Stroke is a sudden focal neurological deficit, presumed to be vascular in origin by abrupt interruption of vascularization in the brain. Doppler ultrasound of supra-aortic trunks is one of the essential etiological assessments of ischemic strokes. The objective of our study is to describe the epidemic-ultrasound aspect of the presence of atheromatic plaques in the vessels of the neck as part of an ischemic stroke. We did a 24-month retrospective descriptive study. We collected 75 records of patients who received Doppler ultrasound of supra-aortic trunks for etiological ischemic stroke research. The average age of patients was 54 years with a sex ratio of 0.6. Of the collected records, 24 (68%) had no vascular abnormalities in the neck and 11 (32%) had vascular abnormalities such as mediacalcosis (18%), hypertrophy of the medial intima (10%) and atheroma plaques (8%). Plaque may be recent (8%) or calcified (3%). Stenosis occurs in 5% of cases. In our study, we found no aneurysm or dissection of the vessels in the neck. Doppler ultrasound of supra-aortic trunks is a useful and accessible examination for the etiological exploration of ischemic stroke in Madagascar.