Comparison between ejection fraction (EF) obtained by radionuclide angiography and by three echocardiographic methods in the hypertrophy group (n = 16)
| EF by radionuclide angiography (%) | EF by Teichholz’s formula (%) | EF by mitral ring motion × 5 (%) | EF by Simpson’s rule (%) | |
|---|---|---|---|---|
| Mean (SD) | 66.8 (6.8) | 73.5 (10.0) | 53.9 ( 12.9) | 67.3 (10.7) |
| Difference from EF by radionuclide angiography | – | +6.7 ( 7.3) | −12.9 (13.9) | +0.5 (9.0) |
| Level of significance of difference | – | p = 0.002 | p = 0.002 | NS |
| Correlation to EF by radionuclide angiography | – | r= 0.69 | r = 0.11 | r = 0.55 |
| Level of significance of correlation | – | p = 0.003 | NS | p = 0.028 |
| Limits of agreement (mean difference ±2 SD) | – | −8.7 and 22.3 | – | −17.6 and 18.6 |