Carotid transient ischemic attacks and normal investigations: a follow-up study.

Reports on the long-term prognosis of patients with transient ischemic attacks and normal angiograms have revealed variable results, some suggesting a good prognosis while others report an outcome no different from that of patients with transient ischemic attacks and atherosclerotic vascular narrowing. Normal cerebral angiograms do not exclude disease in the heart or hematologic disorders. The prognosis for patients with transient ischemic attacks, normal angiograms, and normal results of cardiac and hematologic investigations is not known. We report our experience with 43 patients (26 men and 17 women, mean age 55.6 years) with transient ischemic attacks and normal findings on all investigations (including angiography, cranial computed tomography, echocardiography, and Holter monitoring). The patients were followed for a mean of 4.43 years. Six patients had recurrent transient ischemic attacks and six developed angina pectoris. No patient developed a stroke. In the presence of normal cerebral, cardiac, and hematologic findings, the long-term prognosis of patients with transient ischemic attacks is good. However, the development of cardiac disease during follow-up could not be predicted using the available diagnostic methods.