Myocardial thallium-201 kinetics in normal and ischemic myocardium.
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چکیده
منابع مشابه
Myocardial thallium-201 kinetics in normal and ischemic myocardium.
The initial myocardial uptake of thallium-201 depends on myocardial blood flow distribution. The phenomenon of delayed thallium redistribution after transiently or chronically altered myocardial perfusion has been described. The net myocardial accumulation of thallium-201 after injection depends upon the net balance between continuing myocardial extraction from low levels of recirculating thall...
متن کاملThallium-201 kinetics in nonischemic canine myocardium.
Myocardial thallium-201 (20TI) kinetics have not been precisely defined because reliable techniques to determine continuous activity in vivo have not been available. In this study, an implantable miniature cadmium telluride radiation detection device was inserted through the left ventricular apex, positioned against the endocardium, and used for continuous on-line monitoring of myocardial 201TI...
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The purpose of the present study was to define myocardial and blood thallium-201 (Tl-201) kinetics after infusion of dipyridamole in normal canine myocardium and in myocardium distal to a coronary artery stenosis. Miniature radiation detector probes were implanted in the left ventricle in 39 open-chest dogs. A balloon constrictor was placed around the proximal left circumflex coronary artery. E...
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Infusion of dipyridamole has been suggested as an alternative to exercise stress for myocardial perfusion imaging for detection of ischemia, but the mechanism and significance of thallium-201 (201Tl) redistribution after administration of dipyridamole are uncertain. If disparate intrinsic cellular efflux rates of 201Tl from normal and relatively underperfused myocardium in response to dipyridam...
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Dr. Pohost is an Established Investigator of the American Heart Association. Address reprint requests to Dr. Okada, Massachusetts General Hospital. Received for publication 6 May 1981 and in revised form 24 July 1981. tially zero). Blood TI-201 activity decayed triexponentially with a final blood X3 = 0.0018±0.0001 min-1, which was almost identical to the final myocardial X2 decay constant. Thu...
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ژورنال
عنوان ژورنال: Circulation
سال: 1981
ISSN: 0009-7322,1524-4539
DOI: 10.1161/01.cir.64.3.610