Cardiovascular System - Truncus Arteriosus
Embryology - 2 Jun 2024 Expand to Translate |
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Introduction
In normal development, truncus arteriosus is a term used to describe early heart development before septation of the outflow tract.
In abnormal development, truncus arteriosus is used to describe the failure of outflow tract to be divided into aorta and pulmonary artery. This current page relates to this cardiac abnormality.
The two Great Arteries (Aorta and Pulmonary Artery) have a single origin from the heart and blood from both ventricles passes across a VSD into the single arterial trunk. The lung circulation is exposed to very high pressure and increased blood flow (as with a large VSD). Heart failure often develops in the early weeks of life.