Depression of efferent parasympathetic control of heart rate in rats with myocardial infarction: effect of losartan.

Abstract:

:Heart failure is associated with attenuation of parasympathetic nervous function and enhanced renin-angiotensin activity. We tested whether there was a dysfunction in the efferent cholinergic neurotransmission in the heart of rats with chronic myocardial infarction (MI) and the potential role of angiotensin II (Ang II) receptors in such changes. Rats with MI and sham-operation were anesthetized, and heart rate (HR) reduction in response to vagal nerve stimulation was measured before and after losartan administration (10 mg/kg, i.v.) in the presence or absence of physostigmine to inhibit acetylcholinesterase. Infarcted rats had an average infarct size (IS) of 38% of the left ventricle (LV), depressed LV dP/dtmax, elevated LVEDP, and cardiac hypertrophy. Nerve stimulation (1-16 Hz) reduced HR in a frequency-dependent manner. The bradycardiac responses were significantly attenuated in infarcted versus control rats (p < 0.01), indicating an impaired efferent vagal tone. In contrast, the bradycardic response to exogenous acetylcholine was similar in both groups, implying an unchanged muscarinic receptor responsiveness in hearts with MI. HR response to nerve stimulation was potentiated by losartan in infarcted rats by 21 +/- 4 versus 4 +/- 2 beats/min (p < 0.01) but was unaffected in control rats. This effect of losartan was inversely related to the extent of attenuation of vagally mediated HR reduction. IS was correlated with both the extent of attenuation in vagally mediated bradycardia and the effect of losartan. In conclusion, the efferent vagal control of HR is attenuated in rats with MI and heart failure. This attenuation may be partly due to a presynaptic inhibition of acetylcholine release through the tonic activation, by Ang II, of neuronal AT1 receptors.

journal_name

J Cardiovasc Pharmacol

authors

Du XJ,Cox HS,Dart AM,Esler MD

doi

10.1097/00005344-199806000-00019

subject

Has Abstract

pub_date

1998-06-01 00:00:00

pages

937-44

issue

6

eissn

0160-2446

issn

1533-4023

journal_volume

31

pub_type

杂志文章
  • Antihypertensive therapy with the long-acting calcium antagonist nitrendipine.

    abstract::The antihypertensive efficacy of the calcium entry blocker nitrendipine administered as monotherapy (20-80 mg; mean, 36/day) on the average for 144 days to 46 patients with essential hypertension (WHO I and II) was investigated in relation to age, pretreatment blood pressure, and plasma renin activity. In addition, we...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:

    authors: Müller FB,Bolli P,Erne P,Block LH,Kiowski W,Bühler FR

    更新日期:1984-01-01 00:00:00

  • Future management of high blood pressure.

    abstract::Both population (mass) strategies and targeted strategies for the management of high blood pressure are necessary. However, it has yet to be proven that reducing blood pressure by lifestyle changes in the population will confer the same cardiovascular benefit that results from lowering blood pressure by drugs. It is i...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章,评审

    doi:10.1097/00005344-199627003-00008

    authors: Johnston CI

    更新日期:1996-01-01 00:00:00

  • Hemodynamic effects of isoprostanes (8-iso-prostaglandin F2alpha and E2) in isolated guinea pig hearts.

    abstract::Isoprostanes are a family of prostaglandin-related compounds formed from arachidonic acid in a cyclooxygenase-independent manner as products of free radical-initiated lipid peroxidation. To elucidate the biological activity of the F2-and E2-isoprostanes, 8-iso-prostaglandin F2alpha (8-iso-PGF2alpha) and 8-iso-prostagl...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/00005344-199706000-00012

    authors: Möbert J,Becker BF,Zahler S,Gerlach E

    更新日期:1997-06-01 00:00:00

  • Endothelin-1-induced vascular contractions: interactions with drugs affecting the calcium channel.

    abstract::Recently, a potent vasoconstrictor peptide, endothelin-1 (ET-1), was isolated from vascular endothelial cells. We investigated the inhibition of ET-1-induced contractions on isolated porcine coronary artery and rabbit aorta by calcium antagonists of the 1,4-dihydropyridine type. In addition, the vasoconstriction induc...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:

    authors: Stasch JP,Kazda S

    更新日期:1989-01-01 00:00:00

  • Relationship between the sympatholytic action of nebivolol and hypotension.

    abstract::Nebivolol, a chemically novel beta 1-adrenoceptor antagonist, acutely lowers blood pressure in spontaneously hypertensive rats, anaesthetised normotensive dogs, and hypertensive patients. We have investigated the actions of dl-nebivolol in five conscious normotensive rabbits (sham, mean blood pressure (BP) of 82.2 +/-...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:

    authors: Ward JE,Coles P,Cox H,Eisenhofer G,Angus JA

    更新日期:1992-07-01 00:00:00

  • Interaction between NO donors and iloprost in human vascular smooth muscle, platelets, and leukocytes.

    abstract::Endothelium-derived relaxing factor (EDRF) and donors of nitric oxide (NO) (glyceryl trinitrate, SIN-1--a metabolite of molsidomine--S-nitroso-N-acetyl-penicillamine, and sodium nitroprusside) but not prostacyclin and its analog, iloprost, relax strips of rabbit aorta. Strips of human coronary artery also relax when e...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:

    authors: Gryglewski RJ,Korbut R,Trabka-Janik E,Zembowicz A,Trybulec M

    更新日期:1989-01-01 00:00:00

  • Effects of p38 MAPK Inhibitor on angiotensin II-dependent hypertension, organ damage, and superoxide anion production.

    abstract::Angiotensin II (Ang II) activates p38 mitogen-activated protein kinase (p38 MAPK) and increases reactive oxygen species (ROS), but the nature of the relationship in vivo is not fully understood. We assess the effect of SB239063AN, a highly selective, orally active, p38 MAPK inhibitor, on Ang II-dependent hypertension,...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/FJC.0b013e318046f34a

    authors: Bao W,Behm DJ,Nerurkar SS,Ao Z,Bentley R,Mirabile RC,Johns DG,Woods TN,Doe CP,Coatney RW,Ohlstein JF,Douglas SA,Willette RN,Yue TL

    更新日期:2007-06-01 00:00:00

  • ACE inhibition but not angiotensin II antagonism reduces plasma fibrinogen and insulin resistance in overweight hypertensive patients.

    abstract::The aim of this study was to compare the effects of the angiotensin-converting enzyme (ACE) inhibitor perindopril and the angiotensin II antagonist losartan on insulin sensitivity and plasma fibrinogen in overweight hypertensive patients. Twenty-eight overweight mild to moderate [diastolic blood pressure (DBP) >90 and...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 临床试验,杂志文章,随机对照试验

    doi:10.1097/00005344-199810000-00014

    authors: Fogari R,Zoppi A,Lazzari P,Preti P,Mugellini A,Corradi L,Lusardi P

    更新日期:1998-10-01 00:00:00

  • Ethanol reduces the endothelin-B receptor-mediated increase in portal inflow resistance in the isolated, perfused canine liver.

    abstract::Ethanol can affect the regulation of liver hemodynamics through the release of vasoactive mediators such as nitric oxide and endothelins (ETs). The purpose of this study was to investigate the effects of ethanol on the changes in arterial and portal perfusion pressure induced by ET receptor activation. Ethanol signifi...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/00005344-199800001-00079

    authors: Faro F,Ferraz JG,Stella HJ,Faro R,Antunes E,Opgennorth TJ,Withrington PG,de Nucci G

    更新日期:1998-01-01 00:00:00

  • Safety and Efficacy of Underdosing Non-vitamin K Antagonist Oral Anticoagulants in Patients Undergoing Catheter Ablation for Atrial Fibrillation.

    abstract:BACKGROUND:Some patients with atrial fibrillation (AF) received underdoses of non-vitamin K antagonist oral anticoagulants (NOACs) in the real world. Underdosing is defined as administration of a dose lower than the manufacturer recommended dose. OBJECTIVES:To identify the efficacy and safety of underdosing NOACs as p...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/FJC.0000000000000448

    authors: Yamaji H,Murakami T,Hina K,Higashiya S,Kawamura H,Murakami M,Kamikawa S,Komatsubara I,Kusachi S

    更新日期:2017-02-01 00:00:00

  • Effect of albumin on the electrophysiologic stability of isolated perfused rabbit hearts.

    abstract::The electrophysiologic stability of isolated perfused rabbit hearts was evaluated over a period of 5 h. Hearts perfused with protein-free buffer deteriorated over time, with significant shortening of the ventricular effective refractory period (ERP) and development of ventricular fibrillation. When serum albumin (6.01...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:

    authors: Kates RE,Yee YG,Hill I

    更新日期:1989-01-01 00:00:00

  • Effect of morning and bedtime dosing with cilnidipine on blood pressure, heart rate, and sympathetic nervous activity in essential hypertensive patients.

    abstract::Cilnidipine has a blocking action against N-type calcium channels as well as L-type calcium channels. We studied the effect of morning and bedtime dosing on circadian variation of blood pressure (BP), heart rate (HR), and activity of the autonomic nervous system, using an open randomized crossover study in 13 essentia...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 临床试验,杂志文章,随机对照试验

    doi:10.1097/00005344-200401000-00011

    authors: Kitahara Y,Saito F,Akao M,Fujita H,Takahashi A,Taguchi H,Hino T,Otsuka Y,Kushiro T,Kanmatsuse K

    更新日期:2004-01-01 00:00:00

  • Effect of autonomic blockade on the hemodynamic responses of normal human subjects to acute intravenous milrinone.

    abstract::We studied the hemodynamic effects of four doses of milrinone, administered by intravenous (i.v.) infusion alone and after autonomic blockade with prazosin, propranolol, atropine, and clonidine. Plasma concentrations of milrinone (50-600 ng/ml) were similar to those used for the treatment of cardiac failure and were u...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/00005344-198705000-00002

    authors: Hasking GJ,Dewar E,Nelson L,Oddie CJ,Bobik A,Jennings GL

    更新日期:1987-05-01 00:00:00

  • Forskolin-stimulated adenylyl cyclase activity is decreased but beta 2-adrenoceptor function is unchanged in primary hypertension.

    abstract::beta 2-Adrenoceptor function may be decreased in primary hypertension, resulting in increased peripheral resistance. To study the beta 2-adrenoceptor function, we used circulating mononuclear leukocytes (MNL) as a model system. Twenty untreated hypertensive subjects [(HT) 10 men and 10 women] and 20 age- and sex-match...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/00005344-199311000-00004

    authors: Blankesteijn WM,Willems PH,Graafsma SJ,de Pont JJ,Thien T

    更新日期:1993-11-01 00:00:00

  • Oral naftidrofuryl prevents platelet hyperreactivity ex vivo and inhibits functional desensitization to prostacyclin in hypercholesterolemic rabbits.

    abstract::Among other mediators, platelet-derived serotonin (5-HT) may contribute to thromboembolic complications of atherosclerosis. We determined whether long-term oral treatment with the 5-HT2 antagonist naftidrofuryl (NAF, 50 mg/kg daily for 12 weeks) alters platelet function in cholesterol-fed (1%) rabbits. Hypercholestero...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/00005344-199302000-00021

    authors: Weber AA,Hohlfeld T,Strobach H,Schrör K

    更新日期:1993-02-01 00:00:00

  • Relaxation of human coronary artery and arteria mammaria by K(+)-channel openers.

    abstract::Three agents with K(+)-channel-opening activity--nicorandil, bimakalim (EMD 52692), and EMD 56431--were tested for vasorelaxation abilities in human coronary artery and human arteria mammaria. The potency orders were bimakalim = EMD 56431 > nicorandil for relaxation in human coronary artery and bimakalim = EMD 56431 >...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/00005344-199206203-00004

    authors: Bossaller C,Auch-Schwelk W,Graf K,Gräfe M,Catadelgirmen G,Ennker J,Fleck E

    更新日期:1992-01-01 00:00:00

  • Presynaptic beta-adrenoceptors in guinea pig papillary muscle: evidence for adrenaline-mediated positive feedback on noradrenergic transmission.

    abstract::Guinea pig papillary muscles were preincubated in the presence of 5 x 10(-9) mol/L unlabeled noradrenaline or adrenaline then incubated with (3H)-noradrenaline and superfused. Electrical field stimulation with 180 pulses delivered at 1 or 3 Hz was used to induce overflow of radioactivity. Comparison of the effects of ...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/00005344-199102000-00011

    authors: Valenta B,Singer EA

    更新日期:1991-02-01 00:00:00

  • Tissue contents of endothelin vary according to thyroid hormone status in rat.

    abstract::Endothelin-1 (ET-1) is a 21-residue peptide isolated from the conditioned medium of cultured porcine endothelial cells and is widely distributed throughout the body, with relatively high levels in the kidney and lung. In this study we examined the influence of thyroid hormone status on immunoreactive endothelin (ir-ET...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/00005344-199322008-00078

    authors: Lam HC,Wang JP,Lee JK,Ho LT,Han TM,Lu CC,Chiang HT,Cheng DL

    更新日期:1993-01-01 00:00:00

  • Endogenous prostaglandins limit angiotensin-II induced regional vasoconstriction in conscious rats.

    abstract::In conscious rats, we tested the hypothesis that prostaglandins attenuate regional vasoconstriction caused by acute infusion of angiotensin II. Mean arterial pressure, regional blood flow, and vascular conductance in response to 2-minute infusions of 0.05 or 1 microg/kg/min Ang II were assessed before and during indom...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/00005344-200307000-00002

    authors: Stebbins CL,Symons JD,Hageman KS,Musch TI

    更新日期:2003-07-01 00:00:00

  • Amlodipine inhibition of serum-, thrombin-, or fibroblast growth factor-induced vascular smooth-muscle cell proliferation.

    abstract::Atherosclerosis, like several other vascular diseases, exhibits structural and functional abnormalities resulting partially from an exaggerated proliferation of vascular smooth-muscle cells (VSMCs). Ca2+ channel blockers, such as amlodipine, have been suggested to retard or even prevent the progression of atherosclero...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/00005344-199805000-00019

    authors: Stepien O,Gogusev J,Zhu DL,Iouzalen L,Herembert T,Drueke TB,Marche P

    更新日期:1998-05-01 00:00:00

  • Safety and pharmacologic activity of a new nitrate ester, ITF 296, after intravenous administration in healthy volunteers.

    abstract::To evaluate the safety and pharmacologic activity of ITF 296 in humans, three groups of healthy male normotensive subjects were studied. The first two groups (six subjects each) received, in ascending order, three dose levels of ITF 296 by 30-min intravenous infusion (group I, 0.1, 0.5, 1.0 microgram/kg/min; group II,...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 临床试验,杂志文章,随机对照试验

    doi:

    authors: Sardina M,Love R,Mizrahi J,Monzani V,Bianchini C

    更新日期:1995-01-01 00:00:00

  • Microsomal Prostaglandin E Synthase-1 Expression by Aortic Smooth Muscle Cells Attenuates the Differentiated Phenotype.

    abstract::The development of numerous types of cardiovascular disease is associated with alteration of the vascular smooth muscle cell (SMC) phenotype. We have previously shown that abdominal aortic aneurysm progression in a mouse model of the disease is associated with reduced differentiation of SMCs within the lesion and that...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/FJC.0000000000000395

    authors: Adedoyin OO,Loftin CD

    更新日期:2016-08-01 00:00:00

  • Renal and depressor effects of SQ 29,072, a neutral endopeptidase inhibitor, in conscious hypertensive rats.

    abstract::The depressor and renal responses to the neutral endopeptidase (NEP) inhibitor, SQ 29,072, were characterized in both the conscious spontaneously hypertensive rat (SHR) and the conscious deoxycorticosterone acetate (DOCA)/salt hypertensive rat. Inhibition of tissue NEP activity by pharmacologically active doses was al...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/00005344-199007000-00022

    authors: Seymour AA,Norman JA,Asaad MM,Fennell SA,Swerdel JN,Little DK,Dorso CR

    更新日期:1990-07-01 00:00:00

  • Pioglitazone improves left ventricular diastolic function and decreases collagen accumulation in prediabetic stage of a type II diabetic rat.

    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

    authors: Tsuji T,Mizushige K,Noma T,Murakami K,Ohmori K,Miyatake A,Kohno M

    更新日期:2001-12-01 00:00:00

  • Hemodynamic and cardiac anti-hypertrophic actions of clonidine in Goldblatt one-kidney, one-clip rats.

    abstract::In congestive heart failure, the chronic sympathetic hyperactivity contributes to a poor prognosis. In this respect, clonidine, a centrally acting sympathoinhibitory drug, has previously been tested in clinical trials. The aim of the current study was to evaluate the effects of clonidine on morbidity and mortality in ...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/00005344-200302000-00008

    authors: Thomas L,Gasser B,Bousquet P,Monassier L

    更新日期:2003-02-01 00:00:00

  • Treatment of hypertension: a clinical epidemiologist's view.

    abstract::The majority of deaths attributable to hypertension are coronary artery disease (CAD) deaths and, consequently, the prevention of CAD should be the primary aim of hypertension management. Recent meta-analyses confirm the results of the individual hypertension intervention trials, which demonstrated a disappointing sho...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章,评审

    doi:

    authors: Poulter NR

    更新日期:1991-01-01 00:00:00

  • Modification of nitrovasodilator effects on vascular smooth muscle by exogenous GTP and guanosine.

    abstract::The effects of exogenous guanosine 5'-triphosphate (GTP) and guanosine on nitroglycerin-, sodium nitrite- and SIN-1-induced guanosine 3',5'-cyclic monophosphate (cyclic GMP) accumulation and smooth muscle relaxation were studied using endothelium-denuded rat mesenteric artery rings precontracted with noradrenaline. Pr...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/00005344-199112000-00013

    authors: Vuorinen P,Pörsti I,Metsä-Ketelä T,Manninen V,Vapaatalo H,Laustiola KE

    更新日期:1991-12-01 00:00:00

  • Crataegus special extract WS 1442 increases force of contraction in human myocardium cAMP-independently.

    abstract::The mode of action of Crataegus extracts in the treatment of heart failure is still under examination. WS 1442, a standardized special extract from Crataegus leaves with flowers, exerts direct positive inotropic effects. This study was designed to investigate the mode of inotropic action of WS 1442 in human myocardium...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/00005344-200005000-00004

    authors: Schwinger RH,Pietsch M,Frank K,Brixius K

    更新日期:2000-05-01 00:00:00

  • Epidemiological studies on the relationship between sodium, potassium, calcium, and magnesium and arterial blood pressure.

    abstract::Populations with a high sodium intake have a high prevalence of hypertension and a high mortality and morbidity due to cerebrovascular disease. Within populations, however, it is very difficult to demonstrate a significant correlation between sodium intake and blood pressure. Experimental evidence exists demonstrating...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/00005344-198400061-00030

    authors: Kesteloot H

    更新日期:1984-01-01 00:00:00

  • Endothelin-3 inhibits ganglionic transmission at preganglionic sites through activation of endogenous thromboxane A2 production in dog cardiac sympathetic ganglia.

    abstract::The effects of endothelin-3 (ET-3) on ganglionic transmission of dog cardiac sympathetic ganglia and possible mechanisms involved were investigated in vivo and in vitro. Positive chronotropic responses to preganglionic stellate stimulation and those to dimethylphenylpiperazinium as well as McN-A-343 administered to th...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/00005344-199100177-00056

    authors: Kushiku K,Ohjimi H,Yamada H,Tokunaga R,Furukawa T

    更新日期:1991-01-01 00:00:00