NDLI: Peak Systolic Velocity Measured by Continuous-Wave Doppler Ultrasonography without Angle Correction in Patients with Internal Carotid Artery Stenosis.

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Peak Systolic Velocity Measured by Continuous-Wave Doppler Ultrasonography without Angle Correction in Patients with Internal Carotid Artery Stenosis.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Sakamoto, Yuki Sato, Kazuaki Kobayashi, Junpei Koga, Masatoshi Nagatsuka, Kazuyuki Minematsu, Kazuo Toyoda, Kazunori
Description	Country affiliation: Japan Author Affiliation: Sakamoto Y ( Department of Cerebrovascular Medicine, National Cerebral and Cardiovascular Center, Suita, Japan.); Sato K ( Department of Cerebrovascular Medicine, National Cerebral and Cardiovascular Center, Suita, Japan.); Kobayashi J ( Department of Cerebrovascular Medicine, National Cerebral and Cardiovascular Center, Suita, Japan.); Koga M ( Division of Stroke Care Unit, National Cerebral and Cardiovascular Center, Suita, Japan. Electronic address: koga@ncvc.go.jp.); Nagatsuka K ( Department of Neurology, National Cerebral and Cardiovascular Center, Suita, Japan.); Minematsu K ( Department of Cerebrovascular Medicine, National Cerebral and Cardiovascular Center, Suita, Japan.); Toyoda K ( Department of Cerebrovascular Medicine, National Cerebral and Cardiovascular Center, Suita, Japan.)
Abstract	BACKGROUND: Peak systolic velocity (PSV) is measured with pulse-wave (PW) Doppler with angle correction in patients with internal carotid artery stenosis (ICAS). However, the correlation between conventional angiography and PSV shows considerable scattering. We hypothesized that measuring PSV without angle correction would lead to better inter-rater reliability. This hypothesis was tested using a sector probe and continuous-wave (CW) Doppler without angle correction. METHODS: Consecutive patients with more than 50% ICAS were enrolled from a prospective database. PSV was measured with PW Doppler with angle correction (PW PSV) and CW Doppler without angle correction (CW PSV) by 2 examiners. The inter-rater reliabilities of PW PSV and CW PSV were analyzed by Spearman's rank correlation test. RESULTS: A total of 37 ICAS sites (median 67 [interquartile range 57-78] % stenosis) were enrolled. Measuring PSV using a sector probe insonating nearly parallel to the flow was feasible in all cases. Inter-rater reproducibility of CW PSV (Spearman's ρ = .810) was similar to that of PW PSV (Spearman's ρ = .796). When limited to patients with a PSV greater than 200 cm/s with both PW Doppler examinations (25 ICAS sites), inter-rater reliability was relatively higher for CW PSV (Spearman's ρ = .674) than for PW PSV (Spearman's ρ = .423). CONCLUSIONS: Measuring PSV with CW Doppler using a sector probe was feasible. Inter-rater reliability was similar between PW Doppler with angle correction and CW Doppler without angle correction in evaluating PSV in patients with ICAS. CW Doppler appears to have better inter-rater reproducibility than PW Doppler in assessing high PSV.
File Format	HTM / HTML
ISSN	10523057
Issue Number	6
Journal	Journal of Stroke and Cerebrovascular Diseases
Volume Number	25
e-ISSN	15328511
Language	English
Publisher	Elsevier
Publisher Date	2016-06-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Cardiology
Content Type	Text
Resource Type	Article
Subject	Rehabilitation Neurology (clinical) Surgery Cardiology and Cardiovascular Medicine

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