A 52 y.o. man has recurrent transient ischemic attacks. Auscultation of the carotid arteries detects murmur. What diagnostic method is necessary to apply first?

Answer options

1. Cerebral angiography
2. CT of the brain
3. Electroencephalography
4. Ultrasound dopplerography
5. MRI of the brain

Explanation

Ultrasound dopplerography is medical ultrasonography that employs the Doppler effect to generate imaging of the movement of tissues and body fluids (usually blood) and their relative velocity to the probe. It measures the velocity of blood flow through the brain's blood vessels. They are used as tests to help diagnose emboli, stenosis, vasospasm from a subarachnoid hemorrhage (bleeding from a ruptured aneurysm), and other problems such as recurrent transient ischemic attacks.