Diagnosis of hemi-truncus arteriosis by three-dimensional magnetic resonance angiography.

Abstract

Two patients, aged 3 days (weight 2 kg) and 40 years (weight 80 kg) underwent gadolinium-enhanced magnetic resonance angiography (MRA) because of diagnostic uncertainty. The newborn infant was antenatally diagnosed with truncus arteriosis. Postnatal echocardiography confirmed the diagnosis. It was thought that the branch pulmonary arteries were confluent (type II); however, an MRA was requested to clarify this. The MR angiograms (Figure 1) showed the right pulmonary artery arising from the left side of the ascending aorta. The left pulmonary artery, which was disconnected from the right pulmonary artery, was supplied by the patent ductus arteriosis arising …