Truncus arteriosus (single great artery leaving the base of the heart, giving rise to the coronary, pulmonary, and systemic arteries) with a short pulmonary trunk arises from the truncus arteriosus, giving rise to both pulmonary arteries. The phenotype is Type I truncus arteriosus (Human Phenotype Ontology term HP_0004384). Also known as: Persistent truncus arteriosus type I, Type 1 truncus arteriosus.