Rightward and leftward head rotation influence the geometric features of the healthy carotid bifurcation

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding


Posture changes may influence the geometry and hemodynamics of the carotid bifurcation [1]. As a result, head rotation may cause geometric changes that alter the hemodynamic variables previously cited to correlate with the development of atherosclerosis. Such variables include oscillating wall shear stress (WSS) and particle residence times. Glor et al. [1] had reported changes in the right carotid bifurcation geometry with leftward rotation of the head. We have previously reported that geometric differences in the right and left carotid bifurcation occur with a rightward rotation of the head [2]. To investigate the geometric changes in the carotid geometry that occur in the prone sleeping position with rightward and leftward head rotation, we have performed studies in two healthy young volunteers. We defined specific geometric parameters of the carotid bifurcation, such as bifurcation angle, internal carotid artery (ICA) angle, ICA planarity angle, in-plane asymmetry angle, tortuosity, curvature, area and diameter ratios, and compared their corresponding values in three head postures: 1) the supine neutral position, 2) the prone sleeping position with head rotation to the right (∼80 degrees), and 3) the prone sleeping position with head rotation to the left (∼80 degrees).


  • Nicolas Aristokleous
  • Ioannis Seimenis
  • Yannis Papaharilaou
  • Georgios Georgiou
  • Brigitta C. Brott
  • Andreas S. Anayiotos
External organisations
  • Cyprus University of Technology
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Other Medical Engineering
Original languageEnglish
Title of host publicationASME 2011 Summer Bioengineering Conference, SBC 2011
Number of pages2
Publication statusPublished - 2011 Dec 1
Publication categoryResearch
Externally publishedYes
EventASME 2011 Summer Bioengineering Conference, SBC 2011 - Farmington, PA, United States
Duration: 2011 Jun 222011 Jun 25


ConferenceASME 2011 Summer Bioengineering Conference, SBC 2011
CountryUnited States
CityFarmington, PA