Abstract：
:The vulnerable period (VP) is an interval of time during the cardiac cycle within which premature stimulation may lead to trains of responses (one: many stimulus-response coupling). Although the VP parallels the recovery of sodium channel availability, modulators of its boundaries remain unclear. Numerical studies of a uniform cable demonstrated that reduction in sodium channel availability increased the range of premature stimuli, resulting in unidirectional block, a precursor of reentrant activation. Consequently, we hypothesized that the kinetics of use-dependent sodium channel blockade could reflect one dimension of a drug's proarrhythmic potential. In strips from guinea pig right ventricle, we probed the boundaries of the VP in the presence of use-dependent sodium channel antagonists utilizing a train of stimuli followed by a premature stimulus. Under drug-free conditions when the sites of drive and premature stimulation were the same, the VP was less than 4 ms in duration. When the drive and premature sites were different, the drug-free VP was greater than 5 ms in 22 of 24 preparations and 0 in the other two, with an average VP duration of 16 +/- 10 ms (mean +/- SD). In the presence of 1 microM moricizine, VP = 17 +/- 4 ms; 12 microM moricizine, VP = 35 +/- 4 ms; 3 microM flecainide, VP = 50 +/- 17 ms; and 4 microM quinidine, VP = 2 +/- 1 ms. These results suggest that residual unsuppressed premature ventricular contractions (PVCs) in the presence of some class 1 drugs have a greater potential for initiating a proarrhythmic response than PVCs in the absence of a class 1 drug.
journal_name
J Cardiovasc Pharmacoljournal_title
Journal of cardiovascular pharmacologyauthors
Nesterenko VV,Lastra AA,Rosenshtraukh LV,Starmer CFsubject
Has Abstractpub_date
1992-05-01 00:00:00pages
810-20issue
5eissn
0160-2446issn
1533-4023journal_volume
19pub_type
杂志文章abstract：:The aim of this study was to determine whether tumor necrosis factor (TNF)-alpha would impair basal and stimulated endothelium-dependent vasomotion in human resistance vessel. Changes in baseline and acetylcholine (ACh)-induced forearm vascular resistance (FVR) were measured plethysmographically before and after a low...
journal_title：Journal of cardiovascular pharmacology
pub_type： 临床试验,杂志文章
doi：10.1097/00005344-200010000-00011
更新日期：2000-10-01 00:00:00
abstract：:The present study was designed to evaluate the effects of big endothelin (ET) on renal hemodynamics and excretory functions in rats with experimental congestive heart failure (CHF) produced by aortocaval fistula. Clearance studies were performed in control and in chronic (7 day) CHF rats. Administration of bit ET (1 a...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：
更新日期：1995-01-01 00:00:00
abstract：:We studied the effect of an intravenous (i.v.) infusion of diltiazem (15 micrograms/kg/min) given for 1 week on several cardiovascular parameters, renal blood flow, and electrolyte and urinary excretion in chronically instrumented DOCA-salt hypertensive dogs. On the first recording session, 24 h after diltiazem infusi...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：10.1097/00005344-198806000-00015
更新日期：1988-06-01 00:00:00
abstract：:To determine whether differential release of nitric oxide underlies the diversity of regional kidney blood flow responses to vasoactive agents, this study examined how nitric oxide synthase blockade with IV N(G)-nitro-L-arginine (L-NNA), and also IV L-NNA plus co-infusion of glyceryl trinitrate, affected responses to ...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：10.1097/00005344-200208000-00006
更新日期：2002-08-01 00:00:00
abstract：:Mikania laevigata, popularly known in Brazil as guaco, is widely used for respiratory disorders. As this plant is rich in coumarins, there is evidence of indications that it may cause bleeding and therefore should not be used concomitantly with anticoagulants. The basis of this information is very theoretical, with no...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：10.1097/FJC.0000000000000745
更新日期：2019-12-01 00:00:00
abstract：:The effects of angiotensin-converting enzyme inhibitor captopril on infarct size and cardiovascular hemodynamics were studied in 35 conscious dogs subjected to 24 h of coronary occlusion. Following occlusion of the left anterior descending coronary artery, 10 dogs were infused with captopril 0.25 mg/kg/h i.v. (group 1...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：
更新日期：1984-11-01 00:00:00
abstract：:The electromechanical effects of UK-68,798 (UK), a novel class III antiarrhythmic drug, were studied in guinea pig and rat papillary muscles (PMs) and atria in vitro using conventional microelectrode technique. UK (10(-8)-10(-6) M) prolonged the action potential duration (APD) by 21-58% and effective refractory period...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：10.1097/00005344-199009000-00008
更新日期：1990-09-01 00:00:00
abstract：BACKGROUND:Long noncoding RNA taurine-upregulated gene 1 (TUG1) has been reported to involve in the processing of cardiac ischemia/reperfusion injury after myocardial infarction. Thus, this study further investigates the underlying mechanisms of TUG1 in hypoxia/reoxygenation (H/R)-induced cardiomyocyte injury in vitro....
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：10.1097/FJC.0000000000000895
更新日期：2020-11-01 00:00:00
abstract：:Peroxisome proliferator-activated receptors (PPAR) play a critical physiological role in energy homeostasis, in inflammation, and a protective role in cardiovascular function. We assessed the antioxidant effect of clofibrate-induced Peroxisome proliferator-activated receptor alpha (PPARα) stimulation on ischemic myoca...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：10.1097/FJC.0b013e31826216ed
更新日期：2012-10-01 00:00:00
abstract：:A hallmark of vascular disease is the inappropriate proliferative and synthetic behavior of smooth muscle cells. This phenotypically immature behavior arises as a consequence of the myocytes undergoing conversion from a contractile to proliferative/secretory cell type. The stimulus invoked for this dedifferentiative p...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章,评审
doi：
更新日期：1992-01-01 00:00:00
abstract：:The effects of potent coronary vasodilator, 2- phenylaminoadenosine (CV-1808), on coronary circulatory failure and thromboxane (TX) A2 release were studied during coronary occlusion (for 60 min) and subsequent reperfusion (for 60 min) in anesthetized dogs. During coronary reperfusion, reactive hyperemic response was a...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：10.1097/00005344-198405000-00011
更新日期：1984-05-01 00:00:00
abstract：:We wished to determine whether angiotensin-converting enzyme (ACE) inhibition alters the effect of hypoxia and reoxygenation directly on the cardiac myocyte; to compare two different ACE inhibitors, one with and one without a sulfhydryl group (i.e., captopril and cilazapril), and to examine the potential interaction o...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：10.1097/00005344-199203000-00015
更新日期：1992-03-01 00:00:00
abstract：:This study investigated the effect of pioglitazone, an insulin sensitizer, on metabolic abnormalities and oxidative stress as a cause of myocardial collagen accumulation in prediabetic rat hearts. Twenty male diabetic rats and 9 male nondiabetic age-matched rats were used. The diabetic rats were divided into two group...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：10.1097/00005344-200112000-00008
更新日期：2001-12-01 00:00:00
abstract：:The hypotensive effects of ketanserin, a selective blocker of 5-hydroxytryptamine2, are well defined, but its electrophysiologic effects in humans are not. Intravenous ketanserin (0.15 mg/kg) was therefore given to 10 patients undergoing electrophysiologic evaluation, and data were obtained before and after drug admin...
journal_title：Journal of cardiovascular pharmacology
pub_type： 临床试验,杂志文章
doi：
更新日期：1987-01-01 00:00:00
abstract：:Anakinra is a recombinant human interleukin 1 receptor antagonist that competes and blocks the biologic effects of interleukin 1, reducing systemic inflammatory responses. In the 2015 guidelines for the diagnosis and management of pericardial diseases of the European Society of Cardiology, anakinra was established as ...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章,评审
doi：10.1097/FJC.0000000000000839
更新日期：2020-07-01 00:00:00
abstract：:We compared left ventricular (LV) hemodynamics, LV muscle mass (LVMM), and LV geometry of 13 spontaneously hypertensive rats (SHRs) treated for 20 weeks with nifedipine (30 mg/kg/day) with those of 11 age-matched untreated SHRs. LVMM, LVMM related to end-diastolic volume (LVMM/EDV), LV pressure (PLV), systolic wall st...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：10.1097/00005344-198301000-00008
更新日期：1983-01-01 00:00:00
abstract：:Establishing the overall efficacy or safety of a drug requires a unified methodological approach and analysis of all clinical trials that are intended to be summarized. As an example, this article presents the aggregated dose-response relationship and a subgroup analysis (by age) over all studies of the antihypertensi...
journal_title：Journal of cardiovascular pharmacology
pub_type： 临床试验,杂志文章,meta分析
doi：10.1097/00005344-199219001-00025
更新日期：1992-01-01 00:00:00
abstract：:A subset of essential hypertensives sensitive to salt and having normal or high renin levels are termed nonmodulators. These subjects fail to modulate their renal blood flow and aldosterone responsiveness when dietary sodium is changed. We have found that a positive family history of hypertension in a first degree rel...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：
更新日期：1988-01-01 00:00:00
abstract：:Alpha 2-adrenoceptor agonists are effective antihypertensive drugs that may provide particular advantages in the treatment of many types of patients. Of those now available, guanabenz has been shown to lower serum cholesterol concentration and not to cause sodium and water retention, offering additional protection aga...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：
更新日期：1985-01-01 00:00:00
abstract：:Numerous studies have demonstrated that immune effector mechanisms cause serious heart diseases, among which are heart transplant rejection, myocarditis, and the resulting dilated cardiomyopathy, as well as Chagas' disease. Whereas different effectors of the immune system can affect cardiac function, this review prima...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章,评审
doi：10.1097/00005344-200108000-00016
更新日期：2001-08-01 00:00:00
abstract：:Ghrelin is a novel growth hormone (GH)-releasing peptide, isolated from the stomach, which is identified as an endogenous ligand for GH secretagogues receptor. Although both ghrelin and its specific receptor are expressed in blood vessels, the cardiovascular effects of ghrelin remain unknown. To clarify whether ghreli...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：10.1097/00005344-200206000-00001
更新日期：2002-06-01 00:00:00
abstract：:Since minoxidil was previously shown to raise plasma renin activity (PRA) but not the plasma aldosterone concentration (PAC), the effect of minoxidil on the rate of aldosterone metabolic clearance was studied. After the addition of minoxidil to the antihypertensive regimen of 7 hypertensive patients, the aldosterone m...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：10.1097/00005344-198000022-00018
更新日期：1980-01-01 00:00:00
abstract：:The superoxide radical scavenging effects of the SH group in the captopril molecule has been proposed to be the basis of the "cadioprotective" effect of this angiotensin converting enzyme (ACE) inhibitor in animal models of myocardial injury. We determined the effects of captopril, another ACE inhibitor with an SH gro...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：10.1097/00005344-199011000-00023
更新日期：1990-11-01 00:00:00
abstract：:The aim of this study was to investigate whether the HMG-CoA reductase inhibitor cerivastatin alters the nitric oxide (NO) bioavailability of porcine aortic endothelial cell cultures and of native porcine coronary endothelium, after short-term (minutes) and long-term (24-hour) treatment with cerivastatin (electrochemi...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：10.1097/00005344-200309000-00006
更新日期：2003-09-01 00:00:00
abstract：:In isolated rat tail arteries perfused with Krebs-Henseleit solution, ouabain, in concentrations of less than 10(-5) M, caused a concentration-dependent, noncompetitive inhibition of the vasoconstrictor response to phenylephrine. Concentrations of 10(-8) and 10(-6) M caused 30 and 61% inhibition, respectively. The inh...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：10.1097/00005344-198507000-00013
更新日期：1985-07-01 00:00:00
abstract：:We have previously demonstrated that cocaine induces apoptosis in primary cultures of fetal rat cardiomyocytes. The current study was designed to determine whether cocaine administered to the mother during pregnancy induced apoptosis in fetal rat heart. Pregnant rats were treated with cocaine subcutaneously (30 and 60...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：10.1097/00005344-200106000-00001
更新日期：2001-06-01 00:00:00
abstract：:Both in the periphery and in the central nervous system, alpha-adrenoceptors can be subdivided into alpha 1-types. alpha 1-Receptors are sensitive to low concentrations of the agonists phenylephrine and methoxamine, and of the antagonists corynanthine and prazosin. alpha 1-Receptors are sensitive to low concentrations...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：10.1097/00005344-198200041-00002
更新日期：1982-01-01 00:00:00
abstract：:Enhanced renin-angiotensin activity causes hypertension and cardiac hypertrophy. The angiotensin (Ang)-converting enzyme (ACE)2/Ang(1-7)/Mas axis pathway functions against Ang II type 1 receptor (AT1R) signaling. We investigated whether olmesartan (Olm), an AT1R blocker, inhibits cardiac hypertrophy independently of b...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：10.1097/FJC.0000000000000374
更新日期：2016-06-01 00:00:00
abstract：:Few studies have addressed the possibility that brain natriuretic peptide (BNP) possesses a profile of bioactivity that is distinct from that of atrial natriuretic peptide (ANP). Accordingly, we assessed the biologic actions of BNP in the setting of maximal or near-maximal ANP-induced biologic activity. Background ANP...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：10.1097/00005344-199902000-00008
更新日期：1999-02-01 00:00:00
abstract：:Calcium channel blockade appears to be at least as effective as beta-blockade in the treatment of anginal syndromes, but whether a similar protective effect is afforded against sudden death is unknown. In order to compare experimental antifibrillatory effects of calcium channel blockade (diltiazem), beta-adrenoceptor ...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：10.1097/00005344-198409000-00007
更新日期：1984-09-01 00:00:00
