[Anomalous origin of the left coronary from the trunk of the pulmonary artery. Description of a clinical case].

The case of a 32 year old woman with anomalous origin of the left coronary artery from the pulmonary trunk is reported, in whom, for technical difficulties, the surgical correction has been limited to artery ligation. After surgery, there was a complete clinical improvement and normalization of the stress electrocardiogram. Nevertheless, radioisotopic studies--exercise Thallium 201 scintigraphy and radionuclide ventriculography--disclosed a poor left ventricular function. It is possible to suppose that the prolonged perfusion deficit resulted in an extensive area of myocardial fibrosis.