Discordance of dual-isotope (hybrid) myocardial perfusion imaging results in patients who have undergone revascularization procedures.
Three hundred twenty-one separate acquisition dual-isotope myocardial perfusion scans were reviewed retrospectively. Studies performed in six patients demonstrated a relative improvement in Tc-99m sestamibi uptake during stress in segments that appeared abnormal on rest injected Tl-201 images. All patients who demonstrated this pattern had a prior history of myocardial infarction and interventional revascularization. While many factors may contribute to this appearance, the authors favor the presence of a patent infarct-related artery as being the most significant.
Connolly
L P
LP
Department of Radiology, New England Deaconess Hospital, Boston, MA 02215.
Hill
T C
TC
Cohen
M C
MC
Burger
A J
AJ
D015906:Angioplasty, Balloon, Coronary; D001026:Coronary Artery Bypass; D003327:Coronary Disease / Q000000981:diagnostic imaging*; D004176:Dipyridamole; D005080:Exercise Test; D005260:Female; D006321:Heart / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D009203:Myocardial Infarction / Q000628:therapy; D012189:Retrospective Studies; D017256:Technetium Tc 99m Sestamibi; D013794:Thallium Radioisotopes; D015899:Tomography, Emission-Computed, Single-Photon
D013794:Thallium Radioisotopes; D004176:Dipyridamole; D017256:Technetium Tc 99m Sestamibi