Which ultrasound parameter is critical for estimating the risk of stroke?

End-diastolic velocity assessment is crucial for estimating the risk of stroke, primarily because it provides important information about blood flow dynamics in the arteries, particularly the carotid arteries. Elevated end-diastolic velocity values can indicate the presence of significant stenosis, which refers to narrowing of the blood vessels. This narrowing can increase turbulence and shear stress in the blood flow, thereby heightening the risk of thrombus formation and potential embolization, both of which can lead to stroke.

Understanding end-diastolic velocity also assists in evaluating the overall vascular health of an individual. Abnormal values can signal the need for further investigation or intervention. In clinical practice, these assessments can help identify patients at higher risk so that appropriate preventative measures can be taken.

Vessel diameter measurement, while important, does not directly correlate with the risk of stroke as effectively as velocity assessments. Capillary perfusion evaluation primarily focuses on microvascular health and is not directly indicative of macrovascular issues that lead to strokes. Blood viscosity calculations can provide insight into certain conditions but do not serve as a direct measure of blood flow dynamics indicative of impending stroke.