Applicability of ECG-gated multislice helical CT to patients with atrial fibrillation

Takahisa Sato, Hirofumi Anno, Takeshi Kondo, Hiroto Harigaya, Kaori Inoue, Satoshi Kakizawa, Keita Ohshima, Masayoshi Sarai, Hitoshi Hishida, Kazuhiro Katada, Masatoshi Kanou

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5 Citations (Scopus)


Background: Multislice computed tomography coronary angiography (CTCA) is reconstructed by ECG gating and consequently it is difficult to obtain coronary artery images from patients with arrhythmias, such as atrial fibrillation (AF), by the conventional method. Methods and Results: Eleven patients with AF (9 males, 2 females; mean age: 62.5 years) underwent CTCA using a slice thickness of 0.5 mm, gantry rotation of 0.4 or 0.5 s/rot and pitch of 3.2-4.0. A segmented reconstruction method was used to construct CTCA images at the conventional relative 70-75% (mid-diastolic phase) and 30-35% (end-systolic phase) of the R-R interval and furthermore, the absolute mid-diastolic phase and end-systolic phase from the R wave. Three investigators, who were unaware of the coronary angiography results, independently evaluated the curved multiplanar reconstruction (MPR) images. In both the relative and absolute phase reconstruction, there were motion artifacts in the mid-diastolic than in the end-systolic phase. The absolute phase images had less motion artifacts than the conventional relative phase images. Optimal curved MPR images were obtained in the absolute end-systolic phase. The quality and motion artifacts of those optimal images from AF patients were similar to those from patients in sinus rhythm. Conclusion: The absolute end-systolic phase is the best time to get optimal CTCA images in AF patients.

Original languageEnglish
Pages (from-to)1068-1073
Number of pages6
JournalCirculation Journal
Issue number9
Publication statusPublished - 09-2005

All Science Journal Classification (ASJC) codes

  • Cardiology and Cardiovascular Medicine


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