Truncus Arteriosus
Pronunciation: TRUN-kus ar-teer-ee-OH-sus
A rare congenital heart defect where a single vessel arises from the heart and serves as the aorta, pulmonary artery, and coronary arteries.
Full Definition
Truncus Arteriosus is a complex congenital heart defect in which a single large vessel arises from the heart and gives rise to the systemic, coronary, and pulmonary circulations. This condition is always associated with a large ventricular septal defect and results in mixing of oxygenated and deoxygenated blood. Infants with truncus arteriosus typically present with congestive heart failure and cyanosis in the first months of life. Surgical repair usually involves creating separate pathways for systemic and pulmonary circulation using a conduit.
Usage
Usage note: Often classified by anatomical types (I-IV). Ensure distinction from 'truncated' which has a different meaning.
In Context
- "The newborn was diagnosed with Type I Truncus Arteriosus requiring early surgical intervention." — Neonatal cardiology consultation
- "Truncus Arteriosus accounts for 1-3% of all congenital heart defects." — Epidemiological review