Measurement of left ventricular ejection fraction by mechanical cross-sectional echocardiography.
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It is concluded that sector scan echocardiography is more reliable than conventional M-mode techniques for estimatingleft ventricular ejection fraction, but estimation of left ventricular end-diastolic volume is unreliable with the methods currently available.Abstract:
Cross-sectional echocardiography is a new noninvasive technique for imaging the heart. We developed a method for using mechanical cross-sectional echocardiograms (sector scans) to determine left ventricular volumes and ejection fraction. Using left ventricular cineangiography as a standard, sector scan ejection fraction correlated better (r = 0.93) than M-mode echocardiography by any of three established methods, and the sector scan regression line did not differ from the line of identity (p greater than 0.33). Interobserver variability for sector scan ejection fraction was 2.3 +/- 1.2% (mean +/- SD). Variation between two studies performed within 24 hours and analyzed by the same observer was 1.4 +/- 1.5%. However, the sector scans consistently underestimated left ventricular end-diastolic volume. We conclude that sector scan echocardiography is more reliable than conventional M-mode technique for estimating left ventricular ejection fraction, but estimation of left ventricular end-diastolic volume is unreliable with the methods currently available.read more
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References
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Journal ArticleDOI
Left Ventricular Volumes and Ejection Fraction by Echocardiography
TL;DR: Left ventricular dimensions in systole and diastole can be reliably determined and left ventricular chamber size and ejection fraction can be quantitated in man by the noninvasive technique of echocardiography.
Journal ArticleDOI
Determination of Left Ventricular Volumes by Ultrasound
TL;DR: The use of a cube function of the echographic minor axis was an accurate predictor of volumes only in smaller ventricular chambers, but overestimated volumes in larger hearts.
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Ultrasound measurements of the left ventricle. A correlative study with angiocardiography.
Harvey Feigenbaum,Richard L. Popp,Stanley B. Wolfe,Bart L. Troy,Joaquin F. Pombo,Charles L. Haine,Harold T. Dodge +6 more
TL;DR: Echocardiography ultimately may provide a clinically useful, noninvasive technique for quantitative estimations of left ventricular volumes in man, and this technique has been developed for measuring the distance between the interventricular septum and the posterior wall of the left ventricle using pulsed reflected ultrasound.
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Effect of transducer placement on echocardiographic measurement of left ventricular dimensions.
TL;DR: An echocardiogram from the left ventricle may be used to estimate left ventricular volume and rate of circumferential fiber shortening, to measure posterior wall and interventricular septal thickness and to evaluate the normality of sePTal motion.
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A Sector Scanner for Real Time Two-Dimensional Echocardiography
TL;DR: A sector scanning system for obtaining two-dimensional echocardiograms in real time using ultrasonic pulse-echo techniques and its advantages include high transducer sensitivity, real time imaging and easy visualization of various regions of the heart.