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October 14, 2012
8:00:00 AM - 11:00:00 AM
Room Hall C-Area A
Left Ventricular Mass in Patients Undergoing Surgery for Hypertrophic Obstructive Cardiomyopathy
Zak Hillel, M.D., Kiran Kalal, M.D., Daniel G. Swistel, M.D., Sandhya Balaram, M.D., Michal Gajewski, M.D., Mark Sherrid, M.D.
St. Luke's Roosevelt Hospital Center, New York, New York, United States
Left ventricular (LV) mass was determined using 3D transesophageal echocardiography (TEE) in patients with hypertrophic obstructive cardiomyopathy (HOCM) undergoing cardiac surgery with cardiopulmonary bypass (CPB) . End-diastolic (ED) and end-systolic (ES) values were compared before (pre) and after (post) CPB. We first hypothesized that there are no differences between ED and ES LV mass determined at any time. The second hypothesis was that LV mass will increase post CPB compared to pre CPB due to myocardial tissue edema.

3D echocardiographic data were obtained in 4 patients undergoing cardiac surgery with CPB during routine intraoperative TEE examination. LV mass was calculated off-line from the data analyzed with commercial software (3DQ-QLab, Philips).

There ware no statistically significant differencec between LV mass determined pre-CPB at ED and ES (97.0 vs. 98.4 GM) nor post-CPB at ED and ES (104.1 vs. 98.4 GM). ED LV mass pre-CPB was not significantly different from post-CPB ED LV mass (106.4 vs. 104.1 GM). Neither was ES LV mass pre-CPB significantly different from post-CPB (97.0 vs. 98.4 GM). These LV mass measurements are in gross agreement with previously published data. We conclude that 3D TEE measurement of LV mass are independent of timing in cardiac cycle. In addition, cardiac surgery with CPB for correction of HOCM did not apear to cause myocardial tissue swelling as determined by 3D TEE. Due to the limited number of patients studied additional investigation is necessary to validate these conclusions.

Copyright © 2012 American Society of Anesthesiologists