-transparent.png){kind=logo}
OBJECTIVE This study was performed to determine the usefulness of transcranial color-coded real-time sonography (TCCS) in detecting stenosis in the horizontal portion of the middle cerebral artery (MCA). METHODS Using TCCS and the incident angle correction technique, we measured the peak-systolic flow velocity in bilateral MCAs in 45 consecutive patients in whom cerebral angiography was carried out within 1 week before or after TCCS. Three patients had a stenosis of 75% or greater and four had a unilateral occlusion of the extracranial internal carotid artery (ICA) (the ICS and ICO groups, respectively). Eight patients had a stenosis of 50% or greater (one bilateral and seven unilateral) (the M1S group). Four patients had unilateral distal occlusion of the horizontal portion of the MCA (the M1O group). Twenty-six patients had no significant extra- or intracranial stenosis on the ipsilateral or contralateral side (the control group). RESULTS Mean peak-systolic flow velocity on the affected side was 83.0 +/- 20.8 cm/s in the ICS group, 59.8 +/- 23.2 cm/s in the ICO group, and 62.3 +/- 33.7 cm/s in the M1O group. In the control group, the mean peak-systolic flow velocity was 116.0 +/- 31.5 cm/s. In the M1S group, however, the mean peak-systolic flow velocity (334.2 +/- 35.7 cm/s) on the affected side always exceeded 180 cm/s (mean value +/- 2 SD in the control group), and was significantly higher than that in the other groups. The mean peak-systolic flow velocity in the M1S group increased with the grade of stenosis. CONCLUSIONS The M1S group members could easily be distinguished from the other group members by their peak-systolic flow velocity in excess of 180 cm/s. Measurement of the peak-systolic flow velocity of the MCA by TCCS may help to identify a significant stenosis in the horizontal portion of the MCA.
K Kimura, and
M Yasaka, and
K Wada, and
K Minematsu, and
T Yamaguchi, and
R Otsubo
May 1996,
AJNR. American journal of neuroradiology,
K Kimura, and
M Yasaka, and
K Wada, and
K Minematsu, and
T Yamaguchi, and
R Otsubo
October 1994,
Journal of clinical ultrasound : JCU,
K Kimura, and
M Yasaka, and
K Wada, and
K Minematsu, and
T Yamaguchi, and
R Otsubo
April 2005,
Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine,
K Kimura, and
M Yasaka, and
K Wada, and
K Minematsu, and
T Yamaguchi, and
R Otsubo
January 2021,
Ultrasound in medicine & biology,
K Kimura, and
M Yasaka, and
K Wada, and
K Minematsu, and
T Yamaguchi, and
R Otsubo
September 2016,
Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine,
K Kimura, and
M Yasaka, and
K Wada, and
K Minematsu, and
T Yamaguchi, and
R Otsubo
April 2005,
Neuroradiology,
K Kimura, and
M Yasaka, and
K Wada, and
K Minematsu, and
T Yamaguchi, and
R Otsubo
December 2012,
Ultraschall in der Medizin (Stuttgart, Germany : 1980),
K Kimura, and
M Yasaka, and
K Wada, and
K Minematsu, and
T Yamaguchi, and
R Otsubo
March 2009,
Critical care medicine,
K Kimura, and
M Yasaka, and
K Wada, and
K Minematsu, and
T Yamaguchi, and
R Otsubo
December 1990,
Stroke,
K Kimura, and
M Yasaka, and
K Wada, and
K Minematsu, and
T Yamaguchi, and
R Otsubo
June 1991,
Neurosurgery,
