Japanese Journal of Radiology

, 29:576

Interatrial shunt: diagnosis of patent foramen ovale and atrial septal defect with 64-row coronary computed tomography angiography

  • Dilek Kosehan
  • Kayihan Akin
  • Asli Koktener
  • Banu Cakir
  • Ayse Aktas
  • Mehmet Teksam
Original Article

DOI: 10.1007/s11604-011-0602-x

Cite this article as:
Kosehan, D., Akin, K., Koktener, A. et al. Jpn J Radiol (2011) 29: 576. doi:10.1007/s11604-011-0602-x
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Abstract

Purpose

The aim of this study was to investigate the frequency with which interatrial shunts are found during routine coronary computed tomography (CT) angiography and to describe imaging characterizations of patent foramen ovale (PFO), atrial septal defect (ASD), and atrial septal aneurysm (ASA).

Materials and methods

A total of 1081 adult patients were evaluated retrospectively for interatrial shunting; 77 were excluded from the study. CT diagnosis of PFO was defined as (1) a channel-like appearance of the interatrial septum (IAS) and (2) a contrast agent jet flow from the left atrium (LA) to the right atrium (RA). ASD was defined as (1) the IAS resembling a membrane with a hole and (2) a contrast jet flow between the two atria. ASA was identified by detecting a minimum 10-mm protrusion of the LA beyond the IAS into the RA.

Results

Among 1004 patients, 86 patients (8.6%) were diagnosed to have PFO. Another 23 patients (2.3%) had a hole in the IAS and were diagnosed as having ASD: 21 with an ostium secundum-type ASD and 2 with the sinus venosus type. ASA accompanied ASD in three patients.

Conclusion

Electrocardiography-gated CT using the saline-chaser contrast injection technique that is routinely used for coronary arterial imaging can be used to detect interatrial shunts. The technique can also serve as a method for differentiating PFO, ASD, and ASA.

Key words

Foramen ovale, patent Heart septal defects, atrial Tomography, spiral computed Angiography coronary CT 

Copyright information

© Japan Radiological Society 2011

Authors and Affiliations

  • Dilek Kosehan
    • 1
  • Kayihan Akin
    • 1
  • Asli Koktener
    • 1
  • Banu Cakir
    • 1
  • Ayse Aktas
    • 1
  • Mehmet Teksam
    • 1
  1. 1.Department of RadiologyFatih University School of MedicineEmek, AnkaraTurkey

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