URR Cerebrovascular Flashcards
-first major branch of the aortic arch
-right CCA and right subclavian A are the only branches
Innominate A or brachiocephalic
the right CCA originates from where?
innominate A
left CCA originates from where?
aortic arch
most common location of atherosclerosis?
CCA bif
anterior/medial branch of CCA?
ECA
ECA how in diameter compared to ICA?
smaller
branches of ECA?
-sup thyroid (FIRST)
-lingual
-ascending pharyngeal
-facial a
-occipital a
-posterior curical
superficial temporals
anterior branch of CCA that supplies mouth and tounge?
lingual A
posterior branch of ECA that supplies pharynx?
ascending pharyngeal
supplies scalp?
occipital a
artery used to perform temporal tap?
superficial temporal artery
resistance of ECA?
high
normal PSV of ECA?
<150 cm/sec
posterior/lateral branch of CCA?
ICA
distal ICA courses anterior then medial coursing in an āSā shape. What is this called?
siphon area
does the ICA have any visible branches?
NO
does the ICA respond to temporal taps?
NO
the ICA supplies what percentage to blood to the brain?
75%
first branch of ICA?
ophthalmic artery
-supplies eyes, nose, forehead, and brain
the vertebral artery supplies how much blood to the cerebrum?
10-25%
which vertebral artery is usually longer?
left
normal PSV for vertebral artery?
<50cm/sec
the subclavian supplies blood to what?
vertebral artery and arm
variant where subclavian artery is direct branch of Ao?
abberant artery
resistance of subcalvian?
high
waveform of subclavian?
triphasic
branch of subclavian artery?
vertebral
-internal mammary artery
-thyrocervical and costocervical
left and right vertebral artery merge to form a single what?
basilar artery
branches of the vertebral artery supply blood to what?
superior cerebellum and portions of brain stem
bifurcation of teh vertebral arteries at the circle of willis to form what artery?
cerebral
the circle of willis supplies blood to what?
all lobes of the cerebrum
the circle of willis is usually complete in about what percentage of patients?
50%
anterior cerebral A supplies what?
frontal and parietal brain
mid cerebral artery supplies what?
frontal, parietal, and temporal
posterior cerebral artery supplies what?
temporal and occipital brain