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Duplex carotid sonography. Peak systolic velocity in quantifying internal carotid artery stenosis.
Author(s) -
Withers C E,
Gosink B B,
Keightley A M,
Casola G,
Lee A A,
vanSonnenberg E,
Rothrock J F,
Lyden P D
Publication year - 1990
Publication title -
journal of ultrasound in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 91
eISSN - 1550-9613
pISSN - 0278-4297
DOI - 10.7863/jum.1990.9.6.345
Subject(s) - medicine , internal carotid artery , stenosis , duplex ultrasonography , common carotid artery , diastole , doppler effect , duplex (building) , radiology , hemodynamics , ultrasound , cardiology , nuclear medicine , carotid arteries , ultrasonography , blood pressure , dna , genetics , biology , physics , astronomy
Duplex ultrasonography combining high‐resolution imaging and Doppler spectrum analysis was performed in 92 consecutive patients (total, 180 vessels) and compared with the findings of conventional arteriography. All duplex studies were categorized into four groups based upon the maximum internal carotid artery (ICA) velocity: group 1: less than 125 cm/sec; group 2: 125 to 224 cm/sec; group 3: greater than 225 cm/sec; and group 4: no flow. Sensitivities and specificities were highest when peak ICA velocity was used as one of several criteria in quantifying the degree of ICA stenosis. These additional criteria were: (1) the presence of extensive sonographically visible plaque within the ICA; (2) an abnormal spectral waveform with elevated diastolic velocity (greater than 100 cm/sec); (3) resistive pattern ("externalization") of the common carotid artery (CCA) waveform; and (4) the ratio of the right CCA peak velocity to the left of less than 0.7 or greater than 1.3. The overall accuracy for the combined groups using all criteria was 94%.