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vascular ring/hypoxia
Ο σύνδεσμος αποθηκεύεται στο πρόχειρο
Σελίδα 1 από 34 Αποτελέσματα
Effects of long-term, high-altitude hypoxia on tension and intracellular calcium responses in coronary arteries of fetal and adult sheep.
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Σύνδεση εγγραφή
OBJECTIVE
We have previously shown that after exposure to long-term hypoxia, fetal coronary flow is maintained at control levels despite a 25% reduction in cardiac output. We also demonstrated that coronary vascular rings isolated from the long-term hypoxic fetuses and studied in well-oxygenated
[Effect of inhibition of glycolysis and myoendothelial electrical coupling on contractile responses of pulmonary artery and aorta during hypoxia in rats].
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Σύνδεση εγγραφή
The effects of blockade of glycolysis on the contractile activity of isolated vascular rings of both the pulmonary artery and, the thoracic aorta were studied under hypoxia in intact, denuded vessels and those with blocked myoendothelial electrical coupling. The blockade of glycolysis led to a
Relationship between chronic hypoxia and in vitro pulmonary relaxation mediated by endothelium-derived relaxing factors in human chronic obstructive lung disease.
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Σύνδεση εγγραφή
Endothelium-derived relaxing factors (EDRF) are paracrine vasodilator substances released by endothelial cells. There is compelling evidence to suggest that EDRF may play an important role in the modulation of vascular tone in the systemic circulation. However, the role of EDRF-mediated pulmonary
Coronary vasomotor disorders during hypoxia-reoxygenation: do calcium channel blockers play a protective role?
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Σύνδεση εγγραφή
During heart surgery, myocardial dysfunction may occasionally appear when extracorporeal circulation is discontinued, causing serious haemodynamic disorders. Many mechanisms are involved in this hypoxia-reoxygenation syndrome. The aim of this experimental study was to characterize the vasomotor
[Contraction responses of isolated aortic rings of pika (Ochotona curzoniae) and Sprague-Dawley rat to hypoxia].
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Σύνδεση εγγραφή
The aim of the present study was to observe the effects of hypoxia on tensions of aortic rings of pika (Ochotona curzoniae) and Sprague-Dawley (SD) rat. The aortic rings were prepared, and in vitro vascular ring perfusion was used to assay the effects of hypoxia or different drugs on contraction
Endothelium-dependent relaxation and cyclic GMP accumulation in rabbit pulmonary artery are selectively impaired by moderate hypoxia.
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Σύνδεση εγγραφή
The effect of hypoxia on endothelium-dependent and endothelium-independent vasodilation was studied in phenylephrine-precontracted, isolated rings of rabbit first-branch pulmonary artery. Concentration-dependent relaxation responses to the endothelium-dependent dilators methacholine, ATP, and the
Mechanisms of relaxation of coronary artery by hypoxia.
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Σύνδεση εγγραφή
This study was designed to clarify the dependency of hypoxic coronary vasodilation (HCD) on the endothelium and the role of the K+ channels on HCD in the rabbit coronary artery. HCD was investigated in an isolated left circumflex coronary artery precontracted with prostaglandin F2 alpha. Vascular
Slow channel calcium blockers attenuate reoxygenation-mediated vascular contraction, but augment anoxia-mediated vascular contraction.
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Σύνδεση εγγραφή
Anoxia and reoxygenation modulate vasomotor tone. To determine the effect of the slow channel calcium blockers verapamil and diltiazem in vascular smooth muscle contraction during states of altered oxygenation, rat aortic rings with intact endothelium were contracted with norepinephrine (NE) or the
Hypoxia-elicited contraction of aorta and coronary artery via removal of endothelium-derived nitric oxide.
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Σύνδεση εγγραφή
To characterize endothelium-derived contracting factor 1 (EDCF1) released under hypoxia, vascular rings isolated from spontaneously hypertensive rat (SHR) aorta and canine coronary artery were suspended for isometric tension recording in an organ chamber filled with a Krebs-Henseleit buffer. In SHR
Endothelium-derived nitric oxide-dependent response to hypoxia in piglet intrapulmonary arteries.
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Σύνδεση εγγραφή
The purpose of this study was to determine the involvement of eicosanoids and nitric oxide (NO) in the response to hypoxia in isolated intrapulmonary (third branch) arteries from 10- to 17-day-old piglets. We also compared the response to hypoxia in pulmonary arteries to pulmonary veins, mesenteric
Effects of hypoxia on pulmonary vascular contractility.
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Σύνδεση εγγραφή
Although hypoxic pulmonary vasoconstriction (HPV) has been recognized by many researchers, the precise mechanism remains unknown. As isolated pulmonary arteries will constrict in vitro in the response to hypoxia, the oxygen sensor/transduction mechanism must reside in the pulmonary arterial smooth
CO modulates pulmonary vascular response to acute hypoxia: relation to endothelin.
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Σύνδεση εγγραφή
Pulmonary intralobar arteries express heme oxygenase (HO)-1 and -2 and release carbon monoxide (CO) during incubation in Krebs buffer. Acute hypoxia elicits isometric tension development (0.77 +/- 0.06 mN/mm) in pulmonary vascular rings treated with 15 micromol/l chromium mesoporphyrin (CrMP), an
Differential effects of catecholamines on vascular rings from ductus venosus and intrahepatic veins of fetal sheep.
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Σύνδεση εγγραφή
Ductus venosus (DV) sparing means the maintenance of blood flow through the DV following reduction of liver venous blood supply during fetal hypoxia. The present study compared the reactions of the isthmic portion of the DV and intrahepatic veins (IHVs) to catecholamines in vitro. Vessel rings of 1
Wheezing child.
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Σύνδεση εγγραφή
This case discussion is part of the Integrating Basic Science into Clinical Teaching Initiative. It is intended to examine wheezing as a symptom and to describe the underlying physiology that explains the physical findings and blood gas features in an attempt to localize the site of obstruction. The
[Fibroscopic bronchoscopy in intensive care].
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Σύνδεση εγγραφή
The field of application for fibreoptic bronchoscopy (FB) in the intensive care unit has been extended since the generalised introduction of fibroscopes of 4.9 mm in diameter (previously called paediatric fibroscopes). Paediatric and neonatal intensive care units have benefited from the availability
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