Table 5

Reproducibility of ejection fraction (EF) obtained by radionuclide angiography and calculated by the echocardiograhic methods in 10 consecutive patients with left ventricular hypertrophy, and the reproducibility for the echocardiographic methods in 10 healthy young subjects examined by the same investigators and the same equipment

EF by radionuclide angiographyEF by Teichholz’s formulaEF by mitral ring motion × 5EF by Simpson’s rule
Repositioning of the gamma camera between the recordingscv = 1.7%
When the patient also sat in a chair between the recordingscv = 2.7%
Intraindividual reproducibility in young healthy subjectscv = 5.1%cv = 2.4%cv = 4.9%
Interindividual reproducibility in young healthy subjectscv = 5.6%cv = 3.5%cv = 6.8%
Intraindividual reproducibility in patients with left ventricular hypertrophycv = 14.9%cv = 20.1%cv = 18.1%
Interindividual reproducibility in patients with left ventricular hypertrophycv = 18.4%cv = 26.2%cv = 28.1%
  • Coefficient of variation (cv) = SD of difference/mean value × 100.