What does this research mean for the field?

The ratio of peak systolic velocity in the internal carotid artery to the common carotid artery (VICA/VCCA) is an accurate indicator of the degree of internal carotid artery stenosis, with ratios above 1.5 identifying high-grade stenoses. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

This study aims to evaluate the flow velocity patterns in normal and stenotic carotid arteries using duplex scanning.

January 1, 1980StrokeOpen Access

Carotid artery velocity patterns in normal and stenotic vessels.

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Why the study?

Does the VICA/VCCA ratio measured by duplex scanning accurately indicate the degree of internal carotid artery stenosis compared to angiography?

Population

54 subjects, evaluating a total of 98 common and internal carotid arteries.

Comparison

Duplex scanning to measure the ratio of mean… vs Angiography.

Design

Cross-sectional

Authors

WBWilliam M. BlackshearGrosse Pointe Public Library DPDavid J. PhillipsUniversity of Bath PCP M ChikosUnited States Department of Veterans Affairs

Discussion

Member takes

Implication

Supports duplex VICA/VCCA ratio for noninvasive ICA stenosis grading; leaves open prospective validation against angiography.

Key Points

This study aims to evaluate the flow velocity patterns in normal and stenotic carotid arteries using duplex scanning.
Measured flow velocity using duplex scanning in 68 carotid arteries from patients and 30 from healthy controls.
Calculated mean peak ICA and CCA velocities to determine the velocity ratio (VICA/VCCA).
Classified arteries based on velocity ratios to assess the degree of stenosis.
In 36 normal arteries, the VICA/VCCA was below 0.8; in 21 high-grade stenotic arteries, it was above 1.5.
Sixty-one percent of vessels with less than 10 to 55% diameter reduction had a velocity ratio between 0.8 and 1.5.
Only 10% of ICA's with any stenotic lesion were incorrectly classified as normal.

Structured PICO

Does the VICA/VCCA ratio measured by duplex scanning accurately indicate the degree of internal carotid artery stenosis compared to angiography?

Population

54 subjects (39 patients who had undergone prior angiography and 15 healthy young controls), evaluating a total of 98 common and internal carotid arteries.

Intervention

Duplex scanning (B-mode imaging with pulsed Doppler flow velocity detector) to measure the ratio of mean peak internal carotid artery (ICA) velocity to mean peak common carotid artery (CCA) velocity at systole (VICA/VCCA).

Comparator

Angiography (reference standard for degree of stenosis).

Outcome

Accuracy of the VICA/VCCA ratio in indicating the degree of ICA stenosis.surrogate

The VICA/VCCA ratio measured by duplex scanning is an accurate, non-invasive indicator of the degree of internal carotid artery stenosis.

Cite This Study

Blackshear et al. (1980) studied this question.

synapsesocial.com/papers/6a1286cfc031bb6829a6cda4 https://doi.org/10.1161/01.str.11.1.67

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Carotid artery velocity patterns in normal and stenotic vessels.

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Carotid artery velocity patterns in normal and stenotic vessels.

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Also Consider

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