Boudiaf E, abdelbaki M, AMRANE. M. Valve Surgery After the Age Of 70: Evaluation Risk Factors for Hospital Mortality. clin. med. & helt. res. jour. [Internet]. 2024 Feb. 21 [cited 2024 Dec. 22];4(1):795-7. Available from: https://cmhrj.com/index.php/cmhrj/article/view/316