Quantitative Evaluation Of Left And Right Ventricular Early Systolic Function By Speckle Tracking Echocardiography In Patients With Lung Resections

Part 1 Quantitative Evaluation of Right Ventricular Systolic Function by Speckle Tracking Echocardiography in Patients with Lung ResectionsObjective To evaluate the changes of right ventricular peak systolic strain using speckle tracking echocardiography after lung resections.Methods Seven patients undergoing pneumonectomy and 23 receiving lobectomy were accessed before surgery and 1 week postoperatively. The apical four chamber view of left ventriclar and right ventriclar short-axis view with high frame rate at the levels of papillary muscle were recorded. Longitudinal, circumferential and radial strains measured were in both the interventricular septum and the right ventricular free wall (RVFW) by 2-dimensional strain analysis software. The preoperative values and postoperative ones were compared. Values were compared between the two groups.Results (1) All parameters were lower significantly undergoing lung resections in patients (P < 0.05). (2)There was no significant difference between the two groups before surgery in all parameters (P>0.05). In the lobectomy group RVFW basal and mid segments of longitudinal peak systolic strain and right ventriclar longitudinal global peak systolic strain were significantly higher than those in the pneumonectomy group 1 week postoperatively(P < 0.05), but the difference between the rest was not significant(P>0.05). Conclusion Speckle tracking echocardiography can accurately quantify the right ventricular systolic funtion. The dysfunction of right ventricular are clearly evident lower in the early postoperative period. The more lung resections are, the lower the RVFW longitudinal peak systolic strain and RV longitudinal global peak systolic strain can be.Part 2 Speckle tracking echocardiography for the evaluation after lung resections of regional and global of left ventricular early functionObjective To quantify undergoing lung resections global wall strain and left ventricular systolic function regional with speckle tracking echocardiography in patients.Methods Before surgery and 1 week postoperatively seven patients undergoing pneumonectomy and 26 receiving lobectomy were evaluated with speckle tracking echocardiography. The standard were acquired apical four chamber view, apical two chamber view and long axis of left ventricle view.By 2D-SE analysis software Left ventricular longitudinal peak systolic strain Eighteen segments and global peak systolic strain each view were measured. The preoperative values and postoperative ones were compared; Values between the two groups were compared.Results (1) All parameters after lung resections in patients were significantly lower (P < 0.05).(2) There was no significant difference before surgery between the two groups in all parameters (P>0.05); In the pneumonectomy group LV post and lat wall of longitudinal peak systolic strain and LV longitudinal global peak systolic strain were significantly lower than in the lobectomy group those 1 week postoperatively(P < 0.05), but the difference between the rest were not significant(P>0.05).Conclusion Speckle tracking echocardiography technology to quantify the regional and global myocardial systolic function of left ventricular wall is a accurate, angle-independent, new tool. In the early postoperative period pulmonary resection caused a significant dysfunction. The more lung resections, the lower the LV post and lat wall of longitudinal peak systolic strain and LV longitudinal global peak systolic strain.