Abstract
Right ventricular (RV) dysfunction in sarcoidosis is associated with adverse outcomes. Assessment of RV function by conventional transthoracic echocardiography (TTE) is challenging due to the complex RV geometry. Knowledge-based reconstruction (KBR) combines TTE measurements with three-dimensional coordinates to determine RV volumes. The aim of this study was to investigate the accuracy of TTE-KBR compared to the gold standard cardiac magnetic resonance imaging (CMR) in determining RV dimensions in pulmonary sarcoidosis. Pulmonary sarcoidosis patients prospectively received same-day TTE and TTE-KBR. If performed, CMR within 90 days after TTE-KBR was used as reference standard. Outcome parameters included RV end-diastolic volume (RVEDV), end-systolic volume (RVESV), stroke volume (RVSV) and ejection fraction (RVEF). 281 patients underwent same day TTE and TTE-KBR. In total, 122 patients received a CMR within 90 days of TTE and were included. TTE-KBR measured RVEDV and RVESV showed strong correlation with CMR measurements (R = 0.73, R = 0.76), while RVSV and RVEF correlated weakly (R = 0.46, R = 0.46). Bland–Altman analyses (mean bias ± 95% limits of agreement), showed good agreement for RVEDV (ΔRVEDVKBR-CMR, 5.67 ± 55.4 mL), while RVESV, RVSV and RVEF showed poor agreement (ΔRVESVKBR-CMR, 21.6 ± 34.1 mL; ΔRVSVKBR-CMR, − 16.1 ± 42.9 mL; ΔRVEFKBR-CMR, − 12.9 ± 16.4%). The image quality and time between CMR and TTE-KBR showed no impact on intermodality differences and there was no sign of a possible learning curve. TTE-KBR is convenient and shows good agreement with CMR for RVEDV. However, there is poor agreement for RVESV, RVSV and RVEF. The use of TTE-KBR does not seem to provide additional value in the determination of RV dimensions in pulmonary sarcoidosis patients.
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Abbreviations
- CMR:
-
Cardiac magnetic resonance imaging
- CS:
-
Cardiac sarcoidosis
- EDV:
-
End-diastolic volume
- EF:
-
Ejection fraction
- ESV:
-
End-systolic volume
- KBR:
-
Knowledge-based reconstruction
- LGE:
-
Late gadolinium enhancement
- PH:
-
Pulmonary hypertension
- RV:
-
Right ventricular
- SV:
-
Stroke volume
- TTE:
-
Transthoracic echocardiography
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This work was supported by ZonMw (The Netherlands Organization for Health Research and Development).
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Mathijssen, H., Huitema, M.P., Bakker, A.L.M. et al. Value of echocardiography using knowledge-based reconstruction in determining right ventricular volumes in pulmonary sarcoidosis: comparison with cardiac magnetic resonance imaging. Int J Cardiovasc Imaging 38, 309–316 (2022). https://doi.org/10.1007/s10554-021-02405-x
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DOI: https://doi.org/10.1007/s10554-021-02405-x