Arq. Bras. Cardiol. 2021; 117(4): 664-665
Transcatheter Palliation for Tetralogy of Fallot
This Short Editorial is referred by the Research article "Palliative Endovascular Intervention in Infants with Tetralogy of Fallot: A Case Series".
The Tetralogy of Fallot (TOF) is the most common cyanotic congenital heart defect. The morphologic key feature of TOF is the malalignment of the infundibular septum. The infundibular septum malalignment makes the aorta override interventricular septum (dextroposition) over a large ventricular septal defect (VSD) and promotes obstruction to the right ventricular infundibular tract. The pulmonary valve is also stenotic, and the pulmonary trunk and arteries are, to some degree, hypoplastic. Severe obstruction to pulmonary blood flow (PBF) leads to more systemic unsaturation and, thus, prolonged hypoxia.
Open heart surgery is the traditional treatment modality, augmenting the right ventricular outflow tract (RVOT), closing the VSD, thus redirecting the aorta to the left ventricle, correcting the cardiac anatomy, and normalizing systemic flow saturation.
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Keywords: Cardiac Catheterization; Cyanosis; Stents; Tetralogy of Fallot
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