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Persistent truncus arteriosus: Pathologic anatomy in 54 cases

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Summary

Fifty-four specimens of heart with persistent truncus arteriosus (PTA) were reviewed anatomically. According to the Collett-Edwards classification [11] there were 28 examples of type I and 26 type II. The sex distribution was equal.

The number of the truncal cusps ranged from one to four (42% tricuspid, 30% bicuspid, 24% quadricuspid, and 4% unicommissural). A unicommissural truncal valve has not been previously reported. In 72% of cases, the truncal valve leaflets were thickened or dysplastic. Two valves were stenotic.

The truncus arteriosus originated from both ventricles equally in 42% of the cases, predominantly from the right ventricle in 42%, and predominantly from the left ventricle in 16% of the cases. In unoperated cases of PTA originating predominantly from the right ventricle, it appeared to us that usual operative correction might result in left ventricular outflow obstruction.

Variations in coronary arterial origins and patterns were present in nearly half of the cases. A single coronary artery was observed in ten cases (18.5%). Stenosis of the ostium of one coronary artery was seen in each of four cases (7%). High posterior origin of the left coronary artery was observed in ten cases (18.5%).

Among the associated cardiovascular anomalies, the most common were right aortic arch (36%) and interruption of the aortic arch (11%). Three cases with the latter condition exhibited crossed pulmonary arteries. Isolated cases with tricuspid atresia, vascular sling (left pulmonary artery arising from right pulmonary artery), and persistent common atrioventricular canal were encountered.

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Authors and Affiliations

  1. Department of Pathology, United Hospital, 333 North Smith Avenue, 55102, St. Paul, Minnesota, USA

    Fouad Butto, Russell V. Lucas Jr. &  Jesse E. Edwards

  2. Department of Pathology, University of Minnesota, Minneapolis, Minnesota, USA

    Fouad Butto, Russell V. Lucas Jr. &  Jesse E. Edwards

  3. Department of Pediatric Cardiology, University of Minnesota, Minneapolis, Minnesota, USA

    Fouad Butto, Russell V. Lucas Jr. &  Jesse E. Edwards

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  1. Fouad Butto
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  2. Russell V. Lucas Jr.
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  3. Jesse E. Edwards
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Butto, F., Lucas, R.V. & Edwards, J.E. Persistent truncus arteriosus: Pathologic anatomy in 54 cases. Pediatr Cardiol 7, 95–101 (1986). https://doi.org/10.1007/BF02328958

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