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Chapter-32 Truncus Arteriosus

BOOK TITLE: Clinical Diagnosis of Congenital Heart Disease

Author
1. Saxena Anita
ISBN
9788184481617
DOI
10.5005/jp/books/10126_32
Edition
1/e
Publishing Year
2008
Pages
7
Author Affiliations
1. All India Institute of Medical Sciences, New Delhi, All India Institute of Medical Sciences, New Delhi, India, Sanjay Gandhi Postgraduate, Institute of Medical Sciences, Lucknow (UP), All India Institute of Medical Sciences, Ansari Nagar, New Delhi, e-mail: anitasaxena@hotmail.com, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India, All India Institute of Medical Sciences New Delhi, India, Pt BD Sharma University of Health Sciences, Rohtak, Haryana, India
Chapter keywords

Abstract

In truncus arteriosus a single arterial trunk leaves the heart through a common valve (truncal valve) and gives origin to coronary arteries, pulmonary artery or arteries and continues as aorta. Popular classification is by Collet and Edwards where type of origin of pulmonary artery forms the basis of classification. Truncal valve overrides a large VSD. Both ventricles push blood to the common trunk through the VSD. Truncal regurgitation is common. Neonates or infants develop CHF due to high pulmonary flow. An infant with CHF, if an early diastolic murmur is audible, there is high suspicion of truncus arteriosus. ECG shows biventricular enlargement. X-ray evidences of cardiomegaly, LV contour, absent PA shadow and plethoric lung fields are present. Echocardiography confirms the diagnosis by demonstrating the common trunk, site of pulmonary arterial origin from the trunk, a large overriding VSD and truncal valve regurgitation if present. Management is essentially surgical repair.

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