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Results 451 - 500 of 2074
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Amelio D - - 2012
The Frank-Starling Law is a fundamental property of the vertebrate myocardium which allows, when the end-diastolic volume increases, that the consequent stretch of the myocardial fibers generates a more forceful contraction. It has been shown that in the eel (Anguilla anguilla) heart, Nitric Oxide (NO) exerts a direct myocardial relaxant ...
Biscaglia S - - 2012
Calling on prior experience with patients affected by non-ST-segment elevation acute coronary syndromes, as well as from patients undergoing coronary stenting, clopidogrel, given as soon as possible at a loading dose of 300 or preferably 600 mg is recommended for patients with ST-segment elevation myocardial infarction undergoing mechanical treatment[1,2]. One ...
Liu Yu Y Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan 430060, - - 2014
Rotigaptide is a new anti-arrhythmic peptide, which has recently been found to increase junctional conductance and prevent ischemia-induced ventricular tachycardia. In this study, we attempted to investigate the effects and mechanisms of rotigaptide on the vulnerability to ventricular arrhythmias in rabbits with heart failure (HF). Chronic volume-pressure overload was used ...
Katritsis Demosthenes G - - 2012
BACKGROUND: Implantable cardioverter-defibrillators (ICD) are recommended for the primary prevention of sudden cardiac death in patients with left ventricular dysfunction but it is unclear whether treatment benefits are diminished in patients with very low baseline left ventricular ejection fraction (LVEF) (<25%) or increased in those with prolonged QRS duration (>120 ...
Bonny Aimé - - 2012
We report three cases of sustained monomorphic ventricular tachycardia (VT) in the setting of coronary artery disease, resistant to beta-blockers in two patients and to amiodarone in all, successfully terminated by low doses of intravenous (IV) epinephrine. VT was the first manifestation of coronary artery disease in one patient, whereas ...
Frommeyer Gerrit - - 2012
AIMS: Ranolazine (RAN) was reported to be effective and safe in converting atrial fibrillation (AF) to sinus rhythm by administration of a single dose ('pill in the pocket') to patients with structural heart disease. This study examines the underlying mechanisms for the antiarrhythmic benefit of RAN application in chronic heart ...
Kleikers Pamela W M - - 2012
Ischemia/reperfusion injury (IRI) is crucial in the pathology of major cardiovascular diseases, such as stroke and myocardial infarction. Paradoxically, both the lack of oxygen during ischemia and the replenishment of oxygen during reperfusion can cause tissue injury. Clinical outcome is also determined by a third, post-reperfusion phase characterized by tissue ...
Idigo Winifred O WO Department of Cardiovascular Medicine, University of Oxford, John Radcliffe Hospital, Oxford OX3 9DU, United - - 2012
Myocardial constitutive No production depends on the activity of both endothelial and neuronal NOS (eNOS and nNOS, respectively). Stimulation of myocardial β(3)-adrenergic receptor (β(3)-AR) produces a negative inotropic effect that is dependent on eNOS. We evaluated whether nNOS also plays a role in β(3)-AR signaling and found that the β(3)-AR-mediated ...
Navaratnarajah Manoraj - - 2012
AIMS: Ivabradine (Iva) has shown beneficial structural and functional effects in clinical and experimental heart failure (HF), but its action in combination with mechanical unloading (MU), such as during treatment with left ventricular assist devices (LVAD), is unknown. The aim of this study was to investigate the effects of Iva ...
Hoffmayer Kurt S - - 2012
Atrioventricular junction ablation with permanent pacemaker insertion is a highly effective treatment approach in patients with atrial fibrillation that is resistant to other treatment modalities, especially in the elderly or those with severe comorbidities. This effect likely reflects reversal of rapid ventricular rates and regularizing ventricular rates. There is increasing ...
Tannen Richard - - 2012
PURPOSE: Examine feasibility of a new strategy to perform Electronic Medical Record database valid Comparative Effectiveness Research (CER), using determination of whether rosiglitazone (ROS) treatment increases Acute myocardial infarction (MI) in comparison to pioglitazone (PIO) as a model question. METHODS: Using the UK The Health Improvement Network Database, a retrospective ...
Demerouti Eftychia - - 2012
Gender seems to interfere with the cardioprotective effect of ischemic preconditioning (PreC) and postconditioning (PostC); PreC-conferred protection is weaker or lost in female animals after ovariectomy (Ov), while the role of PostC is still in dispute. We sought to investigate the effect of PostC in female rabbits, its interaction with ...
Gao Dengfeng - - 2012
In experimental models of acute myocardial infarction (AMI), erythropoietin (EPO) reduces infarct size and improves left ventricular (LV) function. However, in the clinical setting, the effect of EPO in AMI was unclear. We conducted a systematic review and meta-analysis of randomized controlled trials (RCTs) of EPO to explore the safety ...
Ebner Bernd - - 2012
Myocardial infarct size can be limited by pharmacological postconditioning (pPC) with cardioprotective agents. Cardioprotective effects of neuregulin-1β (NRG) via activation of protein kinase B (Akt) and downstream pathways like endothelial nitric oxide synthase (eNOS) have been postulated based on results from cell culture experiments. The purpose of this study was ...
Shibata Itsuko - - 2013
We assessed the effect of milrinone application timing after reperfusion against myocardial stunning as compared with levosimendan in swine. Furthermore, we examined the role of p38 mitogen-activated protein kinase (p38 MAPK) in the milrinone-induced cardioprotection. All swine were subjected to 12-minutes ischemia followed by 90-minutes reperfusion to generate stunned myocardium. ...
Daniels Christopher R CR Department of Biomedical Sciences, James H. Quillen College of Medicine, James H. Quillen Veterans Affairs Medical Center, East Tennessee State University, Johnson City, Tennessee, - - 2012
β-Adrenergic receptor (β-AR) stimulation increases extracellular ubiquitin (UB) levels, and extracellular UB inhibits β-AR-stimulated apoptosis in adult cardiac myocytes. This study investigates the role of exogenous UB in chronic β-AR-stimulated myocardial remodeling. l-Isoproterenol (ISO; 400 μg·kg(-1)·h(-1)) was infused in mice in the presence or absence of UB (1 μg·g(-1)·h(-1)). Left ...
Antonopoulos Alexios S - - 2012
BACKGROUND: Adiponectin is an adipokine with an important role in cardiovascular system conferring anti-inflammatory and anti-atherogenic effects. Two common single nucleotide polymorphisms (SNP) on adiponectin gene, rs2241766 and rs1501299, have been associated with insulin resistance and diabetes mellitus risk however their effects on cardiovascular risk remain unclear. We examined the ...
Porokhya M V - - 2012
We studied the effects of carbon monoxide and sodium hydrosulfide, hydrogen sulfide donor, on contractile activity of the left ventricle in Langendorf-perfused isolated rat heart. Carbon monoxide 5×10(-5) M significantly accelerated sinus rhythm and left-ventricular pressure wave growth and decay. To the contrary, negative inotropic and chronotropic effects were observed ...
Dinicolantonio James J - - 2012
Statins are a standard of care in many clinical settings such as acute myocardial infarction and for patients having or at risk of cardiovascular (CV) disease. This is based on a plethora of data showing reductions in CV events and mortality. The CV benefit of statins can be partly explained ...
Stark Christoffer - - 2012
Thymosin β4 (Tβ4) is a peptide known for its abilities to protect and facilitate regeneration in a number of tissues following injury. Its cardioprotective effects have been evaluated in different animal models and, currently, a clinical trial is being planned in patients suffering from acute myocardial infarction. This paper focuses ...
Mirzaiepour Fatemeh - - 2012
The effect of opium addiction on the appearance of different types of arrhythmias after acute myocardial infarction (AMI) has been assessed in few studies. This study is aimed to determine the effect of opium on post-MI arrhythmia and also to address the differences in the appearance of different types of ...
Ibanez Borja - - 2012
Infarct size predicts post-infarction mortality. Oral β-blockade within 24 hours of a ST-segment elevation acute myocardial infarction (STEMI) is a class-IA indication, however early intravenous (IV) β-blockers initiation is not encouraged. In recent magnetic resonance imaging (MRI)-based experimental studies, the β(1)-blocker metoprolol has been shown to reduce infarct size only ...
Benge Cassandra D - - 2012
The most common risk factors for heart failure are hypertension and myocardial infarction. Angiotensin receptor blockers (ARBs) attenuate the deleterious effects of angiotensin II. Valsartan is a once or twice daily ARB that is FDA-approved for hypertension, LV dysfunction post-myocardial infarction and congestive heart failure as both an adjunct in ...
Correale Michele - - 2012
Clinical trials demonstrated that statin therapy is associated with a significant reduction in cardiovascular morbidity and mortality when used for either primary or secondary prevention of cardiovascular events. Several studies have shown that statins, having an important effect in the prevention of acute coronary syndromes, are also able to prevent ...
Catanzariti Domenico - - 2012
AIMS: Right ventricular apical pacing (RVAP) may be deleterious, determining abnormal left ventricular (LV) electrical activation and progressive LV dysfunction. Permanent His-bundle pacing (HBP) has been proposed to prevent this detrimental effect. The aim of our study was to compare the long-term effects of HBP on LV synchrony and systolic ...
GÄ…siorowski Adam - - 2012
The article describes the impact of weight training, micro-elements and vitamins on rehabilitation in post-myocardial infarction patients. Cardiac rehabilitation is a multi-disciplinary and multi-faceted intervention aimed at restoring well-being and retarding disease progression in patients with heart disease. It has been shown that exercise-based cardiac rehabilitation is effective in reducing ...
Andre Lucas - - 2012
Aims: Heart failure (HF) is characterized by regionalized contractile alterations resulting in loss of the transmural contractile gradient across the left ventricular free wall. We tested whether a regional alteration in mitochondrial oxidative metabolism during HF could affect myofilament function through PKA signaling. Results: Twelve weeks after permanent left coronary ...
Maruyama Mitsunori M Krannert Institute of Cardiology and Division of Cardiology, Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana, - - 2013
Carvedilol and its analogues suppress delayed afterdepolarizations (DADs) and catecholaminergic polymorphic ventricular tachycardias by direct action on the cardiac ryanodine receptor type 2 (RyR2). To test a hypothesis that carvedilol analogue may also prevent triggered activities (TAs) through the suppression of early afterdepolarizations (EADs). Intracellular Ca(2+) and membrane voltage were ...
Yu Tao - - 2012
Statin, as a 3-hydroxy-3-methyl-glutaryl-CoA reductase inhibitor, has been shown to prevent atrial fibrillation (AF) due to its anti-inflammatory and antioxidant effects. However, it is still not known whether statin can improve autonomic remodeling to prevent AF. In the present study, using an in vivo rat myocardial infarction (MI) model, we ...
Vieira Ricardo D'Oliveira RD Department of Atherosclerosis, Heart Institute of the University of São Paulo, São Paulo, - - 2012
The Second Medicine, Angioplasty, or Surgery Study (MASS II) included patients with multivessel coronary artery disease and normal systolic ventricular function. Patients underwent coronary artery bypass graft surgery (CABG, n=203), percutaneous coronary intervention (PCI, n=205), or medical treatment alone (MT, n=203). This investigation compares the economic outcome at 5-year follow-up ...
Matschke K - - 2012
During extracorporeal circulation (ECC) controlled hypothermia is a common method of myocardial protection due to a reduction of the myocardial oxygen consumption. Although the beneficial aspects of hypothermia on the myocardial metabolism have been widely demonstrated the effect of hypothermia on the myocardial oxygen tension (PmyO2) is unclear. For this ...
Honold Joerg - - 2012
Background: Prognosis of patients with heart failure remains poor despite improved conventional and interventional treatment regimens. The improvement of neovascularisation and repair processes by administration of bone marrow-derived cells modestly improved the recovery after acute myocardial infarction. However, circulating patient-derived cells are reduced in number and function particularly in chronic ...
Adam Tasneem - - 2012
The effectiveness of ischemic preconditioning (IPC) to protect the heart against ischemia/reperfusion injury (IRI) declines with age. The deacetylase protein sirtuin 1 (Sirt 1) confers myriad functions including longevity and cardioprotection against IRI. As such, Sirt 1 may be a potential candidate to explain the protective effect of IPC. We ...
Varma Niraj - - 2012
Pacemaker implantation is necessary in patients with symptomatic bradycardia. The right ventricular (RV) apex is the traditional pacing site because of its ease of access with simple and reliable technology. However, by forcing mechanical desynchronization, this may induce adverse effects, especially in heart failure patients. To avoid these problems, alternative ...
Krylova I B - - 2012
Experiments on rats have shown that preventive treatment with uridine stabilizes energy metabolism in the heart under conditions of 60-min left coronary artery occlusion. The preparation also prevented antioxidant system dysfunction and LPO hyperactivation. 5-Hydroxydecanoate, a selective blocker of mitochondrial ATP-dependent K(+)-channels, abolished the protective effect of uridine, which attested ...
Brinster Derek R - - 2012
This manuscript describes the initial experience of 15 patients undergoing aortic arch replacement using a modification of the trifurcate arch technique described by Spielvogel and coworkers [1]. This technique provides continuous antegrade cerebral perfusion and minimal myocardial ischemia with mild hypothermia.
Güvenç Tolga Sinan - - 2012
Capecitabine is an orally available chemotherapeutic agent that is converted to 5-fluorouracil (5-FU) after absorbtion. Capecitabine and its active metabolite, 5-FU, have cardiotoxic effects with reported instances of acute coronary syndromes caused due to coronary vasospasm. However, these agents exert toxic effects on cardiovascular system and beyond vasospasm provacation. We ...
Zimmerman Janice L - - 2012
Cocaine, a natural alkaloid derived from the coca plant, is one of the most commonly abused illicit drugs. Cocaine is commonly abused by inhalation, nasal insufflation, and intravenous injection, resulting in many adverse effects that ensue from local anesthetic, vasoconstrictive, sympathomimetic, psychoactive, and prothrombotic mechanisms. Cocaine can affect all body ...
Frommeyer Gerrit - - 2012
BACKGROUND: Ranolazine exhibits a synergistic effect in combination with class III drugs to suppress atrial fibrillation. OBJECTIVE: To investigate whether a combination therapy affects repolarization and provokes ventricular tachyarrhythmias (VT) in a sensitive model of proarrhythmia. METHODS: Thirty-seven rabbits were assigned to 3 groups and fed with amiodarone (50 mg/kg/d; ...
Gu Yongwei - - 2012
Inflammation plays an important role in sympathetic remodeling after myocardial infarction (MI), and the inhibition of inflammation has therapeutic benefits that could alleviate the progression of sympathetic remodeling. Recent studies have indicated that the antimalarial agent artemisinin has the ability to inhibit inflammation. In this study, the inhibitory effects of ...
Monami Matteo - - 2012
AIMS: Preliminary data from randomized trials with metabolic outcomes have shown that treatment with dipeptidyl peptidase-4 inhibitors (DPP4i) could be associated with a reduced incidence of major cardiovascular events (MACE). The present meta-analysis is aimed at verifying this protective effect, collecting all available data from randomized trials. MATERIALS AND METHODS: ...
Riezzo Irene - - 2012
Cocaine is a powerful stimulant the sympathetic nervous system by inhibiting catecholamine reuptake, stimulating central sympathetic outflow, and increasing the sensitivity of adrenergic nerve endings to norepinephrine (NE). Numerous studies have established that cocaine has the ability to cause irreversible structural damage to the brain, heart, lung, liver, kidney and ...
Whitney Nathaniel L - - 2012
Object The authors describe a method of securing an external ventricular drain (EVD) to prevent dislodgement and discourage CSF leakage and infection. Methods The EVD is secured using a single permanent suture, creating a box stitch around the exit site attached to a modified roman sandal. Multiple knots are tied ...
Xing Quansheng - - 2012
We introduce a simple method to distinguish permanent from transient non-sinus rhythm immediately after resuscitation in cardiac operations. An ice slush of normal saline is sprayed on the surface of the right atrium around the sinus node. If the arrhythmia is transient, the heart usually regains sinus rhythm; if not, ...
Borghi Claudio - - 2012
Angiotensin-converting enzyme inhibitors are extensively used to improve clinical outcome of patients with several cardiovascular diseases. Zofenopril proved to be very effective in patients with coronary artery disease and myocardial infarction, thanks to its unique effective mechanism of action for improving blood pressure control, left ventricular function and myocardial ischemia ...
Alexopoulos Dimitrios - - 2012
Primary percutaneous coronary intervention, (pPCI), of native coronaries and saphenous vein grafts (SVGs), is the recommended reperfusion strategy for STEMI, and an early invasive approach is recommended for high risk patients with UA/NSTEMI. Although PCI effectively restores flow in the infarct related artery/culprit vessel in both situations, myocardial perfusion often ...
Hawkes Anna L - - 2012
BACKGROUND: Participation in coronary heart disease secondary prevention programs is low. Innovative programs to meet this treatment gap are required. PURPOSE: To aim of this study is to describe the effectiveness of a telephone-delivered secondary prevention program for myocardial infarction patients. METHODS: Four hundred and thirty adult myocardial infarction patients ...
Matsuura Yunosuke - - 2012
Aim: To understand the differences between histopathological characteristics related to PTX3 (pentraxin 3) and CRP (C-reactive protein) in coronary atherosclerotic plaques.Methods and Results: To assess the localization of PTX3 and CRP in coronary plaque, immunohistochemistry was performed using 157 coronary artery specimens from 45 autopsied cases. Overall, immunoreactivity to CRP ...
Zendaoui Adnane - - 2012
Aortic regurgitation (AR) is a disease for which there is currently no effective medical treatment. It has been shown previously in an experimental model of AR that the renin-angiotensin-aldosterone system (RAAS) plays a major role, and that medications blocking the RAAS are effective to protect against left ventricular (LV) hypertrophy ...
Wang Yves T - - 2012
Defibrillation shocks from implantable cardioverter defibrillators can be lifesaving but can also damage cardiac tissues via electroporation. This study characterizes the spatial distribution and extent of defibrillation shock-induced electroporation with and without a 45-min postshock period for cell membranes to recover. Langendorff-perfused rabbit hearts (n = 31) with and without ...
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