Which of the comments is true regarding the use of transcranial Doppler ultrasound for cerebral artery vasospasm following aneurysmal subarachnoid hemorrhage?
A. The most reliable blood vessels for evaluating vasospasm via transcranial Doppler ultrasound is the anterior cerebral artery and vertebral artery Wrong Choice!
B. If there is vasospasm (defined as mean velocity >120 cm/s) present on transcranial Doppler, there will be clinical changes Wrong Choice!
C. Lindegaard ratio can help evaluate the etiology of elevated mean velocities by comparing the middle cerebral artery and ipsilateral extracranial carotid artery velocities Correct Choice
D. Following intra-aterial treatment with verapamil, transcranial Doppler velocities will typically increase due to hyperemia Wrong Choice!
Answer:C
Which of the comments is true regarding the use of transcranial Doppler ultrasound for cerebral artery vasospasm following aneurysmal subarachnoid hemorrhage?
A. The most reliable blood vessels for evaluating vasospasm via transcranial Doppler ultrasound is the anterior cerebral artery and vertebral artery Wrong Choice! B. If there is vasospasm (defined as mean velocity >120 cm/s) present on transcranial Doppler, there will be clinical changes Wrong Choice! C. Lindegaard ratio can help evaluate the etiology of elevated mean velocities by comparing the middle cerebral artery and ipsilateral extracranial carotid artery velocities Correct Choice D. Following intra-aterial treatment with verapamil, transcranial Doppler velocities will typically increase due to hyperemia Wrong Choice!