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Persistent Left Superior Vena Cava (SVC)

CT and Angiogram of persistent left superior vena cava

Definition: What is it? Persistent left common cardinal vein
Incidence: <1% overall, 3-10% in kids with congenital heart disease.
Anatomy: Left brachiocephalic vein often absent. Right SVC is usually present, may be small, rarely absent.
Vascular drainage of a persistent left SVC: coronary sinus into RA, less likely straight into the left atrium

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