To measure preoperative right ventricular function in patients with coronary artery bypass grafting (CABG) by automatic functional imaging (AFI), and to evaluate its value in predicting the risk of short-term adverse events after CABG.

A total of 104 patients who received CABG at Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology and Wuhan Central Hospital from December 2019 to December 2021 were selected to measure left and right ventricular cardiac function parameters by routine echocardiography and AFI, respectively. The patients were divided into an adverse event group (38 cases) or a no adverse event group (66 cases) according to whether adverse events occurred within 30 days after surgery. General data, conventional echocardiographic parameters, and AFI parameters were compared between the two groups. Receiver operating characteristic (ROC) curve analysis was performed to assess the predictive efficiency of ultrasonic parameters for adverse events. Binary logistic regression was used to identify the independent risk factors affecting the prognosis of patients with CABG.

Left ventricular ejection fraction (LVEF), left ventricular global longitudinal strain (LVGLS), right ventricular free wall strain (RVFWLS), and four-chamber right ventricular longitudinal strain (RV4CLS) in the adverse event group were lower than those of the no adverse event group (P<0.05). Right ventricular myocardial function index (RVMPI) in the adverse event group was higher than that of the group without adverse event (P<0.05). ROC curve analysis showed that the area under the ROC curve of RVFWLS was 0.77, with a sensitivity of 74% and specificity of 76% (P<0.05); the area under the ROC curve of RV4CLS was 0.69, with a sensitivity of 61% and specificity of 71% (P<0.05) . Binary logistic regression analysis showed that RVFWLS (odds ratio [OR]: 8.8, P<0.01), RV4CLS (OR: 3.8, P<0.01), LVGLS (OR: 2.5, P=0.04),RVMPI (OR: 4.5, P<0.01), chronic kidney disease (OR: 4.2, P<0.01) , NYHA grade (OR: 3.0, P=0.01), and EuroScore (OR: 2.3, P=0.04) were independent risk factors for the prognosis of patients with CABG.

Automatic myocardial function imaging of the right ventricle can provide rapid, accurate, and reliable parametric information to predict short-term adverse events after CABG. RVFWLS and RV4CLS have good predictive value for patient prognosis. At the same time, clinical indicator parameters cannot be ignored as risk factors for short-term adverse events in CABG patients.