Surgical and Radiologic Anatomy

, Volume 39, Issue 6, pp 657–662 | Cite as

Morphologic classification of the right auricule on 256-slice computed tomography

  • Cai-Ying LiEmail author
  • Bu-Lang GaoEmail author
  • Tong Pan
  • Cheng Xiang
  • Xiao-Wei Liu
  • Hai-Qing Yang
  • Lan-Ying Yi
  • Qi-Bin Liao
Original Article



To investigate the shape of right auricule on 256-slice computed tomography (CT).

Materials and methods

Five hundred people (250 men, age range 16–84 years) who had cardiac multidetector CT angiography were recruited in this study. All patients had normal sinus rhythm with normal blood pressure (<140/90 mmHg for systolic/diastolic pressure). The morphology of the right auricule was studied and compared after reconstruction of the raw images.


All patients successfully had cardiac CT angiography (100%), and the right auricule morphology was divided into five types and nine subtypes, including Type I of triangular shape (Ia and Ib), Type II of M shape (IIa and IIb), Type III of L shape (IIIa and IIIb), Type IV of reverse L shape (IVa and IVb), and Type V of balanced shape. The most common type of right auricule is Type IV (28.4%) followed by Type II (24.0%), whereas the least common is Type V (11.0%). Type Ia was present significantly (P < 0.0001) more frequently in females than in males, whereas Type IIa significantly (P = 0.042) more frequently in males than females. No other significant (P > 0.05) sex difference existed in the constitution ratio of the types. The normal angle was greater in Type Ib than in Ia. The greater the normal angle in Type I, the greater the deviation of the right auricule tip towards the left.


A good understanding of the right auricule anatomical morphology can better guide atrial pacing, radiofrequency ablation and other surgical procedures while preventing possible intra-procedural complications.


Right auricule Anatomy Multiple slice computed tomography Heart Right atrium 


Compliance with ethical standards

Conflict of interest

The authors declared that they have no conflict of interest in publication of this article.


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Copyright information

© Springer-Verlag France 2016

Authors and Affiliations

  1. 1.Department of Medical Imaging, The Second HospitalHebei Medical UniversityShijiazhuangPeople’s Republic of China
  2. 2.Department of Medical Research, Shijiazhuang First HospitalHebei Medical UniversityShijiazhuangPeople’s Republic of China

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