[Application of central-line-chord method to study left ventricular wall motion in left ventriculogram]

The left ventricular wall motion in left ventriculogram of 71 patients with coronary artery disease was analysed in our laboratory with central-line-chord method. 55 of 71 patients had ventricular wall motion abnormalities (77.46%). The regional wall motion abnormality (RWMA) often occurred in the areas of ventricles with poor blood supply from the stenosed coronary artery (CCA). When both LCA and RCA had stenosis, abnormal area would show in chords 10 to 28 or chords 40 to 80, when LAD stenosed, chords 10 to 30 or chords 52 to 720, and when CFX stenosed, then chords 64 to 80 were involved. The results also suggest that RWMA would appear when EF was still within normal limits. Thus, RWMA provides earlier prediction of abnormal left ventricular function than LVEF.