Researchers\' work from Fourth Military Medical University focuses on tetralogy of fallot
2009 JUN 1 - (NewsRx.com) -- According to recent research published in the journal Heart Surgery Forum, "Left-ventricular end-diastolic volume index (LVEDVI) and Nakata index, which in most cases are evaluated by echocardiography and cardiac catheterization, are 2 important predictors for the prognosis of surgical correction of tetralogy of Fallot (TOF). Nonetheless, performing these procedures on TOF patients is not always feasible." "We therefore investigated whether the difference in transcutaneous pulse oxygen saturation between the standing position and squatting position (Delta SPO2) reflected the LVEDVI and Nakata index, allowing Delta SPO2 to be used as a supplement to echocardiography and cardiac catheter evaluation. Nineteen TOF patients (11 boys, 8 girls; median age 6 years) were randomly selected for this study. In each patient, we used a pulse oximeter placed on the left index finger to measure transcutaneous pulse oxygen saturation, first with the patient in a standing position and then with the patient in a squatting position. We then performed correlational analyses of Delta SPO2 and the LVEDVI or Nakata index. The mean SPO2 was 79% +/- 4% in standing patients and 84% +/- 4% in squatting patients, and the mean Delta SPO2 was 5% +/- 3%. The LVEDVI was 41 +/- 5 mL/m(2), and the Nakata index was 188 +/- 37 mm(2)/m(2). Delta SPO2 correlated with both LVEDVI (gamma=0.854, P<.05) and the Nakata index (gamma=0.641, P<.05). For patients with TOF, the Delta SPO2 between SPO2 measured in a standing and squatting position has a positive correlation with the LVEDVI and Nakata index," wrote Q. Li and colleagues, Fourth Military Medical University. The researchers concluded: "Thus these measurements may be used as supplemental factors in evaluating LV function and performing a preoperative assessment of the pulmonary artery." Li and colleagues published their study in Heart Surgery Forum (Pulse Oxygen Saturation Measured in Standing and Squatting Positions May Be Useful in Evaluating Tetralogy of Fallot. Heart Surgery Forum, 2009;12(1):E35-E38). For additional information, contact J.Z. Zhang, Fourth Military Medical University, Xijing Hospital, Dept. of Cardiovascular Surgery, Xian 710032, People's Republic of China. The publisher's contact information for the journal Heart Surgery Forum is: Forum Multimedia Publishing, LLC, 375 Greenbrier Dr., Charlottesville, VA 22901, USA. Keywords: People's Republic of China, Xian, Cardiography, Cardiology, Echocardiography, Heart Catheterization, Heart Surgery, Tetralogy Of Fallot, Fourth Military Medical University. This article was prepared by Cardiovascular Week editors from staff and other reports. Copyright 2009, Cardiovascular Week via NewsRx.com.
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