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Stack #1863343
| Question | Answer |
|---|---|
| Which one of the following phrases describes a transient ischemic attack (TIA)? A. permanent loss of vision bilaterally B. residual neurologic deficit C. duration less than 24 hours D. loss of conciousness | C. duration less than 24 hours |
| Transient partial or complete loss of vision is known as___? | amaurosis fugax |
| A normal flow disturbance along the posterior wall of the bulb is ____ | boundary layer seperation |
| _____ should be used to classify a greater than 80% diameter reduction of the origin of the ICA? | End diastolic velocity greater than 155 cm/sec |
| The innominate artery divides into the ____ and ___ arteries | Right common carotid; right subclavian |
| A characteristic of a subclavian steal is | reversal of blood flow in the vertebral artery |
| When determining the ICA:CCA ratio, the CCA velocity should be obtained from____? | Distal segment |
| Which one of the following branches of the ECA is the most commonly visualized? | Superior thyroid |
| An abdnormal shape of the spectral Doppler waveform from the ICA suggest ___? | proximal or distal disease or occlusion |
| Fibromusscular dysplasia typically affects which portion of the carotid artery? | midportion of the internal carotid artery |
| Intraoperative carotid duplex imaging identifies ____? | abnormal blood flow. |
| placement of the Doppler sampler volume should be parallel to what? | vessel walls |
| A warning sign of stroke is _____ | temporary blindness in one eye |
| A systolic velocity recorded from the origin of the ICA that is less than 125 cm/sec suggests _____? | stenosis of less than 50% diameter reduction |
| An ultrasound finding of the Doppler signal from an external carotid arter (ECA) is what wave form? | high resistence |
| What portion of the ICA is evaluated during carotid duplex imaging examinations? | petrous |
| approximately ______ strokes occur each year in the U.S. | 700,000 |
| The Doppler sample volume should be kept _____ during a carotid duplex imaging examination. | small |
| An ultrasound characteristic of the internal carotid artery (ICA) includes _____? | low resistence Doppler signal |
| A difference of greater than 20 mm HG pressure between arms suggests disease of the _____ artery. | subclavian |
| Normal vertebral arteries: A) asymmetrical B) are branches of the axillary artery C) demonstrate a high resistance Doppler signal D) demonstrate an alternating blood flow | A) asymmetrical |
| _____ is not an ultrasound finding of an ICA occlusion | reduce diastolic blood flow pattern |
| Noise caused by tissue vibration produced by turbulent flow ___? | bruit |
| The carotid body assists in regulating ____,___, and _____. | Heart rate, Blood pressure, and respiration |
| A contralateral ICA occlusion may cause the ipsilateral ICA velocities to be _____. | increased |
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