Search Results
Results 1 - 50 of 1493
1 2 3 4 5 6 7 8 9 10 >
Zhou Heng - - 2012
Stem cell antigen (Sca) 1, a glycosyl phosphatidylinositol-anchored protein localized to lipid rafts, is upregulated in the heart during myocardial infarction and renovascular hypertension-induced cardiac hypertrophy. It has been suggested that Sca-1 plays an important role in myocardial infarction. To investigate the role of Sca-1 in cardiac hypertrophy, we performed ...
Lass Thomas - - 2012
OBJECTIVES: Detailed information about the dynamic geometry of the left ventricular outflow tract (LVOT) is of great importance for transcatheter aortic valve implantation (TAVI), since these valves utilize the LVOT as a landing zone for optimum placement and fixation. The LVOT is generally considered circular in shape and stable in ...
Lee Sang Hyuk - - 2012
A hypertrophied muscle band (HMB) in the left ventricle (LV), which can be misinterpreted as apical hypertrophic cardiomyopathy, is a rare echocardiographic finding in a patient with normal LV wall thickness. Not only are symptoms produced, but changes in the electrocardiogram (ECG) are limited to the repolarization phase and show ...
Anter Elad - - 2012
Idiopathic VF Originating from the Moderator Band. We report a case of a 59-year-old man with idiopathic ventricular fibrillation storm. Ventricular fibrillation was pause-dependent and triggered by an early-coupled right ventricular premature complex. The characteristic premature beat was mapped and successfully ablated from Purkinje fibers of the moderator band. (J ...
Kinoshita Takeshi - - 2012
Myocardial protection aims to prevent reversible post-ischemic cardiac dysfunction (myocardial stunning) and irreversible myocardial cell death (myocardial infarction) that occur as a consequence of myocardial ischemia and/or ischemic-reperfusion injury. Although the mortality rate for isolated coronary artery bypass grafting has been markedly reduced during the past decade, myocardial death, as ...
Yang Chun C Mathematical Sciences Department, Worcester Polytechnic Institute, Worcester, Mass 01609, - - 2013
Patients with repaired tetralogy of Fallot account for most cases of late-onset right ventricle failure. The current surgical approach, which includes pulmonary valve replacement/insertion, has yielded mixed results. A new surgical option of placing an elastic band in the right ventricle is proposed to improve right ventricular cardiac function as ...
Gill Richdeep S - - 2012
Morbid obesity remains a potential relative contraindication for cardiac transplantation. Hence, a select population of morbidly obese patients with end-stage heart failure may require a ventricular assist device (VAD) as a bridge to transplantation to afford them time to lose sufficient weight and thus decrease there mortality rate after transplantation. ...
Katoh Shungo - - 2012
Classic takotsubo cardiomyopathy (TCM) is characterized by transient dysfunction of the apical portion of the left ventricle with hyperkinesis of the other parts of the heart wall. Recently, wall motion abnormalities in parts other than in the apical portion of the heart have been reported. Inverted TCM is one form ...
Andersen Nancy M - - 2012
Clinical and experimental studies have traditionally focused on understanding the mechanisms for why a heart fails. We hypothesize that the pathways involved with myocardial recovery are not simply the reverse of those that cause heart failure. However, determining when and how a decompensated heart can recover remains unknown. Male C57BL/6 ...
Lu Minjie - - 2012
The purpose of this study was to track and investigate the effects of autologous bone marrow-derived mesenchymal stem cells (MSCs) transplantation after acute myocardial infarction in swine assessed by magnetic resonance imaging (MRI). Twenty-four Chinese mini-pigs (27±3 kg) were divided into 4 groups, including control groups (groups 1 and 3) ...
Gautam Mani Prasad - - 2012
An adolescent presented with insidious onset and gradually progressive distension of abdomen associated with bilateral ankle swelling of few months duration. He had one episode of prolonged low-grade self-limiting febrile illness during childhood but had not consulted to doctor and never had been diagnosed as case of tuberculosis or acute ...
Bjørnstad Johannes L - - 2011
Aim:  Myocardial remodelling during pressure overload might contribute to development of heart failure. Reverse remodelling normally occurs following aortic valve replacement for aortic stenosis, however, the details and regulatory mechanisms of reverse remodelling remain unknown. Thus, an experimental model of reverse remodelling would allow for studies of this process. Although ...
Zhang Shuning - - 2011
Optimal timing of cell therapy for myocardial infarction (MI) appears during 5 to 14 days after the infarction. However, the potential mechanism requires further investigation. This work aimed to verify the hypothesis that myocardial stiffness within a propitious time frame might provide a most beneficial physical condition for cell lineage ...
Chen Jiqiu - - 2011
Current rodent models of ischemia/infarct or pressure-volume overload are not fully representative of human heart failure. We developed a new model of congestive heart failure (CHF) with both ischemic and stress injuries combined with fibrosis in the remote myocardium. Sprague-Dawley male rats were used. Ascending aortic banding (Ab) was performed ...
Zuo Shi - - 2012
Our previous studies have suggested that transduction of Wnt11 directly increases bone marrow-derived mesenchymal stem cells (MSCs) differentiation into cardiac phenotypes. In this study, we investigated whether Wnt11 enhances MSC-mediated cardioprotection via paracrine fashion after acute ischemia. MSCs were harvested from male rat bone marrow and transduced with Wnt11 (MSC(Wnt11)). ...
Poynter Jeffrey A - - 2011
BACKGROUND: Signal transducer and activator of transcription 3 (STAT3) regulates myocardial apoptosis, cellular proliferation, and the immune response after ischemia/reperfusion (I/R). STAT3 is also necessary for the production of vascular endothelial growth factor (VEGF) by mesenchymal stem cells (MSCs), which are known to reduce myocardial injury after I/R. However, it ...
Lee Tetsumin - - 2011
This study examined morphological characteristics of echo-attenuated plaques by optical coherence tomography (OCT) and evaluated their influence on creatine kinase-myocardial band (CK-MB) elevation after percutaneous coronary intervention (PCI) in patients with elective stent implantation. Recent intravascular ultrasound studies have described atherosclerotic plaques with echo attenuation (EA) without associated bright echoes ...
Tang J S - - 2011
Eight phenolic compounds, including (-)-epicatechin (1) and seven proanthocyanidins (2-8), were obtained from the butanol extract of Parabarium huaitingii (PHB). Their chemical structures were identified based on analyses of mass spectra (MS), NMR, CD spectra, and partial acid catalyzed thiolytic degradation. The observation made by laser scanning confocal microscope found ...
Chun Kook Jin - - 2011
OBJECTIVE: The purpose of this study was to investigate the effects of various remifentanil strategies (preconditioning, postconditioning, or continuous infusion) against myocardial ischemia-reperfusion injury. DESIGN: An in vitro experimental study using the Langendorff system. SETTING: A university research laboratory. PARTICIPANTS: Male Sprague-Dawley rats (each n = 9). INTERVENTIONS: Five different ...
Sundararaman S - - 2011
We previously demonstrated that transient stromal cell-derived factor-1 alpha (SDF-1) improved cardiac function when delivered via cell therapy in ischemic cardiomyopathy at a time remote from acute myocardial infarction (MI) rats. We hypothesized that non-viral gene transfer of naked plasmid DNA-expressing hSDF-1 could similarly improve cardiac function. To optimize plasmid ...
Carlsson Marcus - - 2011
Abstract Objectives. To investigate whether coronary microemboli have long-term effects on left ventricular (LV) function in an experimental model. Furthermore, to determine if first-pass perfusion and late gadolinium enhancement (LGE) patterns differs between small- and large-sized microemboli. Design. Six pigs underwent left anterior descending (LAD)-coronary microembolization with small-sized (40-120 μm, ...
Avitabile Daniele - - 2011
Nucleolar stress, characterized by loss of nucleolar integrity, has not been described in the cardiac context. In addition to ribosome biogenesis, nucleoli are critical for control of cell proliferation and stress responses. Our group previously demonstrated induction of the nucleolar protein nucleostemin (NS) in response to cardiac pathological insult. NS ...
Dębiński Marcin - - 2011
Reperfusion injury (RI) remains an important limitation of myocardial revascularization. The aim of the present study was to evaluate the influence of the intracoronary injection of adiponectin on RI and cardiomyocyte death in a porcine myocardial infarction model. Acute infarction in 14 Polish domestic pigs was induced by inflation of ...
Jabbour Andrew - - 2011
BACKGROUND.: Donor hearts are subjected to ischemia-reperfusion injury during transplantation. Recombinant human neuregulin (rhNRG)-1 peptide attenuates myocardial injury in various animal models of cardiomyopathy. Supplementing the organ-storage solution, Celsior (C), with glyceryl trinitrate (GTN) and cariporide improves cardiac preservation after hypothermic storage. We hypothesized that the addition of rhNRG-1 to ...
Birnbaum Yochai - - 2011
Pioglitazone (PIO), a PPAR-γ agonist, limits myocardial infarct size by activating Akt and upregulating cytosolic phospholipase A(2) (cPLA(2)) and cyclooxygenase (COX)-2. However, PIO has several PPAR-γ-independent effects. We assessed whether PIO limits myocardial infarct size in PPAR-γ-knockout mice, attenuates hypoxia-reoxygenation injury and upregulates P-Akt, cPLA(2), and COX-2 expression in PPAR-γ-knockout ...
Hwang Hyosook - - 2011
The purpose of this study was to investigate a potential benefit of simultaneous administration of multiple soluble factors (SFs) in the repair of chronically infarcted rat myocardium. Rats subjected to a permanent coronary artery occlusion (myocardial infarction) received a cocktail of SF or a phosphate buffer. Four SFs, fibroblast growth ...
Dokken B B - - 2011
Glucagon-like peptide-1 (GLP-1) is an incretin that has glucoregulatory effects as well as protective effects in a variety of tissues, including the heart. We hypothesized that GLP-1 may have a direct effect on neutrophils (PMNs) after myocardial ischemia, to ameliorate reperfusion injury. Deeply anesthetized Sprague-Dawley rats underwent 30 min of ...
Porrello Enzo R - - 2011
Certain fish and amphibians retain a robust capacity for cardiac regeneration throughout life, but the same is not true of the adult mammalian heart. Whether the capacity for cardiac regeneration is absent in mammals or whether it exists and is switched off early after birth has been unclear. We found ...
Iwasaki Mitsuo - - 2011
Objective: Interventions to preserve myocardial function after brain death may increase the donor pool for heart transplantation. The present study using a brain death model of rats was designed to examine the protective potential of nicorandil, an adenosine triphosphate-sensitive potassium channel opener, on myocardial function after brain death. Methods: Rats ...
Marques João Silva - - 2011
Transthoracic echocardiography is the modality of choice for the bedside diagnosis of acute myocardial infarction mechanical complications. We report the case of a ventricular septal rupture occurring soon after inferior myocardial infarction, revascularized by primary angioplasty. This challenging diagnosis was elucidated by 3D-echocardiography as 2D-imaging was not conclusive. This case ...
Carreras Francesc - - 2011
Cardiac magnetic resonance imaging (Cardiac MRI) has become a gold standard diagnostic technique for the assessment of cardiac mechanics, allowing the non-invasive calculation of left ventricular long axis longitudinal shortening (LVLS) and absolute myocardial torsion (AMT) between basal and apical left ventricular slices, a movement directly related to the helicoidal ...
Sorrentino Sajoscha A - - 2011
The aim of this study was to investigate whether nebivolol has added effects on left ventricular (LV) dysfunction and remodeling early after myocardial infarction (MI) beyond its β(1)-receptor-blocking properties. Nebivolol is a third-generation selective β(1)-adrenoreceptor antagonist that stimulates endothelial cell nitric oxide (NO) production and prevents vascular reduced nicotinamide adenine ...
Wang Ying-Li - - 2011
This study was designed to investigate the effect of cardiac lymphatic obstruction on plasma nitric oxide (NO) and left ventricular function. The plasma NO was measured in study group (n=21) and control group rabbits (n=12) before, and 3, 7, 14, 30 and 90 days after the obstruction of cardiac lymphatic ...
Sato Takatoshi - - 2011
Few reports have examined the effects of adult bone marrow multipotent stromal cells (MSCs) on large animals, and no useful method has been established for MSC implantation. In this study, we investigate the effects of MSC infusion from the coronary vein in a swine model of chronic myocardial infarction (MI). ...
Caimmi Philippe Primo - - 2011
Objective: Levosimendan has been reported to exert cardioprotection. In this study, we have examined the cardiac effects of different doses of intracoronary levosimendan on ischemia/reperfusion injuries, and the involvement of K(ATP) channels and nitric oxide (NO). Methods: The experiments were performed in a total of 56 anesthetized pigs. In 21 ...
Abulaiti Alimujiang - - 2011
Electrical stimulation of the rostal cerebellar fastigial nucleus (FNS) has been proved to have neuroprotective effects, but it is not known whether FNS also has a cardioprotective effect. One hundred Sprague-Dawley rats were randomly allocated into four groups, including a sham-operation group (Sham group), rats whose coronary arteries were ligated ...
Urbieta-Caceres Victor H - - 2011
Hypertension (HTN) may lead to left ventricular hypertrophy and vascular dysfunction, which are independent factors for adverse cardiovascular outcomes. We hypothesized that decreased blood pressure by percutaneous transluminal renal angioplasty (PTRA) would improve the function and architecture of coronary microvessels, in association with decreased inflammation and fibrosis. Three groups of ...
Khan Mahmood - - 2011
Stem-cell transplantation to treat acute myocardial infarction (MI) is gaining importance as a minimally invasive and potent therapy to replace akinetic scar tissue by viable myocardium. Our recent studies have shown that stem-cell transplantation marginally improvesmyocardial oxygenation in the infarct tissue leading to improvement in cardiac function. The aim of ...
Kosiński A - - 2011
The morphology of myocardial bridges (MB) in the heart of the domestic pig remain an open issue. Despite numerous analyses of the subject, many controversies still exist. Opinions also differ when the influence of the MB on haemodynamic processes in the coronal vessel system is concerned. In the examined group ...
Bogaard M D - - 2011
A 55-year-old woman with dilated cardiomyopathy and rate-dependent left bundle branch block had a cardiac resynchronisation therapy (CRT) device implanted. During implantation, the maximum rate of left ventricular pressure rise (dP/dt(max)) was measured invasively. This case presents a description of the acute negative effect of a left bundle branch block ...
Sorensen Mette - - 2011
Valvular aortic stenosis is the most common cause of left ventricular hypertrophy due to gradually increasing pressure work. As the stenosis develop the left ventricular hypertrophy may lead to congestive heart failure, increased risk of perioperative complications and also increased risk of sudden death. A functional porcine model imitating the ...
Engström Karin S - - 2011
The n-3 polyunsaturated fatty acids eicosapentaenoic acid and docosahexaenoic acid, which are present in fish, are protective against myocardial infarction. However, fish also contains methylmercury, which influences the risk of myocardial infarction, possibly by generating oxidative stress. Methylmercury is metabolized by conjugation to glutathione, which facilitates elimination. Glutathione is also ...
Zeng Wu-Tao - - 2010
Aims: We evaluated effects of the nonpeptide angiotensin (ANG)-(1-7) analog AVE 0991 (AVE) on cardiac function and remodeling as well as transforming growth factor-beta1 (TGF-β1)/tumor necrosis factor-alpha (TNF-α) expression in myocardial infarction rat models. Methods and Results: Sprague-Dawley rats underwent either sham surgery or coronary ligation. They were divided into ...
Loukili Noureddine - - 2011
High-mobility group box 1 (HMGB1) is a nuclear protein actively secreted by immune cells and passively released by necrotic cells that initiates pro-inflammatory signalling through binding to the receptor for advance glycation end-products. HMGB1 has been established as a key inflammatory mediator during myocardial infarction, but the proximal mechanisms responsible ...
Shioura Krystyna M - - 2011
Contractile dysfunction is common to many forms of cardiovascular disease. Approaches directed at enhancing cardiac contractility at the level of the myofilaments during heart failure (HF) may provide a means to improve overall cardiovascular function. We are interested in gender-based differences in cardiac function and the effect of sarcomere activation ...
Nawata Kan - - 2010
A 35-year-old patient in whom a Toyobo left ventricular assist device (LVAD) was implanted with descending aortic perfusion for the treatment of critical heart failure due to global myocardial infarction after repeat aortic root operations with a mechanical aortic valve developed complete thrombotic occlusion of the ascending aorta. This phenomenon ...
Ueland T - - 2010
OBJECTIVE: Matrix Gla protein (MGP) is a calcification inhibitor and alterations in circulating MGP have been observed in different populations characterized by vascular calcification. We hypothesized that patients with calcific valvular aortic stenosis (AS) would have dysregulated circulating MGP levels. DESIGN AND SUBJECTS: We examined plasma levels of nonphosphorylated carboxylated ...
Lake Mikhailia - - 2010
An 80-year-old woman was referred for transcatheter aortic valve implantation for correction of aortic stenosis. An echocardiogram at the author's institution revealed severe hypertrophy of the left ventricle with deep recesses into the myocardium and hypokinesis involving the left ventricular apex. In addition, there was subaortic stenosis secondary to a ...
Zhao Ying - - 2011
This study aimed to assess the early effect of trans-catheter aortic valve implantation (TAVI) on right (RV) and left ventricular (LV) function in severe aortic stenosis (AS) patients. Twenty AS patients (age 79±6 years) were examined before, one week and six weeks after TAVI using Doppler echocardiography. LV ejection fraction ...
Rosso Rosamaria - - 2010
Thalassaemia is an inherited hemoglobin disorder resulting in chronic hemolytic anemia. Organ damage caused by iron overload represents the major cause of illness and the heart complications secondary to extensive myocardial iron overload are the leading cause of mortality. These patients are generally not considered as candidates for heart transplantation. ...
1 2 3 4 5 6 7 8 9 10 >