Nguyen, M.N., Nguyen, S.H., Nguyen, T.M., Le, Q.T., Ngo, T.H. and Pham, V.D.M. 2025. Early results of aortic root enlargement using y-incision technique (yang technique) in Hanoi Heart Hospital. The Vietnam Journal of Cardiovascular and Thoracic Surgery. 52, (Aug. 2025), 244 - 253. DOI:https://doi.org/10.47972/vjcts.v52i.1518.