Question: how accurate are ejection fraction measurements?
Answer: Nonetheless, sensitivity and specificity for determining LVEFs of <40% for SPECT and echocardiography were 90% and 86%, and 75% and 89%, respectively. LVEF of ≤35% was correctly assessed by both SPECT and echocardiography. Sensitivity and specificity for SPECT were 82% and 89%, and 81% and 88% for echocardiography.