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Article

Branch Pulmonary Artery Regurgitation in Repaired Tetralogy of Fallot: Correlation with Pulmonary Artery Morphology, Distensibility, and Right Ventricular Function

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Department of Diagnostic and Therapeutic Radiology, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, 270 Rama 6 Road, Bangkok 10400, Thailand
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Division of Cardiology, Department of Pediatrics, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, 270 Rama 6 Road, Bangkok 10400, Thailand
*
Author to whom correspondence should be addressed.
Academic Editor: Michail Plotkin
Tomography 2021, 7(3), 412-423; https://doi.org/10.3390/tomography7030036
Received: 9 July 2021 / Revised: 3 August 2021 / Accepted: 24 August 2021 / Published: 1 September 2021
Background: The aim was to determine the effect of pulmonary artery (PA) morphology on the branch pulmonary artery-regurgitation fraction (BPA-RF), the relationship of pulmonary insufficiency (PI) to BPA-RF and PA-distensibility, and factors (BPA-RF and PA-distensibility) associated with right ventricular function (RVF) in repaired tetralogy of Fallot (rTOF). Methods: A total of 182 rTOF patients (median age 17.1 years) were analyzed for length, angle of PA, BPA-RF, PI, and PA-distensibility, using magnetic resonance imaging. Results: The left PA had a significant greater RF than the right PA (median (interquartile range)): LPA 43.1% (32.6–51.5) and RPA 35.2% (24.7–44.7), p < 0.001. The LPA was shorter with a narrower angle than the RPA (p < 0.001). The anatomy of the branch-PA was not a factor for the greater LPA-RF (odds ratio, 95% confidence interval: CI, p-value): length 0.44 (0.95–2.00), p = 0.28; angle 0.63 (0.13–2.99), p = 0.56. There was a strong positive correlation between PI and BPA-RF-coefficients (95% CI), p-value: LPA 0.78% (0.70–0.86), p < 0.001; RPA 0.78% (0.71–0.84), p < 0.001 and between BPA-RF and distensibility-coefficients (95%CI), p-value: LPA 0.73% (0.37–1.09), p < 0.001; RPA 1.63% (1.22–2.03), p < 0.001, respectively. The adjusted BPA-RF did not predict RVF, RPA (p = 0.434), LPA (p = 0.268). Conclusions: PA morphology is not a significant factor for the differential BPA-RF. The vascular wall in rTOF patients responds to chronic increased intravascular volume by increasing distensibility. BPA-RF is not a determinant of RVF. View Full-Text
Keywords: repaired tetralogy of Fallot; branch pulmonary artery; regurgitation fraction; pulmonary distensibilty; right ventricular function; magnetic resonance imaging repaired tetralogy of Fallot; branch pulmonary artery; regurgitation fraction; pulmonary distensibilty; right ventricular function; magnetic resonance imaging
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MDPI and ACS Style

Siripornpitak, S.; Lueangwattanapong, D.; Sriprachyakul, A.; Wanitkun, S.; Limsuwan, A. Branch Pulmonary Artery Regurgitation in Repaired Tetralogy of Fallot: Correlation with Pulmonary Artery Morphology, Distensibility, and Right Ventricular Function. Tomography 2021, 7, 412-423. https://doi.org/10.3390/tomography7030036

AMA Style

Siripornpitak S, Lueangwattanapong D, Sriprachyakul A, Wanitkun S, Limsuwan A. Branch Pulmonary Artery Regurgitation in Repaired Tetralogy of Fallot: Correlation with Pulmonary Artery Morphology, Distensibility, and Right Ventricular Function. Tomography. 2021; 7(3):412-423. https://doi.org/10.3390/tomography7030036

Chicago/Turabian Style

Siripornpitak, Suvipaporn, Duangkanok Lueangwattanapong, Apichaya Sriprachyakul, Suthep Wanitkun, and Alisa Limsuwan. 2021. "Branch Pulmonary Artery Regurgitation in Repaired Tetralogy of Fallot: Correlation with Pulmonary Artery Morphology, Distensibility, and Right Ventricular Function" Tomography 7, no. 3: 412-423. https://doi.org/10.3390/tomography7030036

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