Kazunori Okada1, Sanae Kaga2, Minami Araki3, Kosuke Tsujita4, Ayaka Yoshikawa4, Mizuki Hara4, Yoichi Sakamoto4, Nobuo Masauzi2, Taisei Mikami2. 1. Faculty of Health Sciences, Hokkaido University, N12-W5, Kita-Ku, Sapporo, Japan. ichinori@hs.hokudai.ac.jp. 2. Faculty of Health Sciences, Hokkaido University, N12-W5, Kita-Ku, Sapporo, Japan. 3. Department of Health Sciences, School of Medicine, Hokkaido University, Sapporo, Japan. 4. Kitanodai Clinic, Medical Corporation Hokuseki Group, Kitahiroshima, Japan.
Abstract
PURPOSE: The purpose of this study was to test whether the fractional change in the endocardial border length between end-diastole and end-systole as manually traced in left ventricular ejection fraction (LVEF) measurement using the biplane method of disks (MOD) was consistent with the global longitudinal strain derived from speckle-tracking echocardiography. METHODS: For 105 patients who underwent echocardiography, two- and four-chamber images with manually traced endocardial lines for LVEF measurement by MOD were stored. LV endocardial lengths at end-diastole and at end-systole were measured on both images to calculate the fractional length changes, which were averaged (GLSMOD). Speckle-tracking analysis was performed to measure global longitudinal strains in the apical two- and four-chamber and long-axis images, and the three values were averaged (GLSSTE) according to the ASE and EACVI guidelines. RESULTS: There was no significant difference between GLSMOD and GLSSTE. GLSMOD correlated well with GLSSTE (r = 0.81, p < 0.001), and there was no fixed bias in the Bland-Altman analysis. The intraclass correlations for the intra- and inter-observer comparisons for GLSSTE were excellent, and those for GLSMOD were adequate. CONCLUSION: The fractional LV endocardial border length change, GLSMOD, showed sufficient agreement with GLSSTE to justify its use as a substitute for the STE-derived global longitudinal strain.
PURPOSE: The purpose of this study was to test whether the fractional change in the endocardial border length between end-diastole and end-systole as manually traced in left ventricular ejection fraction (LVEF) measurement using the biplane method of disks (MOD) was consistent with the global longitudinal strain derived from speckle-tracking echocardiography. METHODS: For 105 patients who underwent echocardiography, two- and four-chamber images with manually traced endocardial lines for LVEF measurement by MOD were stored. LV endocardial lengths at end-diastole and at end-systole were measured on both images to calculate the fractional length changes, which were averaged (GLSMOD). Speckle-tracking analysis was performed to measure global longitudinal strains in the apical two- and four-chamber and long-axis images, and the three values were averaged (GLSSTE) according to the ASE and EACVI guidelines. RESULTS: There was no significant difference between GLSMOD and GLSSTE. GLSMOD correlated well with GLSSTE (r = 0.81, p < 0.001), and there was no fixed bias in the Bland-Altman analysis. The intraclass correlations for the intra- and inter-observer comparisons for GLSSTE were excellent, and those for GLSMOD were adequate. CONCLUSION: The fractional LV endocardial border length change, GLSMOD, showed sufficient agreement with GLSSTE to justify its use as a substitute for the STE-derived global longitudinal strain.
Entities:
Keywords:
Biplane method of disks; Ejection fraction; Global longitudinal strain; Left ventricular systolic function; Speckle-tracking echocardiography
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