Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0022116 (ischemia)
 91,303 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

We report a case of adult polymyositis with peculiar muscular pathology of innumerable muscle fiber necrosis and regeneration accentuated in the perifascicular area. A 51-year-old woman developed generalized weakness of the extremities, trunk and bulbar muscles subacutely for two months. Anterior tibial muscle biopsy showed numerous tube-like necrotic/regenerative muscle fibers predominantly in the perifascicular area. The diameters of the muscle fibers were smaller in the periphery of the fascicles. Small arteries at the center of the fascicles occasionally showed marked perivascular cuffing, although complement component C9 was negative in the vessel wall. The gradient of the diameters of necrosis/regeneration fibers was thought to have been caused by ischemia of the muscles, which persisted at the perifascicular area leading to recurrent necrosis and regeneration and gradually invaded towards the center of the fascicles. We designated this muscular pathology as perifascicular necrosis and regeneration, and regarded it was an acute severe form of the perifascicular ischemic lesions of myositis.
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PMID:[Perifascicular necrosis and regeneration in a case of adult polymyositis]. 191 31

The primary objective of this study was to investigate if detection of apoptosis in the heart can be used to diagnose early myocardial ischaemia. The material consisted of myocardial tissue from autopsy cases: 10 cases with occlusive, thrombotic coronary artery disease and acute myocardial infarction, 10 cases of sudden cardiac death without coronary artery disease (CAD) and 8 controls without cardiovascular disease and with known causes of death. Necrotic changes in the myocardium were detected with hematoxylin-erythrosin-saffron, Mallory's PTAH stain and with antibodies against complement 9. Apoptotic nuclei were visualised with two different kits using the terminal deoxynucleotidyl transferase-mediated desoxyuridinetriphosphate nick end-labeling (TUNEL) method on histological sections. In the patients with CAD, early myocardial infarction was found in one defined area of the ventricular wall; apoptotic myocyte nuclei were observed not in the necrotic lesions, but evenly spread usually without a gradient, all over the myocardium with a mean number per high power field of 29% (range 3-56%) of the total number of myocyte nuclei. In the sudden cardiac deaths without CAD, necrosis was scarce and distributed both focally and irregularly in both the left and right ventricular walls. With few exceptions, the percentage of apoptotic myocyte nuclei exceeded 20% in all sections (mean 24%, range 0-68%). No difference was seen between patients with CAD and those without CAD (p > 0.05). With the TUNEL method, positively stained nuclei were seen very early and extensively all over the myocardium. It is not certain that they represent true apoptosis induced by ischemia, but TUNEL appears to be a useful screening method in cases where sudden cardiac death is suspected.
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PMID:TUNEL: a useful screening method in sudden cardiac death. 1192 3