MRA Head Without and With IV Contrast There is no relevant literature to support the use of contrast-enhanced MRA of the head in the evaluation of ischemic stroke. MRA Head Without IV Contrast MRA of the head is a useful initial screening tests for intracranial steno-occlusive disease in the setting of late presenting stroke, owing to the lack of indication for emergent EVT in delayed presenting strokes and relatively rapid noninvasive nature of the examination without the need for IV contrast, although the clinical value of this information is controversial [22,23,69]. MRA Neck Without and With IV Contrast MRA of the neck may be useful in screening for extracranial carotid disease given the lack of urgency in evaluation of delayed presenting strokes. Current AHA guidelines recommend noninvasive imaging of the cervical carotid arteries for patients with minor stroke who are candidates for CEA or stenting, within 24 hours of hospitalization or 48 hours of onset due to the high early risk of recurrent stroke in patients with symptomatic carotid stenosis [12,13]. Noncontrast MRA of the neck tends to overestimate the degree of carotid stenosis. In the setting of cryptogenic stroke, MRA can be useful to identify unstable plaque or other culprit lesions [83-85]. MRA Neck Without IV Contrast MRA of the neck may be useful in screening for extracranial carotid disease given the lack of urgency in the evaluation of delayed presenting strokes. Noncontrast MRA of the neck tends to overestimate the degree of carotid stenosis and is often limited in evaluation of vertebral origin disease due to respiratory motion artifacts. Contrast- enhanced MRA may more accurately quantify stenosis and identify ostial stenoses. In the setting of cryptogenic stroke, MRA can be useful to identify unstable plaque or other culprit lesions [83-85].
Cerebrovascular Diseases Stroke and Stroke Related Conditions PCAs. MRA Head Without and With IV Contrast There is no relevant literature to support the use of contrast-enhanced MRA of the head in the evaluation of ischemic stroke. MRA Head Without IV Contrast MRA of the head is a useful initial screening tests for intracranial steno-occlusive disease in the setting of late presenting stroke, owing to the lack of indication for emergent EVT in delayed presenting strokes and relatively rapid noninvasive nature of the examination without the need for IV contrast, although the clinical value of this information is controversial [22,23,69]. MRA Neck Without and With IV Contrast MRA of the neck may be useful in screening for extracranial carotid disease given the lack of urgency in evaluation of delayed presenting strokes. Current AHA guidelines recommend noninvasive imaging of the cervical carotid arteries for patients with minor stroke who are candidates for CEA or stenting, within 24 hours of hospitalization or 48 hours of onset due to the high early risk of recurrent stroke in patients with symptomatic carotid stenosis [12,13]. Noncontrast MRA of the neck tends to overestimate the degree of carotid stenosis. In the setting of cryptogenic stroke, MRA can be useful to identify unstable plaque or other culprit lesions [83-85]. MRA Neck Without IV Contrast MRA of the neck may be useful in screening for extracranial carotid disease given the lack of urgency in the evaluation of delayed presenting strokes. Noncontrast MRA of the neck tends to overestimate the degree of carotid stenosis and is often limited in evaluation of vertebral origin disease due to respiratory motion artifacts. Contrast- enhanced MRA may more accurately quantify stenosis and identify ostial stenoses. In the setting of cryptogenic stroke, MRA can be useful to identify unstable plaque or other culprit lesions [83-85].