Differences in Thallium-201 uptake in reperfused and nonreperfused myocardial infarction

Journal Article · Thu Sep 01 04:00:00 EDT 1983 · Circ. Res.; (United States)

DOI:https://doi.org/10.1161/01.RES.53.3.414· OSTI ID:5428841

Melin, J A; Becker, L C; Bulkley, B H

The respective importance of flow and cellular viability in determining initial myocardial thallium uptake was studied in reperfused and nonreperfused experimental myocardial infarction. Open-chest dogs were subjected to permanent coronary artery occlusion of 70-minute (n . 3) or 5-hour duration (n . 5), or to a 3-hour temporary occlusion followed by reflow (n . 14). Thallium uptake 10 minutes after intravenous injection was compared directly with radioactive microspheres in myocardial samples from excised hearts. Triphenyl tetrazolium chloride staining was used to differentiate necrotic and viable samples with confirmation by electron microscopy. In nonreperfused infarcts, thallium uptake occurred despite necrosis, and a close correlation was found between thallium uptake and regional myocardial blood flow. In reperfused infarcts, thallium uptake again occurred, but was reduced relative to flow in necrotic myocardium and, to a lesser extent, in reperfused viable areas. However, because of the high levels of reflow, actual thallium uptake was often more than 50% of normal in reperfused necrotic regions. This study demonstrates that the presence of thallium uptake is an unreliable indicator of myocardial injury and that reperfused necrotic tissue may have remarkably high levels of thallium uptake.

• Research Organization: Cardiology Division, Johns Hopkins University School of Medicine, Baltimore, Maryland
• OSTI ID: 5428841
• Journal Information: Circ. Res.; (United States), Journal Name: Circ. Res.; (United States) Vol. 53:3; ISSN CIRUA
• Country of Publication: United States
• Language: English

Related Subjects

550601* -- Medicine-- Unsealed Radionuclides in Diagnostics
62 RADIOLOGY AND NUCLEAR MEDICINE
ANIMALS
BETA DECAY RADIOISOTOPES
BLOOD FLOW
BODY
CARDIOVASCULAR DISEASES
CARDIOVASCULAR SYSTEM
DAYS LIVING RADIOISOTOPES
DIAGNOSIS
DISEASES
DOGS
ELECTRON CAPTURE RADIOISOTOPES
ELECTRON MICROSCOPY
EVALUATION
HEART
HEAVY NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MAMMALS
MICROSCOPY
MICROSPHERES
MUSCLES
MYOCARDIAL INFARCTION
MYOCARDIUM
NUCLEI
ODD-EVEN NUCLEI
ORGANS
PERFUSED ORGANS
RADIOISOTOPES
RADIONUCLIDE KINETICS
SECONDS LIVING RADIOISOTOPES
THALLIUM 201
THALLIUM ISOTOPES
UPTAKE
VERTEBRATES