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Rifki Oktay F OF Department of Internal Medicine, Cardiology, University of Texas Southwestern Medical Center, Dallas, TX, - - 2013
Recent work has demonstrated that autophagy, a phylogenetically conserved, lysosome-mediated pathway of protein degradation, is a key participant in pathological cardiac remodeling. One common feature of cell growth and autophagy is membrane biogenesis and processing. The exocyst, an octomeric protein complex involved in vesicle trafficking, is implicated in numerous cellular ...
Yagishita-Tagawa Yoshimi - - 2013
AIMS: The effects of inotropic agents on left ventricular (LV) synchrony in heart failure patients are still unknown. The purpose of this study was to investigate the effects of dobutamine on LV mechanical dyssynchrony and LV systolic performance in patients with dilated cardiomyopathy (DCM) and a narrow QRS using real-time ...
Jacob Sony - - 2013
Calsequestrin-2 (CSQ2) is a resident glycoprotein of junctional sarcoplasmic reticulum that functions in the regulation of SR Ca2+ release. CSQ2 is biosynthesized in rough ER around cardiomyocyte nuclei and then traffics transversely across SR subcompartments. During biosynthesis, CSQ2 undergoes N-linked glycosylation and phosphorylation by protein kinase CK2. In mammalian heart, ...
Stanely Mainzen Prince Ponnian - - 2013
The preventive effects of (-) epicatechin on oxidative stress, cardiac mitochondrial damage, altered membrane bound adenosine triphosphatases and minerals were reported previously in isoproterenol induced myocardial infarction model. Leakage of lysosomal glycohydrolases and cathepsins play an important role in the pathology of myocardial infarction. This study was aimed to evaluate ...
Penumetsa Srikanth C SC Department of Cardiology, Baystate Medical Center, TUFTS University, Springfield, MA, - - 2013
Heart failure has been reported as a rare side effect of bevacizumab, a chemotherapeutic agent, used in the treatment of breast cancer. However, reversible left ventricular systolic dysfunction with a pattern similar to stress-induced cardiomyopathy has not been reported. The etiopathogenesis of stress-induced cardiomyopathy is poorly understood. Given this uncertainty, ...
Guven Bagla Aysel - - 2013
The cardioprotective effects of two different doses of erythropoietin administration were analyzed in rats with experimental myocardial infarction. None, saline, standard-dose (5000Ukg-1) and high-dose (10,000Ukg-1) of human recombinant erythropoietin alpha were administered intraperitoneally in Wistar rats with myocardial infarction induced by coronary artery ligation. Infarct sizes measured after triphenyltetrazolium chloride ...
Meyer Markus - - 2013
We sought to evaluate the safety and efficacy of N-acetylcysteine (NAC) on ischemia and reperfusion in a pig model focusing on cardio-renal protection. High doses of NAC may provide protection from contrast induced nephropathy (CIN). NAC has also been demonstrated to reduce myocardial infarction size and improve left ventricular function ...
Jiang Wei W Department of Psychiatry & Behavioral Sciences, Duke University Medical Center, Durham, North Carolina 27710, USA. - - 2013
The goal of this study was to evaluate the prevalence and clinical characteristics of mental stress-induced myocardial ischemia. Mental stress-induced myocardial ischemia is prevalent and a risk factor for poor prognosis in patients with coronary heart disease, but past studies mainly studied patients with exercise-induced myocardial ischemia. Eligible patients with ...
Kuhl Thomas - - 2013
The combination of heparin-induced thrombocytopenia (HIT) II, left ventricular failure with extracorporeal membrane oxygenation (ECMO) therapy, and recurrent left ventricular thrombosis is rare and predicts a poor outcome. In this case, HIT II occurred after an ischemic cardiogenic shock. We initiated ECMO and intra-aortic balloon pump therapy during coronary artery ...
Noriega Francisco J - - 2013
BACKGROUND: Reciprocal ST segment depression simulating additional subendocardial ischemia is commonly observed in ST segment elevation myocardial infarction. OBJECTIVE: We aimed to study the mechanism and characterization of the whole reciprocal ECG patterns induced by acute coronary artery occlusion at different locations in the absence of additional subendocardial ischemia in ...
Kandadi Machender R - - 2013
This study was designed to evaluate the role of ULK1 in AMPK-mediated myocardial autophagy and contractile dysfunction following acute alcohol challenge. Wild-type and AMPK knockout mice were challenged with ethanol (3 g/kg/d, i.p.) for 3 days. Myocardial function was evaluated using echocardiography and edge-detection. Western blot analysis was employed to ...
Xu Mao-Chun - - 2013
To investigate the cardioprotective effects of salidroside on myocardial ischemia-reperfusion injury (IRI) in rabbits and the underlying action mechanisms in PI3K/Akt signaling pathway, a rabbit ischemia/reperfusion model was created by ligating the left anterior descending coronary arterial branch for 30 min and by releasing the ligature to allow reperfusion for 120 min. ...
Umezawa Rei - - 2013
We evaluated radiation-induced myocardial damage using iodine-123 β-methyl-iodophenyl pentadecanoic acid (I-123 BMIPP) scintigraphy. Between May 2010 and April 2011 we performed I-123 BMIPP scintigraphy for patients who had maintained complete response to curative radiotherapy (RT) for esophageal cancer for more than six months. We compared the area of the myocardium ...
MornoĊŸ Cristian - - 2013
Anthracyclines are important anticancer drugs, but their use is limited by cardiotoxicity. Left ventricular ejection fraction (LVEF) is often inadequate to detect myocardial disease induced by chemotherapy. Tissue Doppler and bidimensional-strain imaging could detect LV myocardial dysfunction earlier than LVEF. In drug-induced cardiotoxicity, torsional and longitudinal LV deformations [LV twist ...
Ng Fu Siong - - 2013
BACKGROUND: Heart rates during ischaemia and reperfusion are possible determinants of reperfusion arrhythmias. We used ivabradine, a selective I(f) current inhibitor, to assess the effects of heart rate reduction (HRR) during ischaemia-reperfusion on reperfusion ventricular arrhythmias and assessed potential anti-arrhythmic mechanisms by optical mapping. METHODS: Five groups of rat hearts ...
Barold S Serge - - 2013
This report describes a form of group beating induced by a St Jude dual chamber ICD which interpreted a ventricular escape rhythm (with retrograde conduction) as premature ventricular complexes (PVC). These pacemaker-defined PVCs activated the atrial pace-PVC algorithm in 2 steps. 1. The postventricular atrial refractory period (PVARP) was terminated ...
Kido Tomoyuki - - 2013
Background: Adenosine triphosphate (ATP) induces relative hypoperfusion in significantly stenotic coronary arteries, but its effect on myocardial strain has not been used clinically for the detection of ischemia. The purpose of this study was to quantify ATP-stress-induced contractile impairment as altered myocardial strain in coronary artery disease (CAD) using tagged magnetic ...
Chou Chung-Chuan - - 2013
BACKGROUND: The effects of SEA0400, a Na(+) /Ca(2+) exchanger (NCX) blocker, on dynamic factors and arrhythmogenic alternans in 1-month myocardial infarction (MI) hearts remain unknown. METHODS: Simultaneous voltage and intracellular Ca(2+) (Ca(i) ) optical mapping was performed in 12 rabbit hearts with MI for 1 month and six normal rabbit ...
Cunnington Colin - - 2013
Epinephrine-induced myocardial ischemia in the setting of anaphylaxis is a rare event and is postulated to be due to coronary artery spasm. We report the case of a 43-year-old woman who presented to the emergency department with an anaphylactic reaction triggered by flucloxacillin. She was treated with intramuscular epinephrine, following ...
Dursunoglu Dursun - - 2013
Glycoprotein IIb/IIIa inhibitors are used in the acute coronary syndromes and percutaneous coronary intervention as antiplatelet agents. However, these agents induce thrombocytopenia in approximately 1% to 5% of patients, and may lead to bleeding complications. Abciximab is associated with higher incidence of thrombocytopenia than eptifibatide and tirofiban. We describe a ...
Ebelt Henning - - 2013
ABSTRACT: Various strategies have been devised to reduce the clinical consequences of myocardial infarction including acute medical care, revascularization, stem cell transplantations and, more recently, prevention of cardiomyocyte cell death. Activation of embryonic signaling pathways is a particularly interesting option to complement these strategies and to improve the functional performance ...
Schmittinger Christian A - - 2013
ABSTRACT: Myocardial depression in septic shock is well-known but its pathophysiological genesis is incompletely understood. To assess the incidence and extent of stress-induced histologic myocardial alterations in septic shock a prospective, observational, clinical and post-mortem study was conducted and twenty patients dying from septic shock were included. Exclusion criteria were ...
Palaniyappan Ariv A Cardiovascular Research Group, University of Alberta, Edmonton, - - 2013
While secretory-leukocyte-protease-inhibitor (SLPI) may promote skin wound healing, its role in infarct healing after reperfused myocardial infarction (RMI) remains unclear. Short-term intravenous angiotensin II (AngII) receptor blocker therapy with candesartan (CN) attenuates increased SLPI and markers of early matrix/left ventricular (LV) in acute RMI. To determine whether reducing effects of ...
Cheng Richard K - - 2013
BACKGROUND: Hodgkin's lymphoma (HL) comprises of 4% of malignancies diagnosed in children from birth to 14 years of age. While overall survival rates have increased, HL survivors can be at risk of late cardiovascular complications from radiotherapy. HL survivors with a history of mediastinal RT have been found to have ...
Nicholson Chad K CK Department of Surgery, Division of Cardiothoracic Surgery, Carlyle Fraser Heart Center, Emory University School of Medicine, 550 Peachtree St NE, Atlanta, GA 30308, - - 2013
The aim of this study was to determine whether thioredoxin 1 (Trx1) mediates the cardioprotective effects of hydrogen sulfide (H2S) in a model of ischemic-induced heart failure (HF). Mice with a cardiac-specific overexpression of a dominant negative mutant of Trx1 and wild-type littermates were subjected to ischemic-induced HF. Treatment with ...
Zhang Bingfang B Department of Geriatrics, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, People's Republic of - - 2013
ER stress triggers myocardial contractile dysfunction while effective therapeutic regimen is still lacking. Mitochondrial aldehyde dehydrogenase (ALDH2), an essential mitochondrial enzyme governing mitochondrial and cardiac function, displays distinct beneficial effect on the heart. This study was designed to evaluate the effect of ALDH2 on ER stress-induced cardiac anomalies and the ...
Smith Sakima A - - 2013
Stress cardiomyopathy, also known as takotsubo cardiomyopathy, is a rapidly reversible form of acute heart failure classically triggered by stressful events. It is associated with a distinctive left ventricular contraction pattern described as apical akinesis/ballooning with hyperdynamic contraction of the basal segments in the absence of obstructive coronary artery disease. ...
Wang Ye - - 2013
Cardiac sympathetic hyperinnervation after myocardial infarction (MI) is associated with a high incidence of lethal arrhythmia. However, the mechanisms of nerve sprouting induced by MI are unclear. In this study, we showed a nuclear factor-κB (NF-κB) signaling pathway involved in cardiac sympathetic hyperinnervation after MI in rabbit hearts. An MI ...
Rodriguez-Angulo H - - 2013
Chagas' myocardiopathy, caused by the intracellular protozoan Trypanosoma cruzi, is characterized by microvascular alterations, heart failure and arrhythmias. Ischemia and arrythmogenesis have been attributed to proteins shed by the parasite, although this has not been fully demonstrated. The aim of the present investigation was to study the effect of substances ...
Fineschi Massimo - - 2013
Takotsubo cardiomyopathy is a clinical disorder characterized by a transient dilatation and akynesis or dyskinesis of the left ventricular (LV) apex, mimicking an anterior wall acute myocardial infarction in the absence of significant coronary artery disease (CAD). It typically occurs during an episode of severe emotional or physical stress. Recent ...
Osadchii Oleg E - - 2013
Quinidine is a class Ia Na(+) channel blocker that prolongs cardiac repolarization owing to the inhibition of IKr, the rapid component of the delayed rectifier current. Although quinidine may induce proarrhythmia, the contributing mechanisms remain incompletely understood. This study examined whether quinidine may set proarrhythmic substrate by inducing spatiotemporal abnormalities ...
Kataria Vikas - - 2013
BACKGROUND: Idiopathic left ventricular tachycardia (ILVT) is a common form of VT in structurally normal heart. Different methods have been proposed for radiofrequency ablation (RFA) of ILVT that have good short term results but recurrence is higher. Termination of tachycardia during RFA and/or non-induciblity have been the procedural endpoints. We ...
Leong-Sit Peter - - 2013
 INTRODUCTION: Prior reports demonstrate prognostic value in noninducibility of atrial arrhythmias after atrial fibrillation (AF) ablation and suggest their utility in guiding additional ablation lesion sets. The type and mechanism of induced atrial arrhythmias, their relationship to the underlying atrial substrate, and prognostic significance of induced organized atrial a'rrhythmias are ...
Merlet Nolwenn - - 2013
The toxicity of doxorubicin, leading to an irreversible heart failure, limits its use as chemotherapeutic agent. The beneficial effects of early administration of β-blocker were reported in patients with heart failure due to doxorubicin, suggesting an important role of β-adrenoceptors (β-ARs). This study aimed to identify a putative target (β-AR ...
Russell Leslie - - 2013
The classic finding of Takotsubo's cardiomyopathy is left ventricular systolic dysfunction with echocardiographic evidence of apical ballooning in the absence of significant coronary disease. Intracranial hemorrhage is a known cause for stress-induced cardiomyopathy with a similar echocardiographic presentation. This diagnostic finding suggests a similar pathophysiologic mechanism between neurogenic cardiac damage ...
Mainali Naba Raj - - 2013
Recurrent Takotsubo cardiomyopathy is a relatively uncommon condition seen in patients with severe physical or emotional stress. We report a case of a 51-year-old woman who had recurrent Takotsubo cardiomyopathy with involvement of apical left ventricular (LV) segments, induced by intense emotional stress. On two occasions she presented with symptoms ...
Milano Giuseppina - - 2013
Exposure to intermittent hypoxia (IH) may enhance cardiac function and protects heart against ischemia-reperfusion (I/R) injury. To elucidate the underlying mechanisms, we developed a cardioprotective IH model that was characterized at hemodynamic, biochemical and molecular levels. Mice were exposed to 4 daily IH cycles (each composed of 2-min at 6-8% ...
Kusumoto Saburo - - 2013
A 31-year-old woman with primary mediastinal large B-cell lymphoma refractory to conventional chemotherapy was treated with high-dose chemotherapy containing cyclophosphamide (CY). Subsequently, she was treated with auto peripheral blood stem cell transplantation. Although a complete remission was obtained, heart failure developed two months later. Echocardiography showed an impaired systolic function ...
Lin Xiaojie - - 2013
Transient middle cerebral artery occlusion (tMCAO) model is widely used to mimic human focal ischemic stroke in order to study ischemia/reperfusion brain injury in rodents. In tMCAO model, intraluminal suture technique is widely used to achieve ischemia and reperfusion. However, variation of infarct volume in this model often requires large ...
Liu Yong - - 2013
Hyperuricemia is a risk factor for contrast-induced acute kidney injury in patients with chronic kidney disease. This study evaluated the value of hyperuricemia for predicting the risk of contrast-induced acute kidney injury in patients with relatively normal serum creatinine who were undergoing percutaneous coronary interventions. A total of 788 patients ...
Chen Taibo - - 2013
Ventricular premature complexes (VPCs) are commonly encountered in patients with congestive heart failure (CHF). Frequent ventricular ectopy can be associated with deterioration of cardiac function and may lead to VPC-induced cardiomyopathy. VPC-induced inter- and/or intraventricular dyssynchrony has been postulated as the main mechanism underlying VPC-induced left ventricular dysfunction. For risk ...
Chachques Juan Carlos - - 2013
Cardiomyopathy induces geometric alteration of the ventricular cavity, which changes from a natural elliptical (conical) to a spherical shape. Ventricular chamber dilatation and spherical deformation are important causes of morbidity and mortality among patients with congestive heart failure. In addition, diastolic dysfunction is an important clinical problem in these cases ...
Katayama Yoichi - - 2013
Takotsubo cardiomyopathy is known to be triggered by some stress. We report the first case of Takotsubo cardiomyopathy induced by hypothermia and diabetic ketoacidosis (DKA). A 59-year-old woman was brought to our emergency department. Upon examination, she was found to be lethargic and disoriented. The body temperature was 30.9°C, blood ...
Farinetti Alberto - - 2013
The aim of the study was to evaluate the surgical approach to intramyocardial (i.m.) injection of Bone Marrow Stem Cells (BMSCs) in a pre-clinical model and its complications. In New Zealand rabbits an ischemia reperfusion injury lasting 20 min was induced by temporary ligation of anterior descending coronary artery during ...
Kai Zhang - - 2013
Glucagon-like peptide-1 and its receptor agonist-exendin-4 (Ex-4) have been shown to provide beneficial effects for cardiovascular diseases. This study investigated the effects of Ex-4 on ischemia-induced ventricular arrhythmias in rats. Anesthetized male rats were once treated with Ex-4 (5 μg/kg, i.v.) 1 h before ischemia in the absence and/or presence ...
Li Xiaoping - - 2013
Recent studies have demonstrated that myocardial calpain triggers caspase-3 activation and myocardial apoptosis in models of sepsis, whereas the inhibition of calpain activity down-regulates myocardial caspase-3 activation and apoptosis. However, the mechanism underlying this pathological process is unclear. Therefore, in this study, our aim was to explore whether the Hsp90/Akt ...
Gao Erhe - - 2013
Coronary artery ligation to induce myocardial infarction (MI) and ischemia/reperfusion (I/R) injury in mice is typically performed by an invasive and time-consuming approach that requires ventilation and a full thoracotomy (classical method), often resulting in extensive tissue damage and high mortality. Here, we describe a novel and rapid surgical method ...
Ribeiro Rogerio Faustino RF - - 2013
Carvedilol has beneficial effects on cardiac function in patients with heart failure but its effect on ovariectomy-induced myocardial contractile dysfunction remains unclear. Estrogen deficiency induces myocardial contractile dysfunction and increases cardiovascular disease risk in postmenopausal women. Our aim was to investigate whether carvedilol, a beta receptor blocker, would prevent ovariectomy-induced ...
Shao Yangzhen - - 2013
Myocardial infarction (MI) is one of the most important causes of mortality in humans(1-3). In order to improve morbidity and mortality in patients with MI we need better knowledge about pathophysiology of myocardial ischemia. This knowledge may be valuable to define new therapeutic targets for innovative cardiovascular therapies(4). Experimental MI ...
Zhu Jie-Ning - - 2013
Carvedilol, a nonselective β-adrenoreceptor antagonist, protects against myocardial injury induced by acute myocardium infarction (AMI). The mechanisms underlying the anti-fibrotic effects of carvedilol are unknown. Recent studies have revealed the critical role of microRNAs (miRNAs) in a variety of cardiovascular diseases. This study investigated whether miR-29b is involved in the ...
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