Localization of radiolabeled cardiac myosin-specific antibody in myocardial infarcts. Comparison with technetium-99m stannous pyrophosphate.
Circulation
; 55(1): 74-8, 1977 Jan.
Article
en En
| MEDLINE
| ID: mdl-830221
The myocardial uptake of radioiodinated (Fab')2 fragments of antimyosin antibody [125I-(Fab')2] was compared with simultaneously administered 99mTc-pyrophosphate (Tc-PYP) in dogs undergoing coronary occlusion for 24 (N=6) or 72 hours (N=5). Relative concentrations of both agents in normal and infarcted myocardium were related to regional blood flow as determined by distribution of 55Sr-labeled microspheres in the same animals. There was an inverse exponential relationship between 125I-(Fab')2 localization and regional blood flow in 24 hr (r=-0.64) and 72 hr (r=-0.80) occluded animals. The greatest uptake of 125I-(Fab')2 was observed in subendocardial layers of the center of the infarct where regional flow was most severely impaired (1-10% of normal flow). Maximal localization of Tc-PYP was observed in subepicardial layers in samples from the periphery of the infarct where flow was only moderately reduced (31-50% of normal). Differences in distribution of these two agents in ischemic myocardium are probably related to differences in kinetics of exit from the blood pool.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Miosinas
/
Tecnecio
/
Anticuerpos
/
Infarto del Miocardio
Tipo de estudio:
Prognostic_studies
Límite:
Animals
Idioma:
En
Revista:
Circulation
Año:
1977
Tipo del documento:
Article
Pais de publicación:
Estados Unidos