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Results 301 - 350 of 2804
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Redfors Björn - - 2013
Stress-induced cardiomyopathy (SIC), also known as Takotsubo cardiomyopathy, is characterized by severe but potentially reversible regional left ventricular wall motion abnormalities, ie, akinesia, in the absence of explanatory angiographic evidence of a coronary occlusion. The typical pattern is that of an akinetic apex with preserved contractions in the base, but ...
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 ...
Courand Pierre-Yves Nd - - 2013
Flecainide is a class 1C antiarrhythmic drug especially used for the management of supraventricular arrhythmia. In overdose cases, flecainide can induce life treating ventricular arrhythmias and cardiogenic shock. We report the case of a 72-year-old woman admitted to our intensive care unit for a regular monomorphic wide complex tachycardia (QRS ...
Savergnini Sílvia Q - - 2013
CGEN-856S is a novel Mas agonist. Herein, we examined the effects of this peptide on isoproterenol (ISO)-induced cardiac remodeling and myocardial infarction (MI) injury. We also sought to determine whether CGEN-856S activates the underlying mechanisms related to Mas receptor activation. Heart hypertrophy and fibrosis were induced by ISO (2 mg·kg·day) ...
Rubenstein Jason C - - 2013
Peri-infarct border zone (BZ) as quantified by late gadolinium enhancement (LGE) on cardiac magnetic resonance imaging (MRI) has been proposed as a risk stratification tool, and is associated with increased mortality. BZ has been measured by various methods in the literature. We assessed which BZ analysis best predicts inducible arrhythmia ...
Konishi Masaaki - - 2013
Cardiac troponin is a specific biomarker for cardiomyocyte necrosis in acute coronary syndromes. Troponin release from the coronary circulation remains to be determined because of the lower sensitivity of the conventional assay. We sought to determine basal and angina-induced troponin release using a highly sensitive troponin assay. The cardiac troponin ...
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 ...
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 ...
Guensch Dominik P - - 2013
Carbon dioxide (CO(2)) is a recognized vasodilator of myocardial blood vessels that leads to changes in myocardial oxygenation through the recruitment of the coronary flow reserve. Yet, it is unknown whether changes of carbon dioxide induced by breathing maneuvers can be used to modify coronary blood flow and thus myocardial ...
Pham Linh - - 2013
Hyponatremia secondary to the syndrome of inappropriate antidiuretic hormone secretion (SIADH) during amiodarone therapy is a rare but potentially lethal adverse effect. We report a case of severe hyponatremia associated with amiodarone, and discuss its clinical implications. An 84-year-old Caucasian man with a past medical history of hypertension and diabetes ...
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 ...
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 ...
Kawasaki Yusuke - - 2013
We present a case of syncope caused by coronary artery spasm without chest pain leading to ventricular fibrillation despite of vasodilator therapy with a calcium channel blocker (CCB). A 68-year-old man presented with two episodes of syncope without chest pain. Ergonovine provocation test induced a diffuse spasm in the right ...
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 ...
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 ...
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 ...
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 ...
Ogawa Kiyohiro - - 2013
Left ventricular (LV) remodeling and activation of sympathetic nervous system (SNS) are cardinal features of heart failure. We previously demonstrated that enhanced central sympathetic outflow is associated with brain toll-like receptor 4 (TLR4) probably mediated by brain angiotensin II type 1 receptor in mice with myocardial infarction (MI)-induced heart failure. ...
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 ...
Sivagnanam Kamesh - - 2013
Patient: Male, 27 Final Diagnosis: Bath salt induced cardiomyopathy Symptoms: Agitation • fever • pedal edema Medication: Intravenous nor-epinephrine for less than 6 hours Clinical Procedure: - Specialty: Internal medicine • cardiology. Unusual clinical course. "Bath salts" is the street name for a group of recently identified and increasingly abused ...
Xie Feng - - 2013
Ultrasound induced cavitation has been explored as a method of dissolving intravascular and microvascular thrombi in acute myocardial infarction. The purpose of this study was to determine the type of cavitation required for success, and whether longer pulse duration therapeutic impulses (sustaining the duration of cavitation) could restore both microvascular ...
Springall Rashidi - - 2013
Acute coronary syndromes (ACS) may be triggered by acute infections. Systemic production of interferon gamma (IFN-γ) is induced during infection and regulates the production of matrix metalloproteinases (MMPs) and their inhibitors (TIMPs), both important in plaque stability. This study evaluates the effect of IFN-γ on the MMPs/TIMP-1 ratio in cultured ...
Zhou Peng - - 2013
The present study was to test the hypothesis that anti-arrhythmic properties of verapamil may be accompanied by preserving connexin43 (Cx43) protein via calcium influx inhibition. In an in vivo study, myocardial ischemic arrhythmia was induced by occlusion of the left anterior descending (LAD) coronary artery for 45 min in Sprague-Dawley ...
Carboni Gian Piero - - 2013
It is well known that nitrates can induce paradoxical myocardial ischemia. Fifty patients (median age 73 years; range 67 to 78 years; 80% male) with healed myocardial infarcts were selected. All patients underwent resting single-photon emission computed tomography (SPECT) and resting baseline gated-SPECT using sestamibi or thallium-201 after the sublingual ...
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 ...
Tkaczewski Konrad - - 2013
Coronary angiography and measurement of fractional flow reserve (FFR) are used for anatomical and functional assessment of coronary stenoses. The achievement of maximal coronary hyperaemia is crucial for an accurate calculation of FFR. Although adenosine and papaverine have been well validated, their mechanisms of action as well as methods of ...
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 ...
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 ...
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 ...
Pachel Christina - - 2013
Tumor necrosis factor-like weak inducer of apoptosis (TWEAK) and its receptor fibroblast growth factor-inducible 14 (Fn14) are upregulated after myocardial infarction (MI) in both humans and mice. They modulate inflammation and the extracellular matrix, and could therefore be important for healing and remodeling after MI. However, the function of TWEAK ...
Kajimoto Masaki - - 2013
Extracorporeal membrane oxygenation (ECMO) unloads the heart, providing a bridge to recovery in children after myocardial stunning. ECMO also induces stress which can adversely affect the ability to reload or wean the heart from the circuit. Metabolic impairments induced by altered loading and/or stress conditions may impact weaning. However, cardiac ...
Messner Barbara B Cardiac Surgery Research Laboratory, Department of Surgery, Medical University of Vienna, Vienna, - - 2013
Insufficient angiogenesis and arteriogenesis in cardiac tissue after myocardial infarction (MI) is a significant factor hampering the functional recovery of the heart. To overcome this problem we screened for compounds capable of stimulating angiogenesis, and herein investigate the most active molecule, 5-Methoxyleoligin (5ML), in detail. 5ML potently stimulated endothelial tube ...
Orbay Hakan H Department of Radiology, University of Wisconsin - Madison WI, - - 2013
Biological changes following myocardial infarction (MI) lead to increased secretion of angiogenic factors that subsequently stimulate the formation of new blood vessels as a compensatory mechanism to reverse ischemia. The goal of this study was to assess the role of CD105 expression during MI-induced angiogenesis by positron emission tomography (PET) ...
Santoro Alessandro A 0000-0003-2311-3350 Cardioangiology with CCU, Department of Clinical and Experimental Medicine, Federico II University Hospital, 80131 Naples, - - 2013
In a 61-year-old woman with well controlled arterial hypertension, hypercholesterolemia, and smoke and suffering from recurrent angina pectoris despite angiographically normal epicardial coronary vessels and maximal therapy, the replacement of nitrates with novel antiangina drug ranolazine, after 6-month therapy, induced a complete relief of angina and a relevant rising of ...
Ruisi Michael M 0000-0001-6465-0967 Beth Israel Medical Center, Albert Einstein College of Medicine, New York, NY, - - 2013
Prinzmetal angina or vasospastic angina is a clinical phenomenon that is often transient and self-resolving. Clinically it is associated with ST elevations on the electrocardiogram, and initially it may be difficult to differentiate from an acute myocardial infarction. The vasospasm induced in this setting occurs in normal or mildly to ...
Srivastav Ritesh Kumar RK Department of Pharmacology, Faculty of Pharmacy Integral University, Lucknow (U.P), - - 2013
Objective: The study was conducted to evaluate cardioprotective effect of silk cocoon (Abresham) Bombyx mori (B. mori) on isoprenaline-induced myocardial infarction. This study deals with the cocoons, which is called Abresham in the Unani system of medicine. It is one of the 64 drugs which Avicenna has mentioned in Avicenna's ...
Doods Henri - - 2013
The aim of the present study was to investigate the effects of sabiporide, a potent and selective NHE1 inhibitor, on myocardial ischemia-induced arrhythmias and myocardial infarction and the possible pathways related to the cardioprotection afforded by sabiporide treatment. Anesthetized rats were subjected to myocardial ischemia via left main coronary artery ...
Philips Binu - - 2012
BACKGROUND: -Exercise related ventricular tachycardia (VT) and high burden of premature ventricular contractions (PVCs) are common in arrhythmogenic right ventricular dysplasia/cardiomyopathy (ARVD/C). We hypothesized that VT in ARVD/C shows a high degree of association with the PVC at baseline. METHODS AND RESULTS: -The study population included 16 consecutive ARVD/C patients ...
Rubio-Gayosso Ivan - - 2012
The role of testosterone in cardiovascular (CV) homeostasis is in controversy, and the exact effects of testosterone on the cardiovascular system remain poorly understood. Testosterone is metabolized by aromatase into 17β-estradiol and by 5α-reductase into dihydrotestosterone (DHT). Thus, identification of these metabolites in the heart may help to explain the ...
Chen Jiqiu J Cardiovascular Research Center, Mount Sinai School of Medicine, New York, NY 10029, - - 2013
This study investigates the impact of pressure overload on vascular changes after myocardial infarction (MI) in rats. To evaluate the effect of pressure overload, MI was induced in three groups: 1) left coronary artery ligation for 1 mo (MI-1m), 2) ischemia 30 min/reperfusion for 1 mo (I/R-1m), and 3) ischemia-reperfusion ...
Armoundas Antonis A - - 2012
BACKGROUND: Repolarization alternans (RA), a pattern of ventricular repolarization which repeats on an every other beat basis, has been closely linked with the substrate associated with ventricular tachycardia/ventricular fibrillation (VT/VF). OBJECTIVE: To evaluate a novel method to suppress RA. METHODS: We have developed a novel method to dynamically (upon R-wave ...
Gul Enes Elvin - - 2012
We report the case of a 14-year-old boy patient admitted to our outpatient clinic with palpitations and documented supraventricular tachycardia. Electrophysiological study and ablation were planned. In the electrophysiological study, two tachycardias with different cycle lengths and morphologies were induced. After elimination of the slow pathway, left posterior accessory pathway ...
Jiang Tiechao - - 2012
A water-soluble polysaccharide, named as SCPW, was extracted and fractioned from the fruits of Schisandra chinensis by DEAE-cellulose anion exchange and a Sepharose CL-6B column chromatography. The monosaccharide composition of SCPW determined by gas chromatography (GC) was identified that it was composed of arabinose, xylose, glucose and galactose with a ...
Stanely Mainzen Prince P - - 2012
Cardiac mitochondrial damage plays an important role in the pathology of myocardial infarction. The protective effects of (-) epicatechin on cardiac mitochondrial damage in isoproterenol induced myocardial infarction were evaluated in rats. Rats were pretreated with (-) epicatechin (20mg/kg body weight) daily for a period of 21days. After the pretreatment ...
Sosunov Eugene A - - 2013
The pH (low) insertion peptide (pHLIP) family enables targeting of cells in tissues with low extracellular pH. Here, we show that ischemic myocardium is targeted, potentially opening a new route to diagnosis and therapy. The experiments were performed using two murine ischemia models: regional ischemia induced by coronary artery occlusion ...
Koch Sheryl E SE Division of Cardiovascular Diseases, Department of Internal Medicine, University of Cincinnati, Cincinnati, OH, - - 2013
The current therapeutic options for acute decompensated heart failure are limited to afterload reducers and positive inotropes. The latter increases myocardial contractility through changes in myocyte calcium (Ca²⁺) handling (mostly through stimulation of the β-adrenergic pathways [β-ADR]) and is associated with paradoxical effects of arrhythmias, cell death, and subsequently increased ...
Skyschally Andreas - - 2012
AimsReperfusion injury following acute myocardial infarction impacts not only on the myocardium but also on the coronary microcirculation, and microembolization from the culprit lesion contributes to microvascular obstruction. Prior experimental studies have not accounted for microembolization in ischaemia/reperfusion injury and not considered microembolization as a confounder and target of protection ...
Hiller Nicole - - 2012
BACKGROUND:Mechanisms of local anesthetic cardiac toxicity are still not completely understood. In this study, we analyzed whether concentrations of local anesthetics found in clinical toxicity affect myocardial mitochondrial structure and oxygen consumption.METHODS:Guinea pig isolated heart Langendorff preparations were exposed to bupivacaine (3.0 and 7.5 μg/mL) and ropivacaine (3.6 and 9.0 ...
Wang Xiaohui X Department of Surgery, James H. Quillen College of Medicine, East Tennessee State University, Campus Box 70575, Johnson City, TN 37614-0575, - - 2013
We have reported that either toll-like receptor 4 deficiency (TLR4(-/-)) or TLR2 modulation protects against myocardial ischaemia/reperfusion (I/R) injury. The mechanisms involve attenuation of I/R-induced nuclear factor KappaB (NF-κB) activation. MicroRNA-146a (miR-146a) has been reported to target interleukin-1 receptor-associated kinase 1 (IRAK1) and tumor necrosis factor (TNF) receptor associated factor ...
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