Key result
CMR identifies ~50% pulmonary regurgitation fraction to guide intervention in repaired tetralogy of Fallot.
Why the study?
Pulmonary regurgitation requiring pulmonary valve replacement is common after surgically repaired tetralogy of Fallot, and cardiac MRI plays a crucial role in PVR decision-making.
Observational (n=165)
CMR is a valuable tool for assessing surgically repaired tetralogy of Fallot and guiding the timing and technique of pulmonary valve replacement.
May support CMR for pulmonary regurgitation assessment in repaired tetralogy of Fallot; leaves open prospective validation before guiding interventions.
OBJECTIVE: Pulmonary regurgitation (PR) required pulmonary valve replacement (PVR) is usually seen after surgically repaired tetralogy of Fallot (TOF). Assessment by cardiac magnetic resonance imaging (CMR) plays a crucial role in the decision of PVR. Herein, we presented our 3-year interdisciplinary CMR experience in the assessment of repaired TOF. METHODS: CMR examinations of 196 patients with repaired TOF performed between 2016 and 2018 were enrolled in this retrospective study. Only 165 were included in the study. CMR findings were assessed according to the American College of Cardiology/American Heart Association guideline and recommendations of Geva. RESULTS: , 39.90±6.60%, and 47.83±6.12%, respectively. The PR fraction was as 50.10±2.54% and 2.25±1.92. Balloon dilatation and/or stenting of branch pulmonary arteries in 12 patients and ventricular septal defect closure in four patients were performed at the same session of percutaneous PVR. At the time of the surgical PVR, repair of partial anomalous pulmonary venous return in one patient, ventricular septal defect in two patients, and subaortic membrane in one patient were performed. An implantable cardioverter-defibrillator was also performed in one patient. CONCLUSION: Our CMR experience has the largest patient population in our country and may contribute to the national data pool. We believe that our collaborative experience between radiologists, cardiologists, and cardiovascular surgeons may also enhance the use of CMR in determining the appropriate technique or timing for PVR.
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Serçin Özkök (2021) conducted an observational in Surgically Repaired Tetralogy of Fallot (n=165). Cardiac magnetic resonance imaging (CMR) was evaluated on Pulmonary regurgitation fraction. Cardiac magnetic resonance imaging in 165 patients with repaired tetralogy of Fallot demonstrated a mean pulmonary regurgitation fraction of 50.10% and guided subsequent interventions.
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