title: Thallium-201 is comparable to technetium-99m-sestamibi for estimating cardiac function in patients with abnormal myocardial perfusion imaging.
abstract: We analyzed the left-ventricular functional data obtained by cardiac-gated single-photon emission computed tomography myocardial perfusion imaging (MPI) with thallium-201 (Tl-201) and technetium-99m-sestamibi (MIBI) protocols in different groups of patients, and compared the data between Tl-201 and MIBI. Two hundred and seventy-two patients undergoing dipyridamole stress/redistribution Tl-201 MPI and 563 patients undergoing 1-day rest/dipyridamole stress MIBI MPI were included. Higher mean stress ejection fraction (EF), rest EF, and change in EF (ΔEF) were noticed in the normal MPI groups by both Tl-201 and MIBI protocols. Higher mean EF was observed in the females with normal MPI results despite their higher mean age. Comparisons between the Tl-201 and MIBI groups suggested a significant difference in all functional parameters, except for the rest end diastolic volume/end systolic volume and ΔEF between groups with negative MPI results. For the positive MPI groups, there was no significant difference in all parameters, except for the change in end diastolic volume and change in end systolic volume after stress between both protocols. The Tl-201 provides comparable left-ventricular functional data to MIBI cardiac-gated single-photon emission computed tomography in patients with positive MPI results, and may therefore be undertaken routinely for incremental functional information that is especially valuable to this patient group.
authors.affiliation: Department of Nuclear Medicine, Mackay Memorial Hospital, Taipei, Taiwan; Mackay Junior College of Medicine, Nursing, and Management, Taipei, Taiwan.
authors.forename: Ming-Che
authors.initials: MC
authors.lastname: Wu
authors.affiliation: Department of Cardiology, Mackay Memorial Hospital, Taipei, Taiwan.
authors.forename: Cheng-Ting
authors.initials: CT
authors.lastname: Tsai
authors.affiliation: Department of Cardiology, Mackay Memorial Hospital, Taipei, Taiwan.
authors.forename: Hui-Chun
authors.initials: HC
authors.lastname: Lin
authors.affiliation: Department of Medical Research, Mackay Memorial Hospital, Taipei, Taiwan.
authors.forename: Fang-Ju
authors.initials: FJ
authors.lastname: Sun
authors.affiliation: Department of Nuclear Medicine, Mackay Memorial Hospital, Taipei, Taiwan. Electronic address: b8401046@gmail.com.
authors.forename: Ku-Hung
authors.initials: KH
authors.lastname: Lin
mesh_terms: D005260:Female; D006321:Heart / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D055414:Myocardial Perfusion Imaging; D017256:Technetium Tc 99m Sestamibi / Q000737:chemistry*; D013794:Thallium Radioisotopes / Q000737:chemistry*
chemical_list: D013794:Thallium Radioisotopes; D017256:Technetium Tc 99m Sestamibi
keywords: Ejection fraction; Myocardial perfusion; Tc-99m-sestamibi; Thallium chloride