Objective: Right ventricular (RV) function is known to be a critical factor to determine postoperative outcome in cardiac surgery, and echocardiography plays an important role in RV function assessment. In the previous studies, RV function was reported to be more reduced in surgical aortic valve replacement (SAVR) than transcatheter aortic valve replacement (TAVR), but its assessment was performed by 2-dimensional echocardiography. On the other hand, three-dimensional (3D) echocardiography has been the gold standard to assess RV systolic function (EF: ejection fraction), and its intraoperative use is getting more useful in cardiac surgery given recent technological advance in echocardiography machines. However, realty is that RV function assessment is based on subjective information or traditional RV function indices, mostly due to unfamiliarity of 3D technique.~In this study, the investigators plan to evaluate intraoperative RV function assessment by 3D transesophageal echocardiography (TEE). The investigators will compare 3D RV EF with other traditional RV function indices (RV size, Right Ventricular Index of Myocardial Performance (RIMP), RV fractional area change (FAC), peak systolic velocity of the lateral tricuspid annulus (S'), tricuspid annular plane systolic excursion (TAPSE), speckle tracking echocardiography (STE) in SAVR, mini-sternotomy AVR (mini AVR), and TAVR.
Three-dimensional echocardiography has become a gold standard to assess right ventricular (RV) function, and investigators plan to use 3D transesophageal echocardiography to assess RV function in 3 types of aortic valve replacement (AVR): surgical AVR (SAVR), mini-sternotomy AVR (mini AVR), and transcatheter AVR (TAVR).