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The four components of TOF are right ventricular outflow/pulmonary stenosis, ventricular septal defect (VSD), overriding aorta, and right ventricular hypertrophy. The primary lesion is underdevelopment of the pulmonary infundibulum, which has led some to refer to this disease as "monology of Fallot" because all aspects of the tetrad result from ... ................
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