“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”. 2026. Journal of Bahria University Medical and Dental College 16 (02): 627-33. https://doi.org/10.51985/.