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Figure 1 LV volumes, LVEF and percent abnormal chords determined by biplane contrast ventriculograms at baseline and after 3 months in patients with immediate (solid triangles) or delayed (open triangles) PTCA. LVEDVI = left ventricular end-diastolic volume index; LVESVI = left ventricular end-systolic volume index, chords = percent abnormal chords (variable of infarct zone wall motion; see Methods).