Abstract：
:In isolated electrically stimulated guinea pig papillary muscles tiapamil exerts a negative inotropic action that corresponds to its presumptive inhibitory effects on the slow-channel-mediated transmembrane Ca2+ influx. However, contractile depression is always accompanied by marked alterations of the normal Na+-carried action potential. Thus Na+-dependent upstroke velocity (dV/dtmax) declines while the length of the plateau phase increases. These observations indicate that tiapamil, besides inhibiting Ca2+ inflow, also interferes with the fast inward Na+ current and possibly also reduces the repolarising K+ efflux. After partial depolarisation with a K+-rich tyrode solution (19 mmol X litre-1 K+). tiapamil lowers the Ca2+-dependent contractile force as it reduces the bioelectric parameters (upstroke velocity, amplitude, duration) of the Ca2+-mediated action potentials. Moreover, in partially depolarised myocardium, the Mg2+-induced bioelectric membrane activity is suppressed by tiapamil. Tiapamil probably operates as an agent with mixed Na+-, K+-, Ca2+- and Mg2+-antagonistic effects and, in this respect, differs considerably from the more specific Ca2+ antagonists such as verapamil, D 600 (gallopamil), nifedipine (and other 1,4-dihydropyridines) or diltiazem. However, tiapamil by virtue of its combined damping actions on both transmembrane Na+ and Ca2+ conductivities (together with prolongation of the action potential plateau), is a drug which exerts, simultaneously, the fundamental myocardial membrane effects of antiarrhythmic agents of group I, III and IV, according to the classification of Singh and Vaughan Williams. Thus these bioelectrical observations are in accordance with the results of clinical studies on tiapamil, which have demonstrated directly its antiarrhythmic efficacy.
journal_name
Cardiovasc Resjournal_title
Cardiovascular researchauthors
Späh Fdoi
10.1093/cvr/20.1.42subject
Has Abstractpub_date
1986-01-01 00:00:00pages
42-51issue
1eissn
0008-6363issn
1755-3245journal_volume
20pub_type
杂志文章abstract：:The last decade has seen a dramatic increase in the understanding of the molecular basis of arrhythmias. Much of this new information has been driven by genetic studies that focused on rare, monogenic arrhythmia syndromes that were accompanied or followed by cellular electrophysiological or biochemical studies. The ma...
journal_title：Cardiovascular research
pub_type： 杂志文章,评审
doi：10.1016/j.cardiores.2005.04.005
更新日期：2005-08-15 00:00:00
abstract：:Diabetes is one of the most prevalent chronic conditions that has a high association with death from cardiovascular disease(s). An impaired cardiac function independent of vascular disease suggests the existence of a primary myocardial defect in diabetes mellitus. We and others have documented that myocardial performa...
journal_title：Cardiovascular research
pub_type： 杂志文章,评审
doi：10.1016/s0008-6363(97)00059-x
更新日期：1997-04-01 00:00:00
abstract：OBJECTIVE:Rapid ventricular pacing reliably induces severe congestive heart failure in dogs, with an associated attenuation of baroreflex sensitivity. Unique to this model is the capacity for rapid recovery of haemodynamics and plasma noradrenaline following the cessation of pacing; however, whether baroreflex sensitiv...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/28.3.384
更新日期：1994-03-01 00:00:00
abstract：OBJECTIVE:The aim was to investigate how platelet activation during myocardial ischaemia can induce electrophysiological and arrhythmogenic effects, and examine the involvement of different platelet membrane receptors in producing these effects. METHODS:Transmembrane action potentials and electrograms were recorded fr...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/28.11.1662
更新日期：1994-11-01 00:00:00
abstract：OBJECTIVE:Jervell and Lange-Nielsen syndrome (JLNS) is a recessively inherited long QT syndrome (LQTS) characterised by profound sensorineural deafness and predisposition to syncope and sudden cardiac death. Mutation analysis has established the presence of mutations in affected individuals in the genes KCNQ1 and KCNE1...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/s0008-6363(01)00350-9
更新日期：2001-09-01 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：BACKGROUND:Peroxisome proliferator-activated receptor-gamma (PPAR-gamma) ligands have been shown to ameliorate a variety of inflammatory conditions. The present study tested the hypothesis that PPAR-gamma ligands reduce experimental autoimmune myocarditis (EAM) associated with inhibition of the expansion and activation...
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
abstract：OBJECTIVE:Decay kinetics of the voltage-gated L-type Ca(2+) current (I(CaL)) control the magnitude of Ca(2+) influx during the cardiac action potential. We investigated the influence of changes in diastolic membrane potential on I(CaL) decay kinetics in cardiac cells. METHODS:Cells were isolated enzymatically from rat...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/s0008-6363(00)00107-3
更新日期：2000-08-01 00:00:00
abstract：AIMS:In obesity, chronic low-grade inflammation and overproduction of reactive oxygen species (ROS) in fat contribute to the development of metabolic syndrome. Suppression of inflammation and ROS production in fat may attenuate the metabolic syndrome. Activation of mineralocorticoid receptor (MR) promotes inflammation ...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/cvp191
更新日期：2009-10-01 00:00:00
abstract：AIMS:Transforming growth factor-beta1 (TGF-beta1) is a multifunctional cytokine that contributes to pathogenic cardiac remodelling via mechanisms that involve oxidative stress. However, the direct impact of TGF-beta1 on contractile function of ventricular myocytes is incompletely understood. METHODS AND RESULTS:Reacti...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/cvm022
更新日期：2008-01-01 00:00:00
abstract：OBJECTIVES:We studied the effects of chronic left coronary artery ligation on cardiac structure and function in the mouse. METHODS:Morphometric studies of the left ventricle were performed in coronary artery-ligated and sham-operated animals at one, two, three and five weeks after surgery. The fraction of DNA-synthesi...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/s0008-6363(98)00216-8
更新日期：1999-03-01 00:00:00
abstract：AIMS:Atrial fibrillation (AF) is a major risk factor for cardio-embolic stroke. Anticoagulant drugs are effective in preventing AF-related stroke. However, the high frequency of anticoagulant-associated major bleeding is a major concern. This study sought to identify new targets to develop safer antithrombotic therapie...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/cvw049
更新日期：2016-06-01 00:00:00
abstract：OBJECTIVE:Determine if ischemic tolerance is reduced in the setting of experimental heart failure (HF). METHODS:Dogs were paced for 3 weeks at 240 BPM to induce heart failure which was confirmed with hemodynamic and echocardiographic measurements. The pacemaker was turned off 30 min prior to the ischemia study. Normal...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/0008-6363(96)00028-4
更新日期：1996-08-01 00:00:00
abstract：OBJECTIVE:The human ether-a-go-go-related gene (hERG) encodes the rapid component of the cardiac repolarizing delayed rectifier potassium current, I(Kr). The direct interaction of the commonly used protein kinase C (PKC) inhibitor bisindolylmaleimide I (BIM I) with hERG, KvLQT1/minK, and I(Kr) currents was investigated...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/j.cardiores.2004.07.023
更新日期：2004-12-01 00:00:00
abstract：:Angiotensin II has been implicated as an important factor in cardiac remodeling, particularly in the development of pathological left ventricular hypertrophy. It is generally assumed that angiotensin II is able to alter the phenotype of cardiac myocytes and fibroblasts, and several experiments have suggested that this...
journal_title：Cardiovascular research
pub_type： 杂志文章,评审
doi：10.1016/s0008-6363(01)00448-5
更新日期：2002-02-01 00:00:00
abstract：OBJECTIVE:Increased pulse pressure has been observed in aging subjects, but the impact on the structure and reactivity of small arteries has been scarcely evaluated. METHODS:This study presents the modifications of vascular structure and function observed in female rats of 5, 18 and 32 months of age, and their relatio...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/s0008-6363(97)00225-3
更新日期：1998-01-01 00:00:00
abstract：AIMS:Hypercholesterolaemia and myeloperoxidase (MPO) overexpression are two well-recognized risk factors for ischaemic heart disease. Peroxisome proliferator-activated receptor-gamma (PPARgamma) agonists have recently been shown to reduce ischaemic heart injury in hypercholesterolaemic animals. However, whether PPARgam...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/cvn308
更新日期：2009-02-01 00:00:00
abstract：AIMS:The effects of serelaxin, a recombinant form of human relaxin-2 peptide, on vascular function in the coronary microvascular and systemic macrovascular circulation remain largely unknown. This mechanistic, clinical study assessed the effects of serelaxin on myocardial perfusion, aortic stiffness, and safety in pati...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/cvz345
更新日期：2021-01-01 00:00:00
abstract：AIMS:Expression of extracellular matrix protein CCN1 is induced in end-stage ischaemic cardiomyopathy in humans, and after cardiac ischaemia and reperfusion in experimental animal models. Despite its well-documented angiogenic activities, CCN1 increases the cytotoxicities of the tumour necrosis factor family cytokines,...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/cvt001
更新日期：2013-04-01 00:00:00
abstract：:The development of the heart is a complex process during which different cell types progressively contribute to shape a four-chambered pumping organ. Over the last decades, our understanding of the specification and transcriptional regulation of cardiac development has been greatly augmented as has our understanding o...
journal_title：Cardiovascular research
pub_type： 杂志文章,评审
doi：10.1093/cvr/cvr078
更新日期：2011-07-15 00:00:00
abstract：OBJECTIVES:Age-related medial calcification (elastocalcinosis) of large arteries is accelerated in diabetes and appears mainly in distal arteries. The aim was to devise a rat model of elastocalcinosis in association with diabetes to examine the hypothesis that diabetes accelerates vascular calcification experimentally....
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/j.cardiores.2006.11.001
更新日期：2007-02-01 00:00:00
abstract：:The left ansa subclavia was stimulated at supramaximal intensity at a frequency of Hz in open-chest, anaesthetized dogs for periods of about 10 min. Arterial blood pressure, myocardial contractile force, and coronary sinus blood flow reached peak values after 1 or 2 min of stimulation, and then declined gradually thro...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/10.5.549
更新日期：1976-09-01 00:00:00
abstract：OBJECTIVE:The aim was to investigate whether intrinsic cardiac neurones can be involved in the genesis of ventricular arrhythmias. METHODS:Nicotinic, muscarinic, beta adrenergic, peptidergic, and amino acidergic agonists, as well as purinergic compounds, were individually administered in microliter quantities adjacent...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/28.5.636
更新日期：1994-05-01 00:00:00
abstract：AIMS:P2X receptors (P2XRs) mediate sympathetic control and autoregulation of renal circulation triggering preglomerular vasoconstriction, which protects glomeruli from elevated pressures. Although previous studies established a casual link between glomerular susceptibility to hypertensive injury and decreased preglomer...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/cvu249
更新日期：2015-02-01 00:00:00
abstract：:This paper puts emphasis on pioneers who developed cardiac flow dynamics concepts during the second half of the 20th century at a period where pressure measurements were the rule. Thinking flow instead of pressure dynamics corresponded to in-depth conceptual changes: whereas blood pressure generally has a single posit...
journal_title：Cardiovascular research
pub_type： 社论,历史文章
doi：10.1016/s0008-6363(01)00307-8
更新日期：2001-08-01 00:00:00
abstract：BACKGROUND:We, and others, have previously reported a strong correlation between increased inter-ventricular dispersion of repolarization and the occurrence of fatal arrhythmia in animal models of CHF. The existence of this and other such distinct electrophysiologic phenotypes in right (RV) vs. left ventricles (LV) cou...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/s0008-6363(02)00703-4
更新日期：2003-02-01 00:00:00
abstract：OBJECTIVE:Calcitonin gene related peptide (CGRP) is a potent vasodilator found in sensory nerve endings in coronary arteries. The effect of intravenous CGRP on myocardial ischaemia, cardiovascular haemodynamics, and epicardial coronary artery stenoses was studied in patients with angina to investigate the possible role...
journal_title：Cardiovascular research
pub_type： 临床试验,杂志文章
doi：10.1093/cvr/27.8.1477
更新日期：1993-08-01 00:00:00
abstract：OBJECTIVE:The aim was to evaluate the hypothesis that the oxygen demand of stimulated myocardium is downregulated and ischaemia avoided when oxygen supply is limited. METHODS:Isoprenaline stimulation during reduced coronary perfusion pressure or moderate coronary hypoxaemia was studied in relation to myocardial oxygen...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/27.8.1542
更新日期：1993-08-01 00:00:00
abstract：:The interest in mouse electrophysiology is expanding fast, despite the marked differences between mouse and man. Different methods have become available to analyse the electrical activity in the mouse heart in vivo. The mouse genome can be altered with relative ease, which allows the molecular dissection of the variou...
journal_title：Cardiovascular research
pub_type： 评论,杂志文章,评审
doi：10.1016/s0008-6363(99)00335-1
更新日期：2000-01-01 00:00:00
abstract：:Isolated, buffer perfused guinea pig hearts were used to study the effects of sotalol on arrhythmias and electrophysiology during 30 min of myocardial ischaemia, induced by reducing coronary flow to 10% of control, and subsequent reperfusion. Action potentials were recorded using the floating microelectrode technique ...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/18.7.397
更新日期：1984-07-01 00:00:00
