Why the study?
Does the peak frequency ratio (PFR) measurement accurately detect internal carotid artery stenosis?
Population
642 vessels from patients with suspected internal carotid artery stenosis
Comparison
Peak frequency ratio measurement using pulsed… vs Angiography (reference standard)
Design
Cross-sectional
Authors
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Supports PD/SA for carotid stenosis screening; leaves open prospective validation before practice change.
Does the peak frequency ratio (PFR) measurement accurately detect internal carotid artery stenosis?
Pulsed Doppler with spectral analysis using the peak frequency ratio is a useful screening parameter for suspected internal carotid artery stenosis, whereas continuous-wave Doppler has an unacceptably high false-negative rate.
Keagy et al. (1982) studied this question.
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