Valvular & structural heart disease
Evaluation of aortic regurgitation severity using flow convergence from the parasternal window: comparison with cardiac magnetic resonance and traditional Doppler parameters
Authors' conclusion
In chronic AR, flow convergence is more identifiable from the parasternal long axis window compared to traditional PISA measured from the apical window. FCPLA nonvolumetric parameters relate well to AR severity by CMR and are comparable to conventional echo/Doppler parameters.
Study context
- Population
- Patients with chronic AR who underwent transthoracic echocardiography and cardiac magnetic resonance imaging (CMR) within 4 hpatients evaluated
- Participants
- 80 patients
- Comparison
- Flow convergence (FC) and other echo/Doppler results were compared to CMR-derived regurgitant volume (RegV)
- Outcome
- Significant AR by CMR (RegV > 45 mL)
Main finding
As reported in the abstract
AR significant by CMR
41%
Further findings
| Outcome | Lmax | Dmax |
|---|---|---|
| AUC for identifying significant ARLmax and FC area demonstrating significantly higher AUCs | 0.98 | 0.84 |
| Cut-off | 0.55 cm | 0.65 cm |
- AUC for identifying significant AR — vena contracta width AUC
- 0.94
- AUC for identifying significant AR — left ventricular end-diastolic volume index AUC
- 0.91
- AUC for identifying significant AR — jet width/LVOT diameter AUC
- 0.80
- AUC for identifying significant AR — descending aorta end-diastolic velocity AUC
- 0.74
- AUC for identifying significant AR — pressure half-time AUC
- 0.71
- AUC for identifying significant AR: FCPLA area AUC 0.94 · cut-off 0.35 cm²
Feasibility
- FCPLA parameters measurable
- 83%
- Apical PISA quantitation feasible
- 39%
Correlation of FCPLA measurements with CMR RegV
- Spearman ρ for Lmax
- 0.75
- Spearman ρ for Dmax
- 0.65
- Spearman ρ for area
- 0.78
Original publication
Evaluation of aortic regurgitation severity using flow convergence from the parasternal window: comparison with cardiac magnetic resonance and traditional Doppler parameters. Eur Heart J Cardiovasc Imaging. Published 22 December 2025. doi:10.
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