RVT – Cerebrovascular: Questions With Correct
Solutions
Which is NOT true regarding carotid bruit?
- Severe stenosis may cause a bruit
- The absence of a bruit rules out significant stenosis
- The presence of a bruit is significant
- A cervical bruit might arise from stenosis of the external carotid artery
- A bruit extending into diastole suggests severe stenosis Accurate
Answer:- - The absence of a bruit rules out significant stenosis
A 56 year-old patient reports loss of vision in her left eye two days ago, with
total resolution in 10 minutes. Yesterday morning she developed weakness
and numbness in her right hand and was unable to hold her coffee cup. This
afternoon her hand strength is about 90% normal, with normal sensation.
Clinically she has:
- Amaurosis fugax
- Transient ischemic attack
- Migraine
- Stroke
- Lacunar infarct Accurate Answer:- - Stroke
A right-handed patient experiences a 30-minute episode of dysphasia. Which
area of circulation is suspect?
- Right hemisphere
- Left hemisphere
- Occipital cortex
- Vertebrobasilar territory
- Brainstem Accurate Answer:- - Left hemisphere
The most common medical treatment of acute ischemic stroke consists of:
- Aspirin
- Dextran
- Heparin
- rtPA
- Dipyridamole Accurate Answer:- - rtPA
In TCD, the normal direction of flow in the anterior cerebral artery is:
,- Toward the beam
- Away from the beam
- Bidirectional
- Dependent on the cardiac cycle
- Not detectable with TCD Accurate Answer:- - Away from the beam
The incidence of new strokes per year is:
- 150,000
- 250,000
- 700,000
- 1,000,000
- 2,600,000 Accurate Answer:- - 700,000
Advantages of angiography over duplex carotid studies include all EXCEPT:
- Ability to visualize intracranial collaterals
- Superiority at calling ulceration
- Ability to visualize the entire cerebral vasculature
- Unlimited repeatability
- Ability to determine siphon stenosis Accurate Answer:- - Unlimited
repeatability
On ophthalmologic examination, a bright yellow spot is noted within a branch
artery. This is a Hollenhorst plaque.
- True
- False Accurate Answer:- - True
In TCD, the normal direction of flow in the middle cerebral artery is:
- Toward the beam
- Away from the beam
- Bidirectional
- Dependent on the cardiac cycle
- Not detectable with TCD Accurate Answer:- - Toward the beam
Which of the following would alter the frequency shift of the internal carotid
artery Doppler signal?
- Tapering of the vessel from the bulb to the distal visualized segment
- Increasing the transmitted frequency
- Readjusting the angle-correct cursor
- Lowering the system threshold sensitivity
, - A and B Accurate Answer:- - A and B
The TCD window used for assessing the ophthalmic artery and carotid siphon
is:
- Temporal
- Suboccipital
- Orbital
- Submandibular
- Nasal Accurate Answer:- - Orbital
A hemispheric stroke usually affects:
- The anterior cerebral artery distribution and the ipsilateral side of the body
- The middle cerebellar artery distribution and the ipsilateral side of the body
- The external carotid distribution, and may affect one or both sides of the
body
- The anterior cerebellar artery distribution and the contralateral side of the
body
- The middle cerebral artery distribution and the contralateral side of the
body Accurate Answer:- - The middle cerebral artery distribution and
the contralateral side of the body
The most prevalent type of stroke is:
- Aneurysmal
- Hemorrhagic
- Septic embolic
- Venous thrombotic
- Ischemic Accurate Answer:- - Ischemic
Among the chief limitations of continuous-wave Doppler is (are):
- Depth information is not possible; precise location of flow pattern cannot be
determined
- The two-transducer system is inherently more expensive
- Polarity of the reflected signal frequency shift cannot be determined;
direction of blood flow cannot be defined
- FFT spectral analysis cannot be applied to continuous-wave Doppler signal
information
- The sample volume is too small to interrogate deeper vessels Accurate
Answer:- - Depth information is not possible; precise location of flow
pattern cannot be determined
Solutions
Which is NOT true regarding carotid bruit?
- Severe stenosis may cause a bruit
- The absence of a bruit rules out significant stenosis
- The presence of a bruit is significant
- A cervical bruit might arise from stenosis of the external carotid artery
- A bruit extending into diastole suggests severe stenosis Accurate
Answer:- - The absence of a bruit rules out significant stenosis
A 56 year-old patient reports loss of vision in her left eye two days ago, with
total resolution in 10 minutes. Yesterday morning she developed weakness
and numbness in her right hand and was unable to hold her coffee cup. This
afternoon her hand strength is about 90% normal, with normal sensation.
Clinically she has:
- Amaurosis fugax
- Transient ischemic attack
- Migraine
- Stroke
- Lacunar infarct Accurate Answer:- - Stroke
A right-handed patient experiences a 30-minute episode of dysphasia. Which
area of circulation is suspect?
- Right hemisphere
- Left hemisphere
- Occipital cortex
- Vertebrobasilar territory
- Brainstem Accurate Answer:- - Left hemisphere
The most common medical treatment of acute ischemic stroke consists of:
- Aspirin
- Dextran
- Heparin
- rtPA
- Dipyridamole Accurate Answer:- - rtPA
In TCD, the normal direction of flow in the anterior cerebral artery is:
,- Toward the beam
- Away from the beam
- Bidirectional
- Dependent on the cardiac cycle
- Not detectable with TCD Accurate Answer:- - Away from the beam
The incidence of new strokes per year is:
- 150,000
- 250,000
- 700,000
- 1,000,000
- 2,600,000 Accurate Answer:- - 700,000
Advantages of angiography over duplex carotid studies include all EXCEPT:
- Ability to visualize intracranial collaterals
- Superiority at calling ulceration
- Ability to visualize the entire cerebral vasculature
- Unlimited repeatability
- Ability to determine siphon stenosis Accurate Answer:- - Unlimited
repeatability
On ophthalmologic examination, a bright yellow spot is noted within a branch
artery. This is a Hollenhorst plaque.
- True
- False Accurate Answer:- - True
In TCD, the normal direction of flow in the middle cerebral artery is:
- Toward the beam
- Away from the beam
- Bidirectional
- Dependent on the cardiac cycle
- Not detectable with TCD Accurate Answer:- - Toward the beam
Which of the following would alter the frequency shift of the internal carotid
artery Doppler signal?
- Tapering of the vessel from the bulb to the distal visualized segment
- Increasing the transmitted frequency
- Readjusting the angle-correct cursor
- Lowering the system threshold sensitivity
, - A and B Accurate Answer:- - A and B
The TCD window used for assessing the ophthalmic artery and carotid siphon
is:
- Temporal
- Suboccipital
- Orbital
- Submandibular
- Nasal Accurate Answer:- - Orbital
A hemispheric stroke usually affects:
- The anterior cerebral artery distribution and the ipsilateral side of the body
- The middle cerebellar artery distribution and the ipsilateral side of the body
- The external carotid distribution, and may affect one or both sides of the
body
- The anterior cerebellar artery distribution and the contralateral side of the
body
- The middle cerebral artery distribution and the contralateral side of the
body Accurate Answer:- - The middle cerebral artery distribution and
the contralateral side of the body
The most prevalent type of stroke is:
- Aneurysmal
- Hemorrhagic
- Septic embolic
- Venous thrombotic
- Ischemic Accurate Answer:- - Ischemic
Among the chief limitations of continuous-wave Doppler is (are):
- Depth information is not possible; precise location of flow pattern cannot be
determined
- The two-transducer system is inherently more expensive
- Polarity of the reflected signal frequency shift cannot be determined;
direction of blood flow cannot be defined
- FFT spectral analysis cannot be applied to continuous-wave Doppler signal
information
- The sample volume is too small to interrogate deeper vessels Accurate
Answer:- - Depth information is not possible; precise location of flow
pattern cannot be determined
