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A 60-year-old man with a medical history of hypertension and dyslipidaemia presented to our rapid access chest pain clinic with a 2-month history of chest pain on exertion. An exercise stress test was arranged, which showed electrical evidence of inducible ischaemia. Subsequently, a coronary angiogram revealed an anomalous left anterior descending artery arising from the main pulmonary artery that received grade 3 collaterals from a large right coronary artery arising from the aorta. The circumflex arises from the right coronary sinus with a retroaortic course and provided collaterals to the anomalous left anterior descending artery. The patient was managed medically with the recommended pharmacological measures for stable angina and responded well with complete resolution of his symptoms, and he is currently under regular follow-up in the cardiology outpatient department.

Anomalous left anterior descending artery arising from the pulmonary trunk: a rare cause of angina