title: Anatomic variations of the branches of the aortic arch in a Peruvian population.
abstract: OBJECTIVE
  Previous publications from two countries in South America found one anatomical variation not previously reported in the rest of the world, which in turn give some clues with regard to a racial difference. The objective of the present study is to describe variations in the anatomical distribution of the branches of the aortic arch in a Peruvian population.
  
  
  OBJECTIVE
  To describe variations in the anatomical distribution of the branches of the aortic arch in a Peruvian population.
  
  
  METHODS
  A descriptive study of patients who underwent a tomography angiography of the aorta was performed. We analyzed the reports that showed the description of the variations of the branches of the aortic arch based on the eight types currently described in the literature.
  
  
  RESULTS
  From 361 analyzed reports, 282 patients (78.12%) had a normal aortic arch configuration (type I; aortic arch gives rise to the brachiocephalic trunk, left common carotid and left subclavian arteries); followed by type II (left common carotid artery as a branch of the aorta) with 41 patients (11.36%); and type IX (common ostium for the brachiocephalic trunk and the left common carotid artery) with 25 patients (6.93%). The latter and two other types are new variations.
  
  
  CONCLUSIONS
  Aortic Arch Type I, Type II and Type IX were the most frequent variations in this Peruvian study. Additionally, we also found two more new types that have not been previously described in the literature. Further investigation regarding these variations is needed in order to assess a racial factor in South America and possible relationships with clinical or surgical events.
authors.affiliation: Universidad Peruana Cayetano Heredia, Lima, Perú. Address: Av. Honorio Delgado 430, Urb. Ingeniería San Martín de Porres, Lima, Perú. Email: julioarturo30@gmail.com.
authors.forename: Julio Arturo
authors.initials: JA
authors.lastname: Huapaya
authors.affiliation: Universidad Peruana Cayetano Heredia, Lima, Perú
authors.forename: Kristhy
authors.initials: K
authors.lastname: Chávez-Trujillo
authors.affiliation: Neuroradiology Department, Johns Hopkins Hospital, Baltimore, Maryland, United States.
authors.forename: Miguel
authors.initials: M
authors.lastname: Trelles
authors.affiliation: Servicio de Cardiología Hospital Nacional Cayetano Heredia, Lima, Perú
authors.forename: Roy
authors.initials: R
authors.lastname: Dueñas Carbajal
authors.affiliation: Universidad Peruana Cayetano Heredia, Lima, Perú
authors.forename: Renato
authors.initials: R
authors.lastname: Ferrandiz Espadin
mesh_terms: D063405:Anatomic Variation; D001013:Aorta, Thoracic / Q000002:abnormalities / Q000033:anatomy & histology*; D001027:Aortography / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D010568:Peru; D014057:Tomography, X-Ray Computed / Q000379:methods*
keywords: aorta torácica; tomografía; variantes anatómicas