Lecture 7: VA & SUBLC Arteries Flashcards
what are indications for a vertebral exam?
VBI symptoms
what happens to the brachial pulse that can indicate a subcl artery exam?
pulse can decrease
what abnormal waveform can indicate a subclavian artery exam?
decreased or retrograde vertebral artery waveform
turbulent flow or bruit in the supraclavicular region can indicate what type of exam?
subclavian artery exam
where does the vertebral artery take off from?
proximal subclavian artery
what part of the spine does the vertebral artery travel between?
the transverse process
where does the vertebral artery enter the cranium?
at the foramen magnum
what imaging modality is better than U/S to visualize the vertebral artery?
MRI
a normal vertebral artery waveform can have a broader bandwidth. T/F?
true
normal PSV of vertebral artery?
20-60 cm/sec
which vertebral artery is usually larger?
left vertebral artery
what can reversed flow in the vertebral artery indicate?
subclavian steal
why does subclavian steal happen?
there is high grade stenosis or occlusion in the innominate artery or subclavian artery prox to VA
when there is subclavian steal on one side, what happens to the waveform of the vertebral artery on the contralateral side?
it changes to high resistance
a brachial blood pressure difference of ____ occurs with a subclavian steal
15-20 mm/Hg
