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• W2017171315 abstract "Left ventricular stroke volumes derived by two-dimensional echocardfography (20 echo) were compared with thermodilution and Cineangiography measurements in closed-chest dogs before and one hour after proximal LAD occlusion. Stroke volume was calculated from end-dlastolic and end-systolic volumes reconstructed by two models: (1) Simpson's rule employing left ventricular length and five short-axis cross-sectional areas; (2) a simplified volume formula (V = 5/6 area · length), utilizing a single short-axis area at either the mitral valve or midpapillary muscle level. The comprehensive Simpson reconstruction yielded a good correlation of 2D echo stroke volume against thermodilution (r = 0.89) over a range of normal (N = 14) and ischemic (N = 8) states. The simplified formula provided a satisfactory correlation (r = .90, N = 22) when using the midpapillary cross-section, which encompassed the Induced ischemic dys-synergy. In contrast, when using the mitral valve level cross-section above the site of ventricular asymmetry, there was no significant statistical correlation. Comparison of Cineangiography with 2D echo volume reconstruction based on the simplified formula with the midpapillary muscle level section yielded good correlations for stroke volume (r = 0.87) and ejection fraction (r = 0.97). Intraobserver and interobserver variability of duplicate echo stroke volume measurements was 8% and 10%, respectively. We conclude that 2D echocardlography In dogs permits quantitatlon of left ventricular stroke volume in normal and ischemic states." @default.
• W2017171315 created "2016-06-24" @default.
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• W2017171315 date "1981-01-01" @default.
• W2017171315 modified "2023-10-16" @default.
• W2017171315 title "Two-dimensional echocardiographic assessment of left ventricular stroke volume: Experimental correlation with thermodilution and cineangiography in normal and ischemic states" @default.
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• W2017171315 doi "https://doi.org/10.1002/ccd.1810070304" @default.
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