Acceleration time ratio for the assessment of extracranial internal carotid artery stenosis

Hidehiro Takekawa; Keisuke Suzuki; Etsuo Takada; Hideaki Tanaka; Ryuta Okabe; Masanari Yamamoto; Yuko Ishii; Madoka Okamura; Koichi Hirata

doi:10.1007/s10396-013-0471-2

Acceleration time ratio for the assessment of extracranial internal carotid artery stenosis

J Med Ultrason (2001). 2014 Jan;41(1):63-7. doi: 10.1007/s10396-013-0471-2. Epub 2013 Jul 3.

Authors

Hidehiro Takekawa¹, Keisuke Suzuki², Etsuo Takada³, Hideaki Tanaka², Ryuta Okabe⁴, Masanari Yamamoto⁴, Yuko Ishii⁴, Madoka Okamura⁴, Koichi Hirata²

Affiliations

¹ Stroke Division, Department of Neurology, Dokkyo Medical University, 880 Kitakobayashi, Mibu, Shimotsuga, Tochigi, 321-0293, Japan. htakekawa-jscn@umin.ac.jp.
² Department of Neurology, Dokkyo Medical University, Tochigi, Japan.
³ Center of Medical Ultrasonics, Dokkyo Medical University, Tochigi, Japan.
⁴ Stroke Division, Department of Neurology, Dokkyo Medical University, 880 Kitakobayashi, Mibu, Shimotsuga, Tochigi, 321-0293, Japan.

PMID: 27277634
DOI: 10.1007/s10396-013-0471-2

Abstract

Purpose: To apply the acceleration time (AcT) ratio as an additional marker for diagnosing internal carotid artery (ICA) stenosis.

Methods: Carotid artery sonography was performed in 140 patients, and the AcT ratio was calculated as the AcT of the ICA divided by the AcT of the ipsilateral common carotid artery, and compared with diameter stenosis.

Results: There was a significant correlation between diameter stenosis and the AcT ratio. The receiver operating characteristic curve revealed a cutoff level of 1.5, with 90.0 % sensitivity and 93.5 % specificity for stenosis >65 %.

Conclusion: Our results indicate that applying the AcT ratio can help in the diagnosis of ICA stenosis.

Keywords: Acceleration time ratio; Carotid artery ultrasonography; Internal carotid artery; Stenosis.