A technique for the detection of asynergistic motion in the left ventricle

✍ Scribed by Lowell D. Harris; Paul D. Clayton; Hiram W. Marshall; Homer R. Warner

• Publisher: Elsevier Science
• Year: 1974
• Tongue: English
• Weight: 915 KB
• Volume: 7
• Category: Article
• ISSN: 0010-4809
• DOI: 10.1016/0010-4809(74)90014-7

✦ Synopsis

A method is described whereby 6O/second, monoplane, video images of the opacified left ventricle are digitized and the location of the endocardial surface is determined by a computer-based algorithm. For each contour, representing the location of the endocardial surface in a single plane at a given point in time, a reference point is defined as the midpoint of a straight line connecting the center of the aortic valve to the apex. The radial distances from the reference point to the contour are determined at five-degree increments around the contour for each of the contours during systole. The correlation coefficients and linear regression slopes for each radius sequence versus the mean radius sequence are calculated and plotted. The correlation coefficient and linear regression slope means and ranges are determined for normal hearts and then compared with the values from a heart demonstrating an abnormal pattern. By a computer method, the location and characteristics of the motion abnormality are described.