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

Background: The aim of this study was to assess the value of a myocardial perfusion single photon emission computed tomography (SPECT) reference file for patients with left bundle branch block (LBBB).

Methods And Results: Tl-201 stress-redistribution myocardial perfusion SPECT studies of patients with complete, permanent LBBB were reviewed retrospectively. To develop a reference database, 18 patients with a low likelihood of coronary artery disease (CAD) were selected.