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A 3-Year Audit of Pre-Operative Transthoracic Echocardiographic Features Of Patients Undergoing Elective Non-Cardiac Surgery In A Tertiary Hospital In South-South Nigeria. JNSRS [Internet]. 2024 Aug. 25 [cited 2026 Sep. 8];1(4):137-44. Available from: https://nsrs.ng/journal/index.php/jnsrs/article/view/22