[Unusual cause of acute coronary syndrome: Horton's disease].

The pathophysiology of acute coronary syndromes is in most cases due to the erosion or rupture of a plaque with consequent thrombotic obstruction of coronary artery. In a few cases, the mechanism is different, this not modifying the initial management but imposing special techniques for diagnosis and therapeutic management. We report a clinical case of a patient supported for an acute coronary syndrome, in a context of impaired general condition and biological inflammatory syndrome revealing a Horton's disease.