Cardiothoracic & vascular anesthesia
Automated Measurements of Left Ventricular Ejection Fraction During Cardiac Surgery by Transesophageal Echocardiography: Auto-EF Study
Authors' conclusion
The TEE measurement of manual and auto EF in cardiac surgical patients showed a strong agreement, with only a slight difference in average measurement.
Study context
- Population
- Adults undergoing various cardiac surgical procedures, 4 tertiary care hospitals in India
- Participants
- 180 adults
- Comparison
- Automated ejection fraction (EF) vs manual EF by transesophageal echocardiography (TEE)
- Outcome
- Agreement of EF between manual and auto measurements
Methodological detailsmulticentre, retrospective, observational
- Multicentre
- Retrospective
- Observational
Performance
As reported in the abstract
Interclass correlation
0.84
95% CI 0.68–0.91P < 0.001
Auto-EF vs Manual EF
Pearson's r (EF)
0.88
95% CI 0.84–0.91P < 0.001
Auto-EF vs Manual EF
Mean difference
3.30 %
Manual EF vs Auto-EF · limits of agreement −8.03 to 14.64% (Bland-Altman)
Further findings
| Outcome | Estimate | P value |
|---|---|---|
| End-diastolic and end-systolic volume correlationAuto-EF vs Manual EF | Pearson's r (end-diastolic volume) 0.95 (95% CI 0.94–0.97) | P < 0.001 |
| End-diastolic and end-systolic volume correlationAuto-EF vs Manual EF | Pearson's r (end-systolic volume) 0.94 (95% CI 0.93–0.96) | P < 0.001 |
| EF grade agreement | Cohen's kappa 0.72 (95% CI 0.64–0.79) | P < 0.001 |
- EF grade agreement — Correctly classified by auto method
- 72.2%
- EF grade agreement — Over-classified
- 23.3%
- EF grade agreement — Under-classified
- 4.4%
Parts of this Brief are withheld: the automatic checks could not confirm them against the abstract.
Original publication
Automated Measurements of Left Ventricular Ejection Fraction During Cardiac Surgery by Transesophageal Echocardiography: Auto-EF Study. J Cardiothorac Vasc Anesth. Published 3 October 2025. doi:10.
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