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The transthoracic aortic cross clamp has been passed through the transverse sinus and deployed. (A) Details of the transverse sinus are shown; (B) the transthoracic cross clamp (XCL) is shown with respect to the cardioplegia needle (CPN). XCL, transthoracic cross clamp; RPA, right pulmonary artery; SVC, superior vena cava; LAA, left atrial appendage; LA, left atrial roof; LM, Left main coronary artery; TVS, transverse sinus.
