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rubidium/zawał

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Positron imaging of myocardial infarction with rubidium-82.

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Positron imaging provides tomographic images of regional myocardial perfusion but has required an on-site cyclotron. Rubidium-82 (82Rb) is a short-lived (T1/2 = 75 sec) positron emitter available from a generator. In order to determine the feasibility for its use to image acute myocardial
T-wave inversion in areas of Q-wave myocardial infarction has been advocated as a predictor of myocardial viability. However, the predictive value of this electrocardiographic finding in distinguishing viable from nonviable muscle is not fully defined. Thus, we correlated electrocardiographic Q

Planar positron imaging of rubidium-82 for myocardial infarction: a comparison with thallium-201 and regional wall motion.

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Rubidium-82 (Rb-82) is a generator-produced, short half-life (76 seconds) positron emitting potassium analog. Using a mobile gamma camera equipped with a rotating tungsten collimator and high-energy shielding, we examined the use of Rb-82 in the coronary care unit and clinical laboratory for
BACKGROUND Reperfused myocardium post-acute myocardial infarction (AMI) may have altered metabolism with implications for therapy response and function recovery. We explored glucose utilization and the "reverse mismatch" (RMM) pattern (decreased F-18-fluorodeoxyglucose (FDG) uptake relative to
Potassium loss from damaged myocardial cells is linearly related to CPK enzyme loss reflecting extent of necrosis. The potassium analog, rubidium-82 (82Rb), is extracted after i.v. injection and retained in viable myocardium but is not trapped or washed out of necrotic regions. To compare myocardial

Rubidium-82 PET imaging is feasible in a rat myocardial infarction model.

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BACKGROUND Small-animal myocardial infarct models are frequently used in the assessment of new cardioprotective strategies. A validated quantification of perfusion using a non-cyclotron-dependent PET tracer would be of importance in monitoring response to therapy. We tested whether myocardial PET
BACKGROUND Although reversible perfusion defects, perfusion-metabolism mismatch and match patterns are important for differentiating viable from nonviable myocardium, the frequency of these scintigraphic patterns has not been reported. The study objective was to establish the incidence of these
BACKGROUND Determining infarct size and myocardial salvage in patients with ST-segment elevation myocardial infarction (STEMI) is important when assessing the efficacy of new reperfusion strategies. We investigated whether rest 82Rb-PET myocardial perfusion imaging can estimate area at risk, final

Acute myocardial infarction associated with intravenous dipyridamole for rubidium-82 PET imaging.

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This report describes the occurrence of chest pain and electrocardiographic features of acute myocardial infarction following intravenous dipyridamole-handgrip stress. Myocardial perfusion imaging (Rb-82 PET) demonstrated a stress-induced perfusion defect. Following failure to respond to medical

Perfusion imaging using rubidium-82 (82Rb) PET in rats with myocardial infarction: First small animal cardiac 82Rb-PET.

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Effects of phentolamine on coronary blood flow in patients with recent myocardial infarction.

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The myocardial clearance of rubidium may be obtained by praecordial counting after intravenous injection of Rb-minus 86 Cl. Eight patients with recent myocardial infarction had this determination performed before and after the infusion of 10 mg phentolamine at a rate of 0.3 mg/minute. The average

Rubidium-82 kinetics after coronary occlusion: temporal relation of net myocardial accumulation and viability in open-chested dogs.

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Serial assessment of perfusion and viability during myocardial infarction has not been feasible, in part, because of the long half-lives of available tracers. Rubidium-82 (82Rb) is a generator-produced, positron-emitting potassium analog with a short half-life (75 sec) that permits repeated studies.

[Myocardial infarction at the age under 50: influence of occupational xenobiotics (analysis of chemical elements in hair of patients)].

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X-ray and fluorescence analysis covered elemental composition of hair in 39 patients with myocardial infarction and 23 healthy individuals. The highest "chemical pollution" was seen in myocardial infarction patients whose occupations are associated with xenobiotics exposure. Hair of those patients

Noninvasive myocardial imaging with potassium-43 and rubidium-81 in patients with left bundle branch block.

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Noninvasive myocardial imaging with potassium-43 and rubidium-81 has been used successfully to identify areas of infarction and exercise-induced ischemia as regions of decreased radioactivity. The image defects observed are believed to be due to a decreased radionuclide uptake in regions of
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