Abstract：
:Extracellular potassium activity before and after coronary occlusion was measured in the canine heart by means of potassium-selective surface electrodes. In the ischaemic myocardium potassium activity rapidly increased from a preocclusion value of 3.2 +/- 0.3 mmol.litre-1 to 10 +/- 0.6 mmol.litre-1 within the first 5 min and to about 11.3 +/- 0.5 mmol.litre-1 after 10 min of ischaemia (range from 9.5 to 14.5 mmol.litre-1). Following the initial 10 min of ischaemia no further increase was measured. In the non-ischaemic area potassium activity remained constant. Acute beta-blockade significantly attenuated the initial rate of increase in potassium activity; however, beta-blockade did not influence maximal values of extracellular potassium activity measured after occlusion. Lowering of heart rate by vagal stimulation did not modify the pattern of increase in potassium during acute ischaemia. Following ventricular fibrillation, a slow but continuous rise in potassium activity was found. These results demonstrate that extracellular potassium activity in the acutely ischaemic myocardium is considerably higher than indicated by the technique of coronary vein sampling and is in the range necessary for the development of re-entrant arrhythmias in the early phase after coronary occlusion.
journal_name
Cardiovasc Resjournal_title
Cardiovascular researchauthors
Wiegand V,Güggi M,Meesmann W,Kessler M,Greitschus Fdoi
10.1093/cvr/13.5.297subject
Has Abstractpub_date
1979-05-01 00:00:00pages
297-302issue
5eissn
0008-6363issn
1755-3245journal_volume
13pub_type
杂志文章abstract：:Computation of indices of regional myocardial contractility such as the shortening, or the work done by or on a segment of myocardium in a single cardial cycle is tedious to perform manually, and complex interfacing and software is needed for digital computation. We describe the principles of an on-line, analogue devi...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/17.12.767
更新日期：1983-12-01 00:00:00
abstract：AIMS:To determine the role of gap junctions (GJs) in hypoxic pulmonary vasoconstriction (HPV). METHODS AND RESULTS:Studies were performed in rat isolated intrapulmonary arteries (IPAs) mounted on a myograph and in anaesthetized rats. Hypoxia induced a biphasic HPV response in IPAs preconstricted with prostaglandin F2α...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/cvt129
更新日期：2013-08-01 00:00:00
abstract：:Although fully explored in larger animals, the role of injection site and sample microsphere content on variability of coronary blood flow (CBF) measurement using the microsphere technique remains controversial in rats despite the fact that this species is extensively used in cardiovascular research. We therefore inve...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/23.5.443
更新日期：1989-05-01 00:00:00
abstract：OBJECTIVE:After-depolarization associated arrhythmias are frequently observed in heart failure and associated with spontaneous calcium release from sarcoplasmic reticulum (SR), calcium after-transients. We hypothesize that disturbed SR calcium handling underlies calcium after-transients in heart failure (HF). METHODS:...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/s0008-6363(02)00854-4
更新日期：2003-04-01 00:00:00
abstract：:Changes in left ventricular internal diameter resulting from increasing intrapericardial pressure induced by increasing the pericardial fluid volume were studied in closed chest, anaesthetized dogs. Left ventricular internal diameters were measured by placing an ultrasonic dimension catheter in the left ventricle at t...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/9.6.707
更新日期：1975-11-01 00:00:00
abstract：OBJECTIVE:Evidence suggests important relationships among chronic inflammatory processes, endothelial dysfunction, hypertension and target organ damage. The present study examined the effects of chronic treatment with an anti-inflammatory p38 mitogen-activated protein kinase (MAPK) inhibitor (SB-239063AN) in the N(omeg...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/j.cardiores.2004.12.021
更新日期：2005-04-01 00:00:00
abstract：:Rupture of vulnerable atherosclerotic plaques leading to an atherothrombotic event is the primary driver of myocardial infarction and stroke. The ability to detect non-invasively the presence and evolution of vulnerable plaques could have a huge impact on the future identification and management of atherosclerotic car...
journal_title：Cardiovascular research
pub_type： 杂志文章,评审
doi：10.1093/cvr/cvz162
更新日期：2019-12-01 00:00:00
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journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/cvu264
更新日期：2015-03-01 00:00:00
abstract：AIMS:Placental growth factor (PlGF), a homologue of vascular endothelial growth factor, is a pleiotropic cytokine with a pro-inflammatory activity. Previous gene-inactivation studies revealed that the loss of PlGF delays atherosclerotic lesion development and inhibits macrophage infiltration, but the activity of an ant...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/cvp380
更新日期：2010-04-01 00:00:00
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journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/s0008-6363(03)00457-7
更新日期：2003-09-01 00:00:00
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journal_title：Cardiovascular research
pub_type： 杂志文章,评审
doi：10.1093/cvr/cvx133
更新日期：2017-09-01 00:00:00
abstract：OBJECTIVE:Left ventricular assist devices (LVAD) have been used to 'bridge' patients with end-stage heart failure to transplantation. Although several reports have suggested that the native ventricular function recovers after long-term LVAD support, a process called 'reverse remodeling', the underlying biological mecha...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/s0008-6363(01)00433-3
更新日期：2002-01-01 00:00:00
abstract：OBJECTIVES:Injury stimulates smooth muscle cell (SMC) migration and proliferation by mechanisms that are incompletely understood. Surgical preparative injury is an important determinant of neointimal thickening in human saphenous vein bypass grafts. We investigate here whether basement-membrane-degrading metalloprotein...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/s0008-6363(96)00211-8
更新日期：1997-02-01 00:00:00
abstract：OBJECTIVE:Temporal effects of prolonged hypoxaemia and reoxygenation, on the systemic pulmonary and mesenteric circulations in newborn piglets, were investigated. METHODS:Two groups [control (n = 5), hypoxaemic (n = 7)] of 1-3 day old anaesthetised piglets were instrumented with ultrasound flow probes placed to measur...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/s0008-6363(98)00080-7
更新日期：1998-08-01 00:00:00
abstract：OBJECTIVE:Inhibitors of poly (ADP-ribose) synthetase (PARS) activity reduce the infarct size caused by regional myocardial ischaemia and reperfusion in the rabbit and rat in vivo. The mechanism of action of these inhibitors is unclear. Here we investigate the effects of the PARS inhibitor 3-aminobenzamide (3-AB) on inf...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/s0008-6363(98)00221-1
更新日期：1999-01-01 00:00:00
abstract：OBJECTIVE:The type 1 fibroblast growth factor receptor (FGFR-1) is the only high affinity receptor for fibroblast growth factor-2 (FGF-2) in the rat myocardium, and is essential for normal growth and development of the heart. Levels of FGFR-1 are developmentally regulated, being high in embryonic cardiac myocytes. Also...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/s0008-6363(99)00008-5
更新日期：1999-06-01 00:00:00
abstract：:Cholesterol is an essential component of both the peripheral nervous system and central nervous system (CNS) of mammals. Brain cholesterol is synthesized in situ by astrocytes and oligodendrocytes and is almost completely isolated from other pools of cholesterol in the body, but a small fraction can be taken up from t...
journal_title：Cardiovascular research
pub_type： 杂志文章,评审
doi：10.1093/cvr/cvu148
更新日期：2014-08-01 00:00:00
abstract：OBJECTIVE:To determine the role of calcineurin and Src tyrosine kinase in the regulation of inducible nitric oxide synthase (iNOS) expression and protection in cardiomyocytes. METHODS:iNOS expression was studied in isolated neonatal rat ventricular myocyte cultures in response to bacterial lipopolysaccharide (LPS) or ...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/j.cardiores.2006.05.026
更新日期：2006-09-01 00:00:00
abstract：OBJECTIVES:Cardiovascular disease is rare in premenopausal women, but increases after the menopause when hormone replacement therapy reduces coronary events. Vascular smooth muscle cell (SMC) proliferation and migration occur in atherosclerosis, restenosis and venous graft disease. We studied the effects of 17 beta-est...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：
更新日期：1996-11-01 00:00:00
abstract：:The hypothalamic-pituitary-adrenal (HPA) axis, like the sympathetic nervous system and the renin-angiotensin-aldosterone (RAA) system, sustains life in stressful situations by increasing vascular tone and ensuring fuel availability. It also modulates inflammation and tissue repair processes. Untoward cardiovascular ef...
journal_title：Cardiovascular research
pub_type： 杂志文章,评审
doi：10.1016/j.cardiores.2004.07.006
更新日期：2004-11-01 00:00:00
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journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/28.12.1780
更新日期：1994-12-01 00:00:00
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journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/s0008-6363(00)00210-8
更新日期：2001-01-01 00:00:00
abstract：:Cardiac accumulation patterns of pyrophosphate labelled with techetium-99m (TcPyP) in rats one hour to 7 days after coronary artery ligation were studied by light microscopy, myocardial scintigraphy, imaging the isolated heart and by direct measurement of tissue activity. Results suggest that myocardial cells taking u...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/14.6.352
更新日期：1980-06-01 00:00:00
abstract：OBJECTIVE:Chlamydia pneumoniae infection has been associated with atherosclerosis, although the mechanisms by which C. pneumoniae contribute to atherogenesis remain unclear. Altered production of nitric oxide, a known bactericidal and anti-inflammatory agent, represents one possible mechanistic link. To examine this is...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/s0008-6363(03)00389-4
更新日期：2003-10-15 00:00:00
abstract：STUDY OBJECTIVE:The aim was to investigate the effects of long-term treatment with an alpha 1 blocker, bunazosin hydrochloride, on blood pressure, heart weight, myocardial contractility, and ventricular myosin isoenzyme pattern in spontaneously hypertensive rats (SHR). DESIGN:Bunazosin hydrochloride was given orally i...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/25.7.565
更新日期：1991-07-01 00:00:00
abstract：:Ventricular function curves relating stroke work and left ventricular end-diastolic pressure were generated in awake dogs during increases in preload produced by infusion of fluid and during increases in afterload produced by administration of phenylephrine. The ventricular function curves produced by preloading were ...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/13.7.392
更新日期：1979-07-01 00:00:00
abstract：OBJECTIVES:Responses to EDHF are usually characterised in the presence of nitric oxide synthase (NOS) and cyclooxygenase (COX) inhibitors. The contribution of NO to endothelium-dependent relaxation in the presence of NOS inhibitors was assessed using NO scavengers with the objective of testing (i) whether any residual ...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/s0008-6363(02)00611-9
更新日期：2003-01-01 00:00:00
abstract：OBJECTIVE:In diabetes mellitus several cardiac electrophysiological parameters are known to be affected. In rodent experimental diabetes models changes in these parameters were reported, but no such data are available in other mammalian species including the dog. The present study was designed to analyse the effects of...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/j.cardiores.2006.11.010
更新日期：2007-02-01 00:00:00
abstract：:Zero drift may be a cause of imprecision when micromanometer tipped catheters are used for intravascular pressure measurement over long periods of time. Drift of only a few mm Hg may represent a significant error when accurate recording of low vascular pressures is required. To overcome this problem a micromanometer t...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/23.2.152
更新日期：1989-02-01 00:00:00
abstract：BACKGROUND:Plasma low density lipoproteins (LDL) play a key role in the pathogenesis of atherosclerosis. LDL modify gene expression in vascular cells leading to disturbances in the functional state of the vessel wall. METHODS:Expression levels of C-4 sterol methyl oxidase gene (ERG25), sterol regulatory element bindin...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/s0008-6363(02)00856-8
更新日期：2003-04-01 00:00:00
