Abstract 3075: Midwall Fractional Shortening and Circumferential End- Systolic Wall Stress in Morbidly Obese Patients Before and After Bariatric Surgery
Introduction. Adaptative cardiac changes in morbidly obese patients frequently involve abnormalities in the left ventricular geometric pattern, including hypertrophy and modified left ventricular sphericity properties. Midwall measurement of LV systolic function may be preferable to endocardial measurements in these patients.
Objective. To assess the parameters of midwall LV function in morbidly obese patients accepted for bariatric surgery before and after the procedure.
Methods. Patients accepted for bariatric surgery were prospectively included. In each case, transthoracic echocardiography and measurement of systolic blood pressure following the study were registered before surgery and repeated for follow-up 6 months and 1 year after the procedure. Midwall fractional shortening and circumferential end-systolic wall stress were calculated using their respective equations.
Results. 47 consecutive patients were included. The mean age was 40.4 (10.6) years, and there were 40 women. Follow-up reached 1 year in 24 cases so far. The mean body mass index changed from 46.8 Kg/m2 before surgery, to 33.9 after 6 months and 30.78 after 1 year, p<0.001. Midwall LV systolic parameters with changes from baseline to 1 year after surgery are depicted in the table⇓. Of note, SBP decreased by 14.3% and relative wall thickness was reduced by 26.1%. Midwall fractional shortening and circumferential end-systolic wall stress values were in normal ranges before surgery and no significant changes were detected after the procedure.
Conclusions. Midwall fractional shortening and circumferential end-systolic wall stress are preserved in morbidly obese patients. Systolic blood pressure and relative wall thickness get back to normal values 1 year after bariatric surgery.