Accessed January 31, 2026. https://www.jsocmed.org/index.php/go/article/view/200.