Table 2

Misclassification Rates of Individual Visual Estimates of LVEF Compared With Expert-Quantified EF for All Cases and When Classified as Impaired and Normal EF

Misclassification Rates (%)
Pre-Intervention
All cases (350 responses)44
Cases with mid-range EF (EF: 0.30–0.55, 200 responses)66
Cases with EF outside of mid-range (EF: <0.30 or EF >0.55, 150 responses)17
Post-Intervention
All cases (325 responses)21
Cases with mid-range EF (EF: 0.30–0.55, 175 responses)39
Cases with EF outside of mid-range (EF: <0.30 or EF >0.55, 150 responses)1

Ejection fractions are classified as mildly impaired (0.40–0.55), moderately impaired (0.30–0.39), severely impaired (<0.30), and normal (>0.55).

EF = ejection fraction; LVEF = left ventricular ejection fraction.

  • Total misclassification rate for all cases was reduced post-intervention compared with pre-intervention (p < 0.00001).

  • The misclassification rate for cases that were in the mid-range (EF: 0.30–0.55) was significantly reduced post-intervention compared with pre-intervention (p < 0.00001).

  • The misclassification rate for normal or severely impaired EF (<0.30 or >0.55) was reduced post-intervention compared with pre-intervention (p < 0.00001).