Figure 3.

(A) Amount of viable myocardium indicated by the number of viable segments in 23 patients with a left ventricular ejection fraction (LVEF) ≤ 20%. Using perfusion in combination with metabolic criteria for viability, 19 patients (83%) had significant viability (≥ 4 viable segments) and four (17%) did not. (B) Amount of viable myocardium indicated by the number of viable segments in 54 patients with an LVEF > 20% but ≤ 30%. Using perfusion in combination with metabolic criteria for viability, 30 patients (56%) had significant viability (≥ 4 viable segments) and 24 (44%) did not. (C) Amount of viable myocardium indicated by the number of viable segments in 27 patients an LVEF > 30% but ≤ 35%. Using perfusion in combination with metabolic criteria for viability, 14 patients (52%) had significant viability (≥ 4 viable segments) and 13 (48%) did not.