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Angiology
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The Impact of Different Spectral Doppler Criteria on the Proportion of High-Grade Internal Carotid Artery Stenosis in Patients Undergoing Duplex Scanning

Karl Logason, MD

Departments of Surgery, University Hospital, Uppsala, Sweden.

Sadettin Karacagil, MD, PhD

Departments of Surgery, University Hospital, Uppsala, Sweden.

A. Tulga Ulus, MD

Departments of Surgery, University Hospital, Uppsala, Sweden.

Hans-Göran Hardemark, MD, PhD

Departments of Neurology, University Hospital, Uppsala, Sweden.

Aim: To investigate the impact of different spectral Doppler criteria on the proportion of high- grade ICA stenosis in patients undergoing carotid artery duplex scanning.

Material and methods: Duplex scans of 4,548 internal carotid arteries (ICA) in 2,349 patients were retrospectively analyzed. The following different criteria were applied for each scan for definition of ICA stenosis ≥ 70%: Criteria I = ICA peak systolic velocity (PSV) > 130 cm/sec and ICA end-diastolic (EDV) > 100 cm/sec, Criteria II = PSV ICA/common carotid artery (CCA) ratio > 4, Criteria III = ICA PSV ≥ 230 cm/sec, Criteria IV = ICA PSV > 230 cm/sec and/or ICA EDV ≥ 100 cm/sec and/or PSV ICA/CCA ratio ≥ 3.2.

Results: The frequency of detecting a ≥ 70% ICA stenosis with criteria I, II, III, and IV were 5.5%, 6.8%, 8.4%, and 9.6%, respectively (p < 0.05).

Conclusion: The use of various duplex criteria significantly affected the number of scans receiving a diagnosis of ICA stenosis of ≥ 70%.

Angiology, Vol. 53, No. 3, 297-301 (2002)
DOI: 10.1177/000331970205300307
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