Sahan, Suzan, Murat Karamanlioglu, and Ekrem Sahan. “Relationship Between Mitral Annular Calcification and First Degree Atrioventricular Block in Elderly”. Annals of Medical Research 30, no. 8 (August 25, 2023): 905–909. Accessed July 22, 2024. http://annalsmedres.org/index.php/aomr/article/view/4482.