Introduction 3. Etiology 4. Histopathology 5. Pathogenesis and causative mechanisms 6. Coronary artery ectasia as a generalized vascular disease 7. Cardiovascular risk factors 8. Clinical and imaging features 9. Flow alteration and myocardial ischemia 10. Prognosis 11. Treatment 11.1. Medical therapy 11.2. Role of revascularization 12. Conclusion 13. References