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• W2043022170 abstract "Previous reports have indicated that echocardiography with automatic boundary detection (ABD) is useful for the noninvasive estimation of left ventricular volume. However, few data exist regarding the measurement of left atrial (LA) volume, which also provides pivotal information in the clinical setting. Therefore, the feasibility of LA volume measurement by ABD in comparison with the manual tracing using modified Simpson's method (SM) was evaluated. Fifty-nine patients with coronary artery disease with sinus rhythm were examined. Using ABD, a region of interest was set around the LA border and mitral annulus from an apical four-chamber view. The maximal and minimal LA volume (Vmax and Vmin) were measured from the volume waveform. Using the SM, the maximal and minimal LA volume were measured by the manual tracing on frozen frames at the apical four-chamber view. The ABD displayed a curve of LA volume change that consisted of passive emptying, diastasis, and active emptying phases during the left ventricular diastolic period. Under these conditions, the Vmax and Vmin were 43.7±11.2 ml and 21.1±7.6 ml, respectively, yielding the volume change of 22.6±6.0 ml. By the SM, Vmax and Vmin were 43.1±9.9 ml {r=0.94, p<0.0001, y (ABD) = 0.91x (SM) + 3.6} and 22.0±9.0 ml (r=0.91, p<0.0001, y = 0.94x + 0.7), respectively, and the volume change was 22.8±6.1 ml (r=0.82, p<0.0001, y = 0.84x + 3.8). These results indicate that the ABD from the apical four-chamber approach could provide an accurate estimation of LA volume change, suggesting the potential value of this method in assessing LA function, although some technical difficulties need to be further overcome. (Jpn Circ J 1998; 62: 755 - 759)" @default.
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• W2043022170 date "1998-01-01" @default.
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• W2043022170 title "Comparison of Automatic Boundary Detection and Manual Tracing Technique in Echocardiographic Determination of Left Atrial Volume" @default.
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• W2043022170 doi "https://doi.org/10.1253/jcj.62.755" @default.
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