Abstract：
:The positive inotropic action of phenylephrine in cardiac muscle is mediated by alpha- and beta-adrenoceptors. Data suggest the responsiveness of myocardium to inotropic agents is altered in cardiac disease. We evaluated the actions of phenylephrine on isometric contraction and K+-induced contracture in isolated cat right ventricular muscle from normal hearts and hearts with partial pulmonary artery ligation-induced pressure overload of 5-11 days in duration. Peak contractile force (Po) and rate of force development (dP/dt) were lower (p less than or equal to 0.005) in pressure-overloaded (0.59 +/- 0.2 g/mm2 and 4.6 +/- 1.7 g/s/mm2, respectively) than in normal (1.33 +/- 0.2 g/mm2 and 10.5 +/- 1.6 g/s/mm2, respectively) muscle. Phenylephrine (10(-6), 5 X 10(-6), and 10(-5) M) significantly (p less than or equal to 0.01) increased Po and dP/dt in normal but not in pressure-overloaded muscle. Phenylephrine (5 X 10(-6) M) reduced peak K+-induced contracture force (Pc) similarly in normal (-30 +/- 8%) and pressure-overloaded (-36 +/- 11%) muscles. beta-Adrenergic blockade (nadolol, 10(-4) M) reduced, but did not abolish, the "relaxant" action of the drug on Pc in both muscle groups. The lack of a positive inotropic effect of phenylephrine in pressure-overloaded muscle suggests a derangement in both alpha- and beta-adrenoceptor function in this model of cardiac disease.
journal_name
J Cardiovasc Pharmacoljournal_title
Journal of cardiovascular pharmacologyauthors
Gaide MS,Wiggins JR,Fitterman WS,Cameron JS,Myerburg RJ,Bassett ALdoi
10.1097/00005344-198403000-00005subject
Has Abstractpub_date
1984-03-01 00:00:00pages
238-43issue
2eissn
0160-2446issn
1533-4023journal_volume
6pub_type
杂志文章abstract：:Hypertension is a well-known risk factor that predisposes to the development of left ventricular hypertrophy, coronary flow abnormalities, and systolic and diastolic dysfunction. This complex of abnormalities is known as hypertensive heart disease and eventually leads to heart failure. Structural lesions underlying th...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章,评审
doi：10.1097/00005344-199800003-00003
更新日期：1998-01-01 00:00:00
abstract：:To determine whether the pattern of alcohol consumption, intake, and withdrawal modulates the incidence of malignant ventricular arrhythmias and sudden cardiac death due to beta-adrenergic stimulation in a species susceptible to administration of isoproterenol alone, a regimen was formulated in which both continuous a...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：10.1097/00005344-198810000-00015
更新日期：1988-10-01 00:00:00
abstract：:Intravenous (i.v.) administration of bromocriptine (150 micrograms/kg) in conscious normotensive rats with chronic spinal cord transection (at T5-T7), pretreated or not with i.v. propranolol (0.5 mg/kg), induced significant decreases in mean arterial blood pressure (MAP) which were greater and longer lasting than thos...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：
更新日期：1992-05-01 00:00:00
abstract：:The effect of olmesartan medoxomil (OLM), an angiotensin II receptor blocker (ARB), on advanced nephropathy and mortality was evaluated in Zucker Diabetic Fatty (ZDF) rats, a type 2 diabetes model. OLM was administered from 36 weeks of age, when the animals developed advanced proteinuria. OLM effectively suppressed th...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：10.1097/01.fjc.0000245241.79959.d6
更新日期：2006-10-01 00:00:00
abstract：:In helical strips of dog cerebral, coronary, mesenteric, and renal arteries treated with ONO3708, an inhibitor of vasoconstricting prostaglandin (PG) receptors, and previously contracted with serotonin, PGF2 alpha, PGD2 and epithio-methano thromboxane A2 (sTxA2), a TxA2 analog, caused a relaxation. The cerebral arteri...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：10.1097/00005344-198803000-00014
更新日期：1988-03-01 00:00:00
abstract：:Ketanserin, an S2 antagonist, has been shown to be an effective antihypertensive drug. Carefully controlled clinical trials have demonstrated that ketanserin is as effective as both metoprolol and thiaside diuretics in reducing blood pressure. However, unlike the beta-blocking drug metoprolol and the diuretics, the re...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章,评审
doi：
更新日期：1991-01-01 00:00:00
abstract：BACKGROUND:The goal of this study was to determine whether an Angiotensin II receptor antagonist, candesartan, prevents myocardial fibrosis more effectively than enalapril in animals with a non-ACE pathway during the progression of congestive heart failure (CHF). METHODS AND RESULTS:Dogs were randomly assigned to one ...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：10.1097/00005344-200406000-00016
更新日期：2004-06-01 00:00:00
abstract：:We have recently shown that endothelin-1 (ET-1) activates two types of Ca2+-permeable nonselective cation channels (designated NSCC-1 and NSCC-2) and store-operated Ca2+ channel (SOCC). These channels can be pharmacologically discriminated using 1-[beta-[3-(4-methoxyphenyl)propoxy]-4-methoxyphenethyl]-1-H-imidazoe l h...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：10.1097/00005344-200036051-00034
更新日期：2000-11-01 00:00:00
abstract：:We studied the effects of felodipine [4-(2,3-dichlorophenyl)-1,4-dihydropyridine-2,6-dimethyl 3,5-dicarboxylic 3-ethylester and 5-methylester] on the coronary vascular bed of pig hearts with an ischemic region in the left ventricle following ligation of the left anterior descending coronary artery. At an infusion rate...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：10.1097/00005344-198303000-00006
更新日期：1983-03-01 00:00:00
abstract：:Congestive heart failure is a leading cause of morbidity and mortality. Congestive heart failure is marked by atrial and ventricular enlargements and reduced cardiac contractility and an association with an increased incidence of atrial and ventricular arrhythmias and sudden cardiac death. Dysfunctional ion channel fu...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章,评审
doi：10.1097/FJC.0b013e3181a1b9c7
更新日期：2009-10-01 00:00:00
abstract：:The effect of nonpharmacological measures--diet (restriction to salt), weight reduction, stress avoidance, stopping smoking, and exercise--are analyzed after being applied to 145 hypertensive individuals (average age 60.3 years) using antihypertensive drugs for 6 months without nonpharmacological therapy. The initial ...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：
更新日期：1990-01-01 00:00:00
abstract：OBJECTIVE:To investigate whether upregulation of OX40-OX40 ligand (OX40L) system is related to stability of coronary atherosclerotic plaque in patients with coronary heart diseases. METHODS:Thirty normal controls and 250 patients, including 80 with stable angina (SA), 110 with unstable angina (UA), and 60 with acute m...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：10.1097/FJC.0b013e3181be7578
更新日期：2009-11-01 00:00:00
abstract：:This selective review of a few of the advances made in recent years indicates that we are entering a new era in cardiovascular pharmacology. Drugs with novel mechanisms of action, and modifications of existing drugs, are being developed in constantly increasing numbers. The clinical evaluation of these drugs will be a...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章,评审
doi：
更新日期：1984-01-01 00:00:00
abstract：:The present article reviews the experience with amiodarone therapy in life-threatening ventricular tachyarrhythmias. In 13 studies, 1,594 patients were treated with amiodarone in average doses of 300 mg/day. The mean annual death rate was 6.2%; the annual withdrawal rate averaged 8%. Risk factors for arrhythmia recurr...
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：:Acute ischemic left ventricular failure was induced in dogs by coronary embolization with plastic microspheres, resulting in reduced cardiac output (CO), increased left ventricular end-diastolic pressure (LVEDP), pulmonary capillary pressure (PCP), and total peripheral resistance (TPR). Intravenous (i.v.) administrati...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：10.1097/00005344-198907000-00018
更新日期：1989-07-01 00:00:00
abstract：:Trans-diclofurime has been shown to be a very potent class II calcium antagonist (see preceding report), and we have examined its molecular interactions with the different receptor sites at the Ca2+ channel. Trans-diclofurime did not affect [3H]nitrendipine binding to rat cortical membranes at 37 degrees C and showed ...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：10.1097/00005344-198704000-00012
更新日期：1987-04-01 00:00:00
abstract：:In strip preparations from the rabbit main pulmonary artery, it was not possible to differentiate convincingly between alpha 1- and alpha 2-adrenoceptors, when selective agonists such as methoxamine, St 587, B-HT 920, and clonidine, as well as selective antagonists such as prazosin and yohimbine were used for receptor...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：
更新日期：1986-01-01 00:00:00
abstract：:The effects of noradrenaline (NA, 10(-5) M) and [arginine8]vasopressin (AVP, 10(-7) M) on tension in Ca2+-free medium and on membrane potential, and the inhibition of NA- and AVP-induced contractions by isradipine, have been compared in mesenteric resistance vessels (MRVs) from Wistar-Kyoto (WKY) rats. The release of ...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：
更新日期：1988-01-01 00:00:00
abstract：:Experiments were designed to examine mechanisms of relaxations to nitric oxide (NO) in venous smooth muscle. Rings of canine femoral veins without endothelium were suspended for measurement of isometric force in organ chambers. Concentration-response curves to NO and 8-Br-cyclic guanosine monophosphate (cGMP) were obt...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：10.1097/00005344-199909000-00014
更新日期：1999-09-01 00:00:00
abstract：:Perturbations of the trans-sarcolemmal and sarcoplasmic Ca2+ transport contribute to the abnormal myocardial activity provoked by anoxia and reoxygenation. Whether Ca2+ pools of the extracellular compartment and sarcoplasmic reticulum (SR) are involved to the same extent in the dysfunction of the anoxic-reoxygenated i...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：10.1097/00005344-199802000-00004
更新日期：1998-02-01 00:00:00
abstract：:Increased levels of endothelin (ET) have been demonstrated in the ischemic brain, and ET receptor antagonism has been shown to improve outcome in cerebral ischemia. However, no previous work has been carried out evaluating the role of ET and its antagonism in brain trauma as compared to experimental stroke. In this st...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：10.1097/00005344-200036051-00104
更新日期：2000-11-01 00:00:00
abstract：:We have previously demonstrated that endothelin-1 (ET-1) is essential to the development of neural crest-derived craniofacial and cardiovascular structures. In this study we evaluated the intrauterine growth and development of the thyroid and thymus glands in Edn1-/- homozygous mice. Edn1-/- homozygous mice were small...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：
更新日期：1995-01-01 00:00:00
abstract：:Several mechanisms of action for Ca2+ antagonists are possible at the vascular muscle cell membrane and at subsequent steps. In rat caudal artery, nitrendipine hyperpolarizes the resting vascular muscle cell, an action different from that of verapamil. Hyperpolarization might be expected to explain the relaxant action...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：
更新日期：1984-01-01 00:00:00
abstract：:Cardiac hypertrophy causes heart failure and is associated with hyperglycemia in patients with diabetes mellitus. Mibefradil, which acts as a T-type calcium channel blocker, exerts beneficial effects in patients with heart failure. In this study, we explored the effects and mechanism of mibefradil on high-glucose-indu...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：10.1097/FJC.0000000000000844
更新日期：2020-08-01 00:00:00
abstract：:Interest in the cardiovascular protective effects of calcium channel antagonists has increased in the past decade. We investigated prevention of vascular wall remodeling by the long-acting calcium channel antagonist pranidipine in 12-week-old Dahl salt-sensitive (SS) rats with high-salt-induced (4% NaCl) hypertension....
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：10.1097/00005344-199406000-00016
更新日期：1994-06-01 00:00:00
abstract：:The new bradycardic agent UL-FS 49 (1,3,4,5-tetrahydro-7,8-dimethoxy-3-[3-[[2-(3,4-dimethoxyphenyl]ethyl] methylimino]propyl]-2H-3-benzazepin-2-on-hydrochloride) was investigated in isolated guinea pig atria. In spontaneously beating preparations UL-FS 49, (0.03 and 0.1 microgram/ml) reduced the rate of contraction an...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：
更新日期：1986-07-01 00:00:00
abstract：:Chronic rapid right ventricular pacing (RRVP) at 250 beats/min produces low cardiac output (CO) heart failure, marked reduction in total vascular capacitance, and a shift in volume centrally. The effect of converting enzyme inhibition with captopril on cardiac preload was investigated in this model of heart failure. E...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：10.1097/00005344-199409000-00002
更新日期：1994-09-01 00:00:00
abstract：:Calcium is a signaling element of general importance to cells. In muscle, its key function is the activation of troponin C, which is essential for the contraction of myofibrils in skeletal and heart muscles, and of myosin light chain kinase, which is essential for the contraction of smooth muscles. Calcium modulates t...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章,评审
doi：
更新日期：1988-01-01 00:00:00
abstract：:The haemodynamic effects of three different methods of nitrate administration [intravenous (i.v.) isosorbide dinitrate (ISDN) and buccal and transdermal nitroglycerin (NTG)] were evaluated in 36 patients with acute left ventricular failure due to a recent myocardial infarction. Similar reductions in pulmonary artery o...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：10.1097/00005344-198911000-00012
更新日期：1989-11-01 00:00:00
abstract：:Although the importance of adenosine (Ado)-receptor activation in preconditioning (PC) has been established, it is unclear whether cardioprotection afforded by PC is determined by the Ado level during PC ischemia or by that during sustained ischemia. Accordingly, we tested whether the PC effect is modified by augmenti...
journal_title：Journal of cardiovascular pharmacology
pub_type： 杂志文章
doi：10.1097/00005344-199801000-00001
更新日期：1998-01-01 00:00:00
