myocadial infarct

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OBJECTIVES: Myocardial injury assessment from delayed enhancement magnetic resonance images is routinely limited to global descriptors such as size and transmurality. Statistical tools from computational anatomy can drastically improve this characterization, and refine the assessment of therapeutic procedures aiming at infarct size reduction. Based on these techniques, we propose a new characterization of myocardial injury up to the pixel resolution. We demonstrate it on the imaging data from the Minimalist Immediate Mechanical Intervention randomized clinical trial (MIMI: NCT01360242), which aimed at comparing immediate and delayed stenting in acute ST-Elevation Myocardial Infarction (STEMI) patients...

Augmented levels of reactive isolevuglandins (IsoLGs) are responsible for cardiovascular diseases. The role of IsoLGs in myocardial infarction (MI) remains elusive. Here we explored the effect of IsoLGs scavenger 2-hydroxybenzylamine (2-HOBA) in post-infarction cardiac repair. We observed that infarcted cardiac tissues expressed high IsoLGs in mice. Following MI injury, 2-HOBA treated mice displayed decreased infarction area and improved heart function compared with the saline-treated group. Moreover, 2-HOBA effectively attenuated MI-induced cardiac remodeling, oxidative stress, apoptosis, and inflammation...

Myocardial infarction is a prevalent and life-threatening cardiovascular disease. The main goal of existing interventional therapies is to restore coronary reperfusion while few are designed to ameliorate the pathology of heart diseases via targeting the post-translational modifications of those critical proteins. Small ubiquitin-like modifier (SUMO) proteins are recently discovered to form a new type of protein post-translational modifications (PTM), known as SUMOylation. SUMOylation and deSUMOylation are dynamically balanced in the maintenance of various biological processes including cell division, DNA repair, epigenetic transcriptional regulation, and cellular metabolism...

BACKGROUND: Several myokines are produced by cardiac muscle. We investigated changes in myokine levels at the time of acute myocardial infarction (MI) and following reperfusion in relation to controls. METHODS: Patients with MI (MI Group, n=31) treated with percutaneous coronary intervention (PCI) were compared to patients with stable coronary artery disease (CAD) subjected to scheduled PCI (CAD Group, n=40) and controls with symptoms mimicking CAD without stenosis in angiography (Control Group, n=43)...

BACKGROUND: Studying T1- and T2-mapping for discrimination of acute from chronic myocardial infarction (AMI, CMI). METHODS: Eight patients with AMI underwent CMR at 3 T acutely and after >3 months. Imaging techniques included: T2-weighted imaging, late enhancement (LGE), T2-mapping, native and post-contrast T1-mapping. Myocardial T2- and T1-relaxation times were determined for every voxel. Abnormal voxels as defined by having T2- and T1-values beyond a predefined threshold (T2 > 50 ms, native T1 > 1250 ms and post-contrast T1 < 350 ms) were highlighted and compared with LGE as the reference...

Bone marrow-derived mesenchymal stem cells (BMSCs) have the ability to regenerate myocadial tissue. BMSCs transplantation can produce cardiac-like cells,promote angiogenesis, and secrete a variety of growth factors and cytokines. This article summarizes the molecular mechanisms of myocardial repair, explores the potential regenerative capacity of cardiac muscles after myocardial infarction,and reviews the previous studies on BMSC transplantation for treatment of cardiac muscle after myocardial infarction, with an attempt to provide new insights in clinical decision-making...

Acute coronary syndromes and, in paticular, ST - segment elevation myocardial infarction are the principle causes or mortality and morbidity in the industrialized countries. The manadgement of acute myocadial infarction is much debated in the literature; primary percutaneous coronary intervention is the treatment of choice. In the recent years there has been an increasing interest in the concept of adjunctive pharmacological therapy to improve outcomes in primary percutaneous coronary intervention. In the literature randomized trials of intravenous or more recently intracoronary injection of glycoprotein IIb/IIIa inhibitors have provided conflicting results with no definitive evidence for efficacy...

A 78-year-old man presented with an eight-hour history of chest distress. Electrocardiograph and serum cardiac enzymes were suggestive of acute inferior myocardial infarction with right ventricular infarction. The patient, who underwent emergency percutaneous coronary intervention, suffered from thrombocytopenia presenting with cerebral infarction and myocadial reinfarction during haparin exposure. The laboratory test for heparin-induced thrombocytopenia (HIT) specific antibodies (heparin-platelet factor, PF4) was positive...

OBJECTIVE: To study the effect and mechanism of Fulu Baoxin Oral Liquid (FBOL) on lipid peroxidation (LPO), plasma nitric oxide (NO) and vascular endothelial growth factor (VEGF) in myocadial tissue of rats with acute myocardial infarction (AMI). METHODS: The contents of superoxide dismutase (SOD), malondialdehyde (MDA) and VEGF in myocardial tissue and the plasm NO level were determined by immunohistochemical method. RESULTS: Compared with those in AMI model rats, contents of SOD, plasma NO and myocardial VEGF were higher and MDA was lower obviously in the FBOL high dosage and coronary favorable medicine treated rats (P < 0...

OBJECTIVE: To observe whether ginsenoside Rg1 could reduce the infarcted area and improve the heart function by path of promoting bone marrow stem cells differentiated to vascular endothelial cells (VECs). METHODS: Bone marrow was drawn from rabbit's ilium and labelled with red fluorochrome DiI, then it was transferred again into the rabbit's body. The rabbits was then made into myocardiac infarction model. The model rabbits were divided into the control group and the ginsenoside Rgl treated group (treated group)...

BACKGROUND: Renal transplant recipients should be screened for coronary artery disease. The purpose of this study was to evaluate the usefulness of thallium-201 dipyridamole myocardial perfusion single-photon emission computed tomography (SPECT) to predict major cardiac events in these patients. METHODS AND RESULTS: Eighty-two consecutive patients (61 males) in hemodialysis (HD) treatment, awaiting renal transplantation, underwent dipyridamole Tl-201 SPECT for pretransplant risk stratification...

It has been suggested that there may be gender differences in the outcome of myocardial infarction and therapies. However, there is a lack of knowledge regarding the basic science of gender difference in the setting of experimental myocadial infarction. Therefore, we performed a randomized study to determine whether there is a gender-related difference in infarct size as well as arrhythmias in an experimental model of myocardial infarction. Eleven male and 10 female adult rats were studied. All rats underwent 90 minutes of left main coronary occlusion and 4 hours of reperfusion...

No abstract text is available yet for this article.

No abstract text is available yet for this article.

The purpose of this study was to clarify the clinical and prognostic significance of silent myocardial ischemia (SMI) in patients with proven ischemic heart disease using ambulatory electrocardiographic monitoring (AEM). A total of two hundreds and ninety one patients, including 131 patients with stable effort angina (EA), 125 with previous myocardial infarction (MI), 21 with variant angina (VA), and 14 with unstable angina (UA) were examined. In 141 (EA 65, MI 41, VA 21, UA 14) of these 291 patients, we investigated the frequency and characteristics of SMI...

Myocardial hardness, defined as resistance to a pitting force, was measured on several sites of the myocardium in 20 anesthetized dogs. The durometer used for hardness measurements consisted of an indentor, 4 mm in diameter, pressed perpendicularly on the myocardium by a calibrated spring (elastic modulus 325 N/m). Hardness changes during the cardiac cycle caused movement of the indentor which interrupted a light beam falling on a photoresistance. Changes in illumination of the photoresistance resulted in resistance changes, which were recorded using a Wheatstone bridge and a DC amplifier...