Results 261 to 270 of about 78,355 (309)
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Preconditioning stimuli and inadvertent preconditioning
Journal of Molecular and Cellular Cardiology, 1995There are several factors besides brief episodes of total coronary occlusion which can provide sufficient stress to result in a preconditioning-like effect on the size of a myocardial infarction. Partial coronary artery stenosis, hypoxia, stretch, catecholamines, rapid pacing, and certain pharmacologic therapies may provide preconditioning stimuli ...
R A, Kloner +3 more
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Current Opinion in Cardiology, 1997
It has been shown that repeated brief coronary occlusions increase myocardial resistance towards prolonged episodes of ischemia. This phenomenon, which renders the heart more tolerant to ischemia with subsequent limitation of infarct size, has been termed ischemic preconditioning and has been described in a variety of species.
E R, Schwarz, W S, Whyte, R A, Kloner
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It has been shown that repeated brief coronary occlusions increase myocardial resistance towards prolonged episodes of ischemia. This phenomenon, which renders the heart more tolerant to ischemia with subsequent limitation of infarct size, has been termed ischemic preconditioning and has been described in a variety of species.
E R, Schwarz, W S, Whyte, R A, Kloner
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Heart Failure Reviews, 2007
Brief ischemia to the myocardium initiates a cascade of biochemical events in cardiac myocytes that protects the heart muscle during subsequent ischemic insults. This phenomenon is called ischemic preconditioning. If an acute myocardial infarction is preceded by preinfarction angina, it results in smaller infarction size, fewer cardiac arrhythmias, and
Shereif H, Rezkalla, Robert A, Kloner
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Brief ischemia to the myocardium initiates a cascade of biochemical events in cardiac myocytes that protects the heart muscle during subsequent ischemic insults. This phenomenon is called ischemic preconditioning. If an acute myocardial infarction is preceded by preinfarction angina, it results in smaller infarction size, fewer cardiac arrhythmias, and
Shereif H, Rezkalla, Robert A, Kloner
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Profitability of preconditioning
American Association of Bovine Practitioners Conference Proceedings, 2010Preconditioning (PC) generally refers to methods used to adequately prepare a calf for a successful feedlot experience. The details of various preconditioning programs have been annotated elsewhere. In all programs, calves are vaccinated for viral respiratory diseases and seven to eight clostridial organisms; dewormed; treated for lice and grubs; bulls
Hilton, W. Mark, Olynk, Nicole J.
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Management of Preconditioned Calves and Impacts of Preconditioning
Veterinary Clinics of North America: Food Animal Practice, 2015When studying the practice of preconditioning (PC) calves, many factors need to be examined to determine if cow-calf producers should make this investment. Factors such as average daily gain, feed efficiency, available labor, length of the PC period, genetics, and marketing options must be analyzed.
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Preconditioning Myocardium with Ischemia
Cardiovascular Drugs and Therapy, 1991Preconditioning and stunning are the chief adaptive changes induced in myocardium by a brief episode of reversible ischemia followed by arterial reperfusion. In the dog heart, both coexist for a period of at least 20 minutes of reperfusion, but after 120 minutes of reflow, preconditioning is much diminished, while stunning remains fully developed ...
R B, Jennings, C E, Murry, K A, Reimer
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Support Theory for Preconditioning
SIAM Journal on Matrix Analysis and Applications, 2003Summary: We present the support theory, a set of techniques for bounding extreme eigenvalues and condition numbers for matrix pencils. Our intended application of support theory is to enable proving condition number bounds for preconditioners for symmetric, positive definite systems. One key feature sets our approach apart from most other works: We use
Erik G. Boman, Bruce Hendrickson
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Preconditioning Reduced Matrices
SIAM Journal on Matrix Analysis and Applications, 1996The authors are interested in solving linear systems of the form \(Z^T GZp= d\). Systems of this form are obtained from the constraint minimization problem \[ \text{minimize}_x\;f(x)= \textstyle{{1\over 2}} x^T Gx- c^T x\quad\text{subject to } Ax= b. \] Here \(Z\) is a matrix whose columns form a basis for the kernel of \(A\).
Stephen G. Nash, Ariela Sofer
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Preconditioning —a reappraisal of protection
Basic Research in Cardiology, 1996Preconditioning has been described as the most potent form of protection against myocardial necrosis yet described (5). The protection conferred by preconditioning has been found against most of the deleterious effects induced by ischaemia and reperfusion, and in most animal models as well as in humans.
L M, King, L H, Opie
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Ischemic Preconditioning of the Kidney
Bulletin of Experimental Biology and Medicine, 2021The phenomenon of ischemic preconditioning was discovered in 1986 in experiments with the heart, and then it was observed in almost all organs, the kidneys included. This phenomenon is underlain by conditioning of the tissues with short ischemia/reperfusion cycles intended for subsequent exposure to pathological ischemia.
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