The pentalogy of Fallot is a variant of the more common tetralogy of Fallot, comprising the classic four features with the addition of an atrial septal defect or patent ductus arteriosus:
- ventricular septal defect (VSD)
- right ventricular outlfow tract narrowing or complete obstruction
- right ventricular hypertrophy
- overriding aorta
- atrial septal defect (ASD) or patent ductus arteriosus (PDA)
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