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Reduced artifacts and improved diagnostic value of 640-slice computed tomography in patients with cardiac pacemakers

Guoquan Cao1, Weijian Chen1, Kehua Pan1

  • 11 Department of Radiology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China.

The Journal of International Medical Research
|February 28, 2019
PubMed

Insights

640-slice computed tomography (CT) is more effective than 64-slice CT for diagnosing coronary artery disease in pacemaker patients, significantly reducing artifacts and improving lesion detection.

Area of Science:

  • Cardiovascular Imaging
  • Medical Technology
  • Radiology

Background:

  • Pacemakers can cause artifacts in coronary computed tomography angiography (CTCA).
  • Accurate diagnosis of coronary artery disease (CAD) is challenging in pacemaker patients.

Purpose of the Study:

  • To compare the diagnostic feasibility of 640-slice CTCA versus 64-slice CTCA in patients with pacemakers.
  • To evaluate the impact of CT technology on artifact reduction and lesion detectability.

Main Methods:

  • A comparative study involving 45 patients in the 64-slice group and 50 patients in the 640-slice group.
  • All patients had pacemakers and suspected or known CAD.
  • Coronary artery segments were assessed using the American Heart Association 15-segment model.

Main Results:

  • The 640-slice CT group showed significantly lower moderate/severe artifact incidence (7.27% vs. 32.17%) and higher diagnosable rates (98.91% vs. 94.19%).
  • Artifacts were more common in patients with heart rates >65 bpm and heart arrhythmia in the 64-slice group.
  • Higher heart rates and arrhythmia were associated with increased artifact incidence in the 64-slice group.

Conclusions:

  • 640-slice CTCA demonstrates superior performance in diagnosing coronary lesions in pacemaker patients compared to 64-slice CTCA.
  • This improved efficacy is attributed to the reduction of moderate and severe artifacts.
  • 640-slice CT is particularly beneficial for patients with elevated heart rates or arrhythmias.
Abstract

Keywords:
640-slice computed tomographyCardiac pacemakercardiac imagingcomputed tomographycoronary artery diseaseimaging artifacts

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