[Critical stenosis left main coronary artery in 39-year-old woman treated with percutaneous angioplasty].

Isolated critical stenosis of left main coronary artery (LMCA) due to atherosclerosis is very rare and affects about 0.2% of patients. We present the case of a 39-year-old, non-smoker women with risk factors for diseases of the cardiovascular system in the form of hypercholesterolaemia and hypertension, in addition to positive family history and chronic oral contraception. Sick from occurring since atypical angina masked depressive symptoms, with a critical stenosis of LMCA and little suggestive symptoms of ischaemia because of the existing collateral circulation.