During autopsies a few number of cases with coronary involvement by specific lesions of Horton's disease are found. It is very unusual that they may be responsible of death. In this case a white woman 79 years old present all symptoms and findings of temporal arteritis. Temporal artery biopsy proved affection. After prednisone therapy was started a tong necrosis appears and a myocardial infarction happens with collapse and death. Autopsy examination showed giant cell arteritis involving a coronary branch near myocardial fresh infarction. Four other cases of literature are summarized. In four times corticosteroide were started but coronary involvement was not stopped and coronary specific lesions responsible of death.