RESUMEN
INTRODUCTION: Coronary artery disease in people under 30 years is relatively uncommon, but once a disease occurs it brings a significant morbidity and psychological effects. CASE REPORT: We reported a 28-year-old patient presenting atypical symptoms after sincopa and non-specific changes on electrocardiogram at admission. After noninvasive and invasive cardiology diagnostic procedures were made, we concluded that he had a subtotal tubular stenosis in proximal segment of the left anterior descending coronary artery. Myocardial revascularization was successfully performed 24-hour after coronarography with the left internal mammary thoracic artery graft on the left anterior descending coronary artery and the patient had a prompt and satisfactory postoperative recovery. CONCLUSION: This case indicates the importance of a careful evaluation of young adults even if they do not experience typical anginal symptoms or do not have multiple risk factors for cardiovascular diseases.