ObjectiveTo evaluate the feasibility to use ultrasonic cardiac output monitoring (USCOM) for patients after coronary artery bypass grafting. MethodsClinical data of 32 patients undergoing off-pump coronary artery bypass grafting in General Hospital of Shenyang Military Region between April and June 2013 were retrospectively analyzed. There were 17 male and 15 female patients with their age of 46-76 (63.2±7.6) years. USCOM and pulmonary artery catheterization (PAC) were used to measure cardiac output (CO) synchronously,and the results were compared between USCOM and PAC. ResultsSixty-four pairs of data were collected from those 32 patients. No adverse event was observed with either USCOM or PAC. Mean CO was 4.27±0.92 L/min with USCOM and 4.49±0.75 L/min with PAC respectively,which were not statistically different (P=0.12) but significantly correlated (r=0.84,P<0.001). ConclusionThere is close correlation between USCOM and PAC for CO measurement. USCOM can not only measure CO accurately,but also has the advantages of being noninvasive,easy to perform and low cost.