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Truncus Arteriosus

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Contributor: Jose Moltedo, MD

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Truncus Arteriosus accounts for 1-4% of all CHD, is more frequent in males and is associated with extra-cardiac anomalies in 20-30 % of cases. It is characterized by a single arterial trunk arising from the heart supplying the systemic, pulmonary and coronary circulation, and results from a defect in cono-truncal septation. This accounts for the almost universally large ventricular septal defect. The truncal valve may have one, or as many as six cusps - but is most commonly tricuspid, quadricuspid or bicuspid. In addition, the truncal valve may be stenotic and is often insufficient, sometimes significantly.

Clinical considerations...

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