Is Carotid-Vertebral Doppler Ultrasonography Necessary for Patients With Vertigo?

All Doppler ultrasonography measurements will be made in a dimly lit room at room temperature, with the patient in the supine position, the head slightly hyperextended, the patient looking to the left when measuring the right side, and the patient looking to the right when measuring the left side. In all patients, common carotid artery (CCA), internal carotid artery (ICA) and vertebral artery (VA) gray scale and color Doppler ultrasonography wşll be performed using the GE 9L Linear Probe. Color Doppler examination will be performed with a frequency of 4.0/8.0 MHz.