Real-time Determination of Left Ventricular Ejection Fraction by Automatic Boundary Detection in Patients with Dilated Cardiomyopathy: A Comparison with Radionuclide Ventriculography

Jong Won Ha, Namsik Chung, Kyung Hoon Choe, June Kwan, Se Joong Rim, Yangsoo Jang, Ji Young Kim, Eun Kyung Oh, Young Joon Lee, Won Heum Shim, Seung Yun Cho, Sung Soon Kim

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Abstract

Echocardiographic automatic boundary detection (ABD) is a new on-line technique which automatically outlines the left ventricular endocardial border and instantly calculates the left ventricular area and volume from two dimensional echocardiographic images. To determine if left ventricular ejection fraction (LVEF) can be derived using the ABD method, 25 consecutive patients with dilated cardiomyopathy, aged 52.1±152 (range 14∼75), underwent complete echocardiographic examination with both the ABD method and radionuclide ventriculography (RVG). End-diastolic and end-systolic left ventricular areas were obtained on-line from the apical four chamber view. Left ventricular length was also measured from an apical view. Left ventricular volumes and ejection fraction were calculated using the single plane area-length method. ABD measurements could be obtained in all patients. Linear regression analysis compared ejection fraction derived by ABD and RVG. The mean radionuclide LVEF was 20.9±6.8% and mean ABD-derived LVEF was 22.7±5.8%. Linear regression analysis revealed that the ABD-derived LVEF is closely correlated with the RVG-derived LVEF (r=0.87, p<0.001). In conclusion, ABD echocardiography is a new on-line technique which may be used to accurately calculate LVEF in patients with dilated cardiomyopathy.

Original languageEnglish
Pages (from-to)385-391
Number of pages7
JournalYonsei medical journal
Volume37
Issue number6
DOIs
Publication statusPublished - 1996 Jan 1

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All Science Journal Classification (ASJC) codes

  • Medicine(all)

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