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Ann Thorac Surg 1989;48:792-797
© 1989 The Society of Thoracic Surgeons

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Articles

Coronary arterial and sinusal anatomy in hearts with a common arterial trunk

^a Department of Pediatrics, National Heart & Lung Institute, Brompton Hospital, London, United Kingdom
^b Department of Paediatric Cardiology, The Hospital for Sick Children, London, United Kingdom

Accepted for publication August 15, 1989.

^_* Address reprint requests to Dr Suzuki, Department of Pediatrics, National Cardiovascular Center, 4-7-1 Fujishini-dai, Suita-shi, Osaka 565, Japan.

Eighty-four specimens of common arterial trunk were studied with special reference to the arrangement of the leaflets in relation to the atrioventricular valves, the origin of the coronary arteries in relation to the arterial sinuses, and the epicardial course of the coronary arteries. Fourteen normal hearts were used for comparison. In the hearts with common arterial trunk, the location and level of the coronary artery orifices (as well as the relationship of the truncal root to the area of fibrous continuity with the mitral valve) are different from those in normal hearts. In none of the hearts with common arterial trunk (particularly the 53 hearts with three leaflets in the truncal valve) did the appearance of the truncal valve approximate that of a normal aortic valve. Among the 22 hearts with four leaflets, there was a high incidence of coronary artery orifices in opposite sinuses ([equation] or 77.3%) and a low incidence of coronary artery orifices in adjacent sinuses ([equation] or 9.1%). These results suggest that the formation of the truncal valve is independent of the formation of the coronary orifices. Its leaflets are not predestined to become part of either the aortic valve or the pulmonary valve.

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