Angle between the common and internal carotid arteries detected by ultrasound is related to intima-media thickness among those with atherosclerotic disease

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Web End = Environ Health Prev Med (2015) 20:216223 DOI 10.1007/s12199-015-0453-7

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Web End = Angle between the common and internal carotid arteries detected by ultrasound is related to intima-media thickness among those with atherosclerotic disease

Satoshi Daitoku Toshinori Yuasa Hiroshi Tsunenari Shigeho Maenohara

Kazuharu Mine Yuichi Tamatsu Kazuyuki Shimada

Chihaya Koriyama Mitsuru Ohishi Masahisa Horiuchi

Received: 3 December 2014 / Accepted: 19 February 2015 / Published online: 13 March 2015 The Japanese Society for Hygiene 2015

AbstractObjectives Although carotid artery structural variations have been detected by ultrasound, their clinical signicance is not fully understood. The objective of this study was to determine whether the angle between the common carotid artery (CCA) and the internal carotid artery (ICA), designated angle a, an ultrasound-detectable carotid artery structural variation, is related to carotid artery intima-media thickness (IMT), a surrogate marker for carotid atherosclerosis.

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S. Daitoku M. Horiuchi (&)

Department of Hygiene and Health Promotion Medicine, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan e-mail: [email protected]

S. Daitoku T. Yuasa M. Ohishi (&)

Department of Cardiovascular Medicine and Hypertension, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan e-mail: [email protected]

S. Daitoku H. Tsunenari S. Maenohara

Kagoshima Kouseiren Hospital, Kagoshima, Japan

K. Mine Y. Tamatsu K. Shimada

Department of Gross Anatomy Section, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan

C. KoriyamaDepartment of Epidemiology and Preventive Medicine, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan

Methods As a cross-sectional study, we measured angle a in routine carotid artery ultrasounds from 176 subjects (130 men) with atherosclerotic disease/risk factors that attended Kouseiren Hospital in Kagoshima City, Japan between August 2007 and April 2009. We evaluated the correlation between the angle a and CCA- or ICA-IMT.

Results Angle a was weakly correlated with age but signicantly correlated with ICA-IMT. The correlation was stronger in subjects...