Effect of lobectomy on right heart function evaluated by ultrasound speckle tracking technique
Objective To assessed the changing patterns of right heart function in patients undergoing lobectomy by using two-dimensional echocardiographic speckle tracking technique (2D-STI) and three-dimensional echocardiographic speckle tracking technique (3D-STI). Methods Seventy-seven patients who underwent lobectomy in the Department of Thoracic Surgery of the First Hospital Affiliated to the University of Science and Technology of China (Anhui Provincial Hospital) from March 2021 to March 2022 were included, and 45 patients completed follow-up, all of whom underwent conventional echocardiography, 2D-STI and 3D-STI, and real-time 3D echocardiography was used to capture the cardiac full-volume images of patients who had undergone lobectomy, and offline analysis of the TomTec imaging system was used to compare the differences in each examination parameter before and 1, 3, 6 months after surgery. Results Lobectomy affects the right heart of patients more than the left heart. 2D-STI technology is more sensitive to the assessment of right heart function in patients undergoing lobectomy than 3D-STI technology, and lobectomy affects the right ventricular free wall of patients more than the septal side. Compared with the preoperative period, the absolute value of 2D right ventricular longitudinal strains was reduced in at 1 and 3 months after surgery, with a statistically significant difference (P<0.05), and basically restored to the preoperative level at 6 months after surgery. Compared with the preoperative period, the absolute values of 2D right ventricular free wall longitudinal strain and 3D right ventricular free wall longitudinal strain were reduced at 1 and 3 months after surgery, and the difference was statistically significant (P<0.05), and the preoperative level was basically restored at 3 months after surgery. There was no statistically significant difference in 3D right ventricular septal lateral strain between postoperative 1, 3, 6 months and preoperative (P>0.05). Conclusion Lobectomy reduces right heart systolic function, most significantly at 1 month postoperatively, and returns essentially to preoperative levels at 6 months postoperatively.
echocardiographymyocardial strain analysis techniquelobectomyright ventricular function
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