• Tatsuyuki Imada, Takahiko Kamibayashi, Chiho Ota, Sho Carl Shibata, Takeshi Iritakenishi, Yoshiki Sawa, and Yuji Fujino.
• Department of Anesthesiology and Intensive Care Medicine, Osaka University Graduate School of Medicine, Osaka, Japan. Electronic address: imada@anes.med.osaka-u.ac.jp.
• J. Cardiothorac. Vasc. Anesth. 2015 Aug 1; 29 (4): 831-5.

ObjectiveIntraoperative two-dimensional echocardiography is technically challenging, given the unique geometry of the right ventricle (RV). It was hypothesized that the RV fractional area change (RVFAC) could be used as a simple method to evaluate RV function during surgery. Therefore, the correlation between the intraoperative RVFAC and the true right ventricular ejection fraction (RVEF), as measured using newly developed three-dimensional (3D) analysis software, was evaluated.DesignRetrospective study.SettingUniversity hospital.ParticipantsPatients who underwent cardiac surgery with transesophageal echocardiography monitoring between March 2014 and June 2014.InterventionsNone.Measurements And Main ResultsSixty-two patients were included in this study. After the exclusion of poor imaging data and patients with arrhythmias, 54 data sets were analyzed. RVFAC was measured by one anesthesiologist during surgery, and full-volume 3D echocardiographic data were recorded simultaneously. The 3D data were analyzed postoperatively using off-line 3D analysis software by a second anesthesiologist, who was blinded to the RVFAC results. The mean RVFAC was 38.8% ± 8.7%, the mean RVEF was 41.4% ± 8.3%, and there was a good correlation between the RVFAC and the RVEF (r(2) = 0.638; p<0.0001).ConclusionsThe RVFAC was well-correlated with the RVEF calculated using 3D echocardiography; therefore, RVFAC provides a simple and useful method for anesthesiologists to evaluate intraoperative RV function.Copyright © 2015 Elsevier Inc. All rights reserved.

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