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Updated: Jul 30, 2026

In Vivo Quantitative Assessment of Myocardial Structure, Function, Perfusion and Viability Using Cardiac Micro-computed Tomography
08:13

In Vivo Quantitative Assessment of Myocardial Structure, Function, Perfusion and Viability Using Cardiac Micro-computed Tomography

Published on: February 16, 2016

Thallium-201 myocardial SPECT in left bundle branch block: diagnosis of myocardial ischemia with a disease-specific

Kristóf Zupán1, Béla Kári, Géza Fontos

  • 1Department of Cardiology, Semmelweis University, Budapest, Hungary. zkristof@freemail.hu

Journal of Nuclear Cardiology : Official Publication of the American Society of Nuclear Cardiology
|August 22, 2006
PubMed

Insights

A specialized myocardial perfusion SPECT reference file for patients with left bundle branch block (LBBB) significantly improves the detection and localization of coronary artery disease (CAD) compared to general databases.

Area of Science:

  • Cardiology
  • Nuclear Medicine
  • Medical Imaging

Background:

  • Left bundle branch block (LBBB) can complicate the interpretation of myocardial perfusion SPECT.
  • Accurate diagnosis of coronary artery disease (CAD) in LBBB patients is clinically important.

Purpose of the Study:

  • To evaluate the effectiveness of a dedicated reference file for myocardial perfusion SPECT in patients with LBBB.
  • To improve the diagnostic accuracy for CAD in this specific patient population.

Main Methods:

  • Retrospective review of Tl-201 stress-redistribution myocardial perfusion SPECT studies.
  • Development of a reference database using 18 patients with LBBB and low likelihood of CAD.
  • Comparison of diagnostic performance against a commercial system with a general database in 49 LBBB patients.

Main Results:

  • The LBBB-specific reference file significantly outperformed the general database in detecting epicardial CAD (AUC 0.835 vs 0.580, p < .01).
  • Improved localization of CAD was observed, particularly in the territories of the left anterior descending and right coronary arteries.

Conclusions:

  • A dedicated reference file for LBBB patients enhances the detection and localization of myocardial ischemia on Tl-201 SPECT.
  • This specialized approach improves diagnostic accuracy for CAD in patients with LBBB.
Abstract

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