Left ventricular contour in a patient with regional wall motion abnormalities in the distribution territory of the left anterior descending coronary artery. The artery territory is indicated by the dashed horizontal line and ranges from chord 10 to 66. Shaded area indicates the 50% of consecutive chords with the least contraction within the artery territory (central regional wall motion) with a mean severity of hypokinesia of −3.4 SD. The remaining 50% of chords are represented by the dashed line from chord 10 to 20 and from chord 48 to 66 (peripheral regional wall motion). Note the compensatory hyperkinesia in the inferior wall.