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Estimation of the Aortic Valve Annular Size Measured by Pre-Operative Echocardiogram Validated Against Intra Operative Measurement by Standard Valve Sizers in Patient Undergoing Aortic Valve Replacement Open Heart Surgery. J. Bahria Univ. Med. Dent. Coll. [Internet]. 2026 Apr. 21 [cited 2026 Apr. 23];16(02):627-33. Available from: https://jbumdc.bahria.edu.pk/index.php/jbumdc/article/view/613