Comparison of thallium redistribution with rest “reinjection” imaging for the detection of viable myocardium

To determine the incidence of incomplete redistribution on conventional delayed thallium images, 41 patients with persistent perfusion defects on myocardial images recorded 3 to 4 hours after thallium injection during exercise were studied. At the conclusion of their delayed images the patients were...

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Veröffentlicht in:The American journal of cardiology 1990-07, Vol.66 (2), p.158-163
Hauptverfasser: Rocco, Thomas P., Dilsizian, Vasken, McKusick, Kenneth A., Fischman, Alan J., Boucher, Charles A., Strauss, H.William
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container_issue 2
container_start_page 158
container_title The American journal of cardiology
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creator Rocco, Thomas P.
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Boucher, Charles A.
Strauss, H.William
description To determine the incidence of incomplete redistribution on conventional delayed thallium images, 41 patients with persistent perfusion defects on myocardial images recorded 3 to 4 hours after thallium injection during exercise were studied. At the conclusion of their delayed images the patients were reinjected at rest with approximately 1 mCi of thallium-201 and a third set of images was recorded. The images were presented at random in pairs (initial:delayed, initial:reinjection) to 2 experienced observers for qualitative scoring of 9 segments/patient. Of the 360 segments analyzed, concordance between the delayed and reinjected images occurred in 307 (85%). Of 141 segments that demonstrated a persistent perfusion abnormality on 3- to 4-hour delayed images, 44 (31%) were reassigned to a redistribution score after reinjection. In 9 patients, reinjection images provided the only evidence of ischemia from the scintigraphic data. In 13 of 14 vascular territories that demonstrated redistribution after reinjection, intact perfusion (either anterograde or via collaterals) was detected at coronary angiography. These data suggest that rest reinjection imaging may provide a means of detecting viable myocardium in segments that demonstrate a fixed perfusion abnormality on conventional 3- to 4-hour delayed thallium images.
doi_str_mv 10.1016/0002-9149(90)90580-T
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At the conclusion of their delayed images the patients were reinjected at rest with approximately 1 mCi of thallium-201 and a third set of images was recorded. The images were presented at random in pairs (initial:delayed, initial:reinjection) to 2 experienced observers for qualitative scoring of 9 segments/patient. Of the 360 segments analyzed, concordance between the delayed and reinjected images occurred in 307 (85%). Of 141 segments that demonstrated a persistent perfusion abnormality on 3- to 4-hour delayed images, 44 (31%) were reassigned to a redistribution score after reinjection. In 9 patients, reinjection images provided the only evidence of ischemia from the scintigraphic data. In 13 of 14 vascular territories that demonstrated redistribution after reinjection, intact perfusion (either anterograde or via collaterals) was detected at coronary angiography. 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subjects Adult
Aged
ANIMALS
BETA DECAY RADIOISOTOPES
Biological and medical sciences
BODY
Cardiology. Vascular system
CARDIOVASCULAR DISEASES
CARDIOVASCULAR SYSTEM
COMPARATIVE EVALUATIONS
Coronary Disease - diagnostic imaging
Coronary Disease - pathology
Coronary heart disease
COUNTING TECHNIQUES
DAYS LIVING RADIOISOTOPES
DIAGNOSIS
DIAGNOSTIC TECHNIQUES
DISEASES
DISTRIBUTION
ELECTRON CAPTURE RADIOISOTOPES
Female
HEART
Heart - diagnostic imaging
HEAVY NUCLEI
Humans
Injections, Intravenous
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
Male
MAMMALS
MAN
Medical sciences
Middle Aged
MUSCLES
MYOCARDIAL INFARCTION
Myocardial Infarction - pathology
MYOCARDIUM
Myocardium - pathology
NUCLEI
ODD-EVEN NUCLEI
ORGANS
PATIENTS
PERFUSED ORGANS
PRIMATES
RADIOISOTOPE SCANNING
RADIOISOTOPES
RADIOLOGY AND NUCLEAR MEDICINE
Radionuclide Imaging
SCINTISCANNING
SECONDS LIVING RADIOISOTOPES
THALLIUM 201
THALLIUM ISOTOPES
Thallium Radioisotopes - administration & dosage
Thallium Radioisotopes - pharmacokinetics
TISSUE DISTRIBUTION
VERTEBRATES 550601 -- Medicine-- Unsealed Radionuclides in Diagnostics
title Comparison of thallium redistribution with rest “reinjection” imaging for the detection of viable myocardium
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