Abstract:
:BACKGROUND: Conventional microelectrode techniques were used to compare the concentration-dependent effects of vesnarinone (0.1-100 µM) and amrinone (1 µM-1 mM) on action potential duration (APD) and developed force in both isolated dog ventricular trabeculae and Purkinje strands. METHODS AND RESULTS: Both drugs increased contractility of trabecular muscle preparations, while, in Purkinje strands, vesnarinone failed to increase developed force during continuous pacing at 2 Hz. Vesnarinone lengthened APD in both preparations; although this effect was more marked in Purkinje strands. Ventricular muscle APD was not affected by amrinone (1 µM to 1 mM), while, in Purkinje strands, amrinone produced a biphasic effect on APD. Low concentrations (1-100 µM) of amrinone shortened Purkinje fiber APD, while only the highest concentration (1 mM) used lengthened APD. In addition, in Purkinje strand preparations the effects of vesnarinone (10 µM) on APD and developed force were proportional to pacing cycle length at frequencies slower than 2 Hz; however, at frequencies faster than 2 Hz vesnarinone decreased developed force while APD was lengthened. In ventricular trabecular muscle preparations, the effects of vesnarinone were not affected by frequency. CONCLUSIONS: These results indicate clear differences between the effects of vesnarinone and amrinone in isolated cardiac preparations. These differences in experimental effects in isolated cardiac preparations may help provide an explanation for the disappointing clinical response of patients in heart failure to amrinone, while vesnarinone has appeared to be beneficial.
journal_name
J Cardiovasc Pharmacol Therjournal_title
Journal of cardiovascular pharmacology and therapeuticsauthors
Lathrop DA,Nánási PP,Varró A,Schwartz Adoi
10.1177/107424849600100207keywords:
subject
Has Abstractpub_date
1996-04-01 00:00:00pages
133-140issue
2eissn
1074-2484issn
1940-4034pii
S1074248496000156journal_volume
1pub_type
杂志文章abstract::Cardio-Oncology has blossomed as a new field in cardiovascular medicine, in large part due to new therapies, which may have cardiovascular sequelae. Despite this, anthracyclines still serve as cornerstone therapy for most pediatric cancers, several solid tumors and hematological malignancies. Cardiotoxicity is the mai...
journal_title:Journal of cardiovascular pharmacology and therapeutics
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更新日期:2021-03-01 00:00:00
abstract::Dronedarone is a new antiarrhythmic drug for patients with nonpermanent atrial fibrillation (AF). A relatively consistent finding in all trials studying dronedarone was a moderate but significant elevation of serum creatinine. Since dronedarone competes for the same organic cation transporter in the distal renal tubul...
journal_title:Journal of cardiovascular pharmacology and therapeutics
pub_type: 杂志文章
doi:10.1177/1074248412453873
更新日期:2013-03-01 00:00:00
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journal_title:Journal of cardiovascular pharmacology and therapeutics
pub_type: 杂志文章
doi:10.1177/107424849800300403
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abstract::BACKGROUND: The effectiveness of antisense oligodeoxynucleotides for in vitro and in vivo studies is limited by a low efficiency of cellular uptake and instability due to degradation by nucleases. To overcome some of these problems, we recently developed a transfer method that utilizes inactivated Sendai virus (hemagg...
journal_title:Journal of cardiovascular pharmacology and therapeutics
pub_type: 杂志文章
doi:10.1177/107424849700200308
更新日期:1997-07-01 00:00:00
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journal_title:Journal of cardiovascular pharmacology and therapeutics
pub_type: 杂志文章
doi:10.1177/1074248416663647
更新日期:2017-03-01 00:00:00
abstract::Cardiovascular diseases are one of the most common causes of death in humans and are responsible for billions of dollars in health care expenditures. As the molecular basis of cardiac diseases continues to be explored, there remains the hope for identification of more effective therapeutics. MicroRNAs (miRNAs) are rec...
journal_title:Journal of cardiovascular pharmacology and therapeutics
pub_type: 杂志文章,评审
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更新日期:2015-03-01 00:00:00
abstract:BACKGROUND:Omapatrilat has potent enzymatic inhibitory effects on the angiotensin-converting enzyme and neutral endopeptidase. The prolonged effects of this inhibition on systemic and regional hemodynamics, cardiovascular mass, and hydroxyproline concentration in spontaneously hypertensive rats were studied. The contri...
journal_title:Journal of cardiovascular pharmacology and therapeutics
pub_type: 杂志文章
doi:10.1177/107424840300800210
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journal_title:Journal of cardiovascular pharmacology and therapeutics
pub_type: 杂志文章
doi:10.1177/1074248420982736
更新日期:2020-12-17 00:00:00
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journal_title:Journal of cardiovascular pharmacology and therapeutics
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doi:10.1177/107424849800300205
更新日期:1998-04-01 00:00:00
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journal_title:Journal of cardiovascular pharmacology and therapeutics
pub_type: 杂志文章
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更新日期:2006-03-01 00:00:00
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journal_title:Journal of cardiovascular pharmacology and therapeutics
pub_type: 杂志文章
doi:10.1177/1074248420941672
更新日期:2021-01-01 00:00:00
abstract:BACKGROUND:Intimal hyperplasia following percutaneous interventional vascular procedures is a major cause of restenosis. Although heparin inhibits intimal hyperplasia, it has not proven clinically useful in part due to an inadequate duration of intramural drug residence. This study was designed to evaluate the efficacy...
journal_title:Journal of cardiovascular pharmacology and therapeutics
pub_type: 杂志文章
doi:10.1177/107424840100600407
更新日期:2001-10-01 00:00:00
abstract::Prior studies have suggested that intravenous diltiazem reduces the probability of spontaneous conversion of atrial fibrillation (AF) to sinus rhythm in the electrophysiology laboratory and in patients with postoperative AF. Whether diltiazem exerts the same effect in patients presenting to the emergency department (E...
journal_title:Journal of cardiovascular pharmacology and therapeutics
pub_type: 杂志文章,随机对照试验
doi:10.1177/1074248407303792
更新日期:2007-09-01 00:00:00
abstract:INTRODUCTION:Limited data exist comparing the efficacy and safety of bumetanide- or metolazone-based diuretic regimens to furosemide in acute heart failure (HF). Our purpose was to evaluate the comparative effect on urine output (UO) and renal function between these regimens. METHODS:A retrospective study of hospitali...
journal_title:Journal of cardiovascular pharmacology and therapeutics
pub_type: 杂志文章
doi:10.1177/1074248413482755
更新日期:2013-07-01 00:00:00
abstract::BACKGROUND: The electrophysiologic mechanisms of the persistence of atrial fibrillation (AF) after its initiation are not well understood. Therefore, the electrophysiologic characteristics of the right atrium were evaluated in an acute, pacing-induced model of AF in the pig in order to identify parameters associated w...
journal_title:Journal of cardiovascular pharmacology and therapeutics
pub_type: 杂志文章
doi:10.1177/107424849900400206
更新日期:1999-04-01 00:00:00
abstract::We evaluated whether carotenoid astaxanthin (ASX) could prevent oxidative and atherosclerotic damage in rabbits. Rabbits received regular chow (control) or an atherogenic diet (1% cholesterol) alone or supplemented with 50, 100, and 500 mg% ASX for 60 days (n = 5-9 per group). The atherogenic diet increased the serum ...
journal_title:Journal of cardiovascular pharmacology and therapeutics
pub_type: 杂志文章
doi:10.1177/1074248409350136
更新日期:2009-12-01 00:00:00
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journal_title:Journal of cardiovascular pharmacology and therapeutics
pub_type: 杂志文章,评审
doi:10.1177/1074248415571456
更新日期:2015-07-01 00:00:00
abstract::BACKGROUND: In recent years, there has been an increasing use of antiarrhythmic drugs that act predominantly by prolonging myocardial repolarization. An inevitable electrophysiologic consequence of these drugs is the development of torsade de pointes as a proarrhythmic reaction. Both intravenous lidocaine and magnesiu...
journal_title:Journal of cardiovascular pharmacology and therapeutics
pub_type: 杂志文章
doi:10.1177/107424849700200206
更新日期:1997-04-01 00:00:00
abstract:BACKGROUND:Patients with coronary artery disease (CAD) should be treated with statins to attain very low cholesterol levels, in order to reduce cardiovascular adverse events. More than 70% of these patients do not reach the appropriate cholesterol goal despite moderate statin doses. However, it is not known whether the...
journal_title:Journal of cardiovascular pharmacology and therapeutics
pub_type: 杂志文章,随机对照试验
doi:10.1177/1074248413489771
更新日期:2013-09-01 00:00:00
abstract::The antiarrhythmic potential of postconditioning in in vivo models remains poorly defined. We compared the effects of pre- and postconditioning on ventricular arrhythmogenesis against controls with and without reperfusion. Wistar rats (n = 40, 269 ± 3 g) subjected to ischemia (30 minutes)--reperfusion (24 hours) were ...
journal_title:Journal of cardiovascular pharmacology and therapeutics
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journal_title:Journal of cardiovascular pharmacology and therapeutics
pub_type: 杂志文章
doi:10.1177/107424849600100109
更新日期:1996-01-01 00:00:00
abstract::Platelets are key mediators in the pathophysiology of atherothrombotic disease. Inappropriate platelet activation can lead to thrombosis and ischemic events. Platelet function testing has been used to monitor patient response to antiplatelet therapy. Variability in response to antiplatelet therapy may be due in part t...
journal_title:Journal of cardiovascular pharmacology and therapeutics
pub_type: 杂志文章,评审
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更新日期:2009-09-01 00:00:00
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journal_title:Journal of cardiovascular pharmacology and therapeutics
pub_type: 临床试验,杂志文章
doi:10.1177/107424840100600205
更新日期:2001-04-01 00:00:00
abstract::Atrial fibrillation has recently come into clinical and research focus. In particular, ventricular rate control has been carefully compared with atrial rhythm control. Additionally, the recent discovery of atrial stunning has initiated clinical and research interest in atrial remodeling. Atrial fibrillation is more li...
journal_title:Journal of cardiovascular pharmacology and therapeutics
pub_type: 杂志文章,评审
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更新日期:2003-06-01 00:00:00
abstract:BACKGROUND:In recent decades, clinical trials have played an increasingly important role in determining how we practice. Trial results proving that a clinical finding poses risk have led to interventions that try to reduce risk. Clinical trials proving that a particular therapy provides better outcome than another ther...
journal_title:Journal of cardiovascular pharmacology and therapeutics
pub_type: 杂志文章
doi:10.1177/107424840000500103
更新日期:2000-01-01 00:00:00
abstract:INTRODUCTION:Recent evidence suggests that transcriptional reprogramming is involved in the pathogenesis of cardiac remodeling (cardiomyocyte hypertrophy and fibrosis) and the development of heart failure. 5-Azacytidine (5aza), an inhibitor of DNA methylation approved for hematological malignancies, has previously demo...
journal_title:Journal of cardiovascular pharmacology and therapeutics
pub_type: 杂志文章
doi:10.1177/1074248420979235
更新日期:2020-12-02 00:00:00
abstract:BACKGROUND:Limited data are available on the clinical management of atrial fibrillation (AF) and its outcomes from an Australian perspective. OBJECTIVE:To describe the appropriateness of antithrombotic prescribing for patients who presented with a diagnosis of AF to the Hawkesbury St John of God Hospital, New South Wa...
journal_title:Journal of cardiovascular pharmacology and therapeutics
pub_type: 杂志文章
doi:10.1177/1074248418786264
更新日期:2019-01-01 00:00:00
abstract::Congestive heart failure is a chronic and debilitating disease responsible for high cardiac morbidity and mortality in the world and is associated with more than 290 000 deaths in the United States each year. Recent advances in heart failure therapy target many of the mechanical and structural aspects of heart failure...
journal_title:Journal of cardiovascular pharmacology and therapeutics
pub_type: 杂志文章,评审
doi:10.1177/1074248410366447
更新日期:2010-06-01 00:00:00
abstract::The gap junction modifier Rotigaptide (ZP123), which promotes cellular coupling, was hypothesized to decrease defibrillation thresholds during prolonged ventricular fibrillation (VF). Thirty-two New Zealand white rabbits were randomized to receive saline (control, n = 16) or Rotigaptide (n = 16). Following 4 min of un...
journal_title:Journal of cardiovascular pharmacology and therapeutics
pub_type: 杂志文章
doi:10.1177/1074248406298021
更新日期:2007-03-01 00:00:00
abstract:AIMS:This study aims to evaluate atherosclerosis, oxidative stress, and arterial stiffness attenuation by simvastatin and ivabradine in hyperlipidemic rabbits. METHODS AND RESULTS:Forty rabbits were randomly divided into 4 groups: atherogenic diet (group C), atherogenic diet plus simvastatin (group S), atherogenic die...
journal_title:Journal of cardiovascular pharmacology and therapeutics
pub_type: 杂志文章
doi:10.1177/1074248415617289
更新日期:2016-07-01 00:00:00