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myocardial ischemic disease

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https://www.readbyqxmd.com/read/28448010/murine-left-anterior-descending-lad-coronary-artery-ligation-an-improved-and-simplified-model-for-myocardial-infarction
#1
Karla Reichert, Bonnie Colantuono, Isabella McCormack, Fernanda Rodrigues, Vasile Pavlov, M Ruhul Abid
Ischemic heart disease (IHD), or acute coronary syndrome (ACS), is one of the leading causes of death in the United States. IHD is characterized by reduced blood supply to the heart, resulting in the loss of oxygen to and the ensuing necrosis of the heart muscle. The MI model has gained popularity for its use as a short-term ischemia-reperfusion model and a long-term permanent ligation model. Below, we describe a reliable method for the permanent ligation of the LAD. With mouse genetic engineering technology becoming more advanced, and with an increasing availability of quality murine surgical instruments, the mouse has become a popular model for MI surgeries...
April 2, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28447974/3d-whole-heart-myocardial-tissue-analysis
#2
Hans Thijs Van den Broek, Leon De Jong, Pieter A Doevendans, Steven A J Chamuleau, Frebus J Van Slochteren, René Van Es
Cardiac regenerative therapies aim to protect and repair the injured heart in patients with ischemic heart disease. By injecting stem cells or other biologicals that enhance angio- or vasculogenesis into the infarct border zone (IBZ), tissue perfusion is improved, and the myocardium can be protected from further damage. For maximum therapeutic effect, it is hypothesized that the regenerative substance is best delivered to the IBZ. This requires accurate injections and has led to the development of new injection techniques...
April 12, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28446231/remote-ischemic-preconditioning-differentially-attenuates-post-ischemic-cardiac-arrhythmia-in-streptozotocin-induced-diabetic-versus-nondiabetic-rats
#3
Zhaoyang Hu, Mou Chen, Ping Zhang, Jin Liu, Geoffrey W Abbott
BACKGROUND: Sudden cardiac death (SCD), a leading cause of global mortality, most commonly arises from a substrate of cardiac ischemia, but requires an additional trigger. Diabetes mellitus (DM) predisposes to SCD even after adjusting for other DM-linked cardiovascular pathology such as coronary artery disease. We previously showed that remote liver ischemia preconditioning (RLIPC) is highly protective against cardiac ischemia reperfusion injury (IRI) linked ventricular arrhythmias and myocardial infarction, via induction of the cardioprotective RISK pathway, and specifically, inhibitory phosphorylation of GSK-3β (Ser 9)...
April 26, 2017: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/28444063/effect-of-lactation-on-myocardial-vulnerability-to-ischemic-insult-in-rats
#4
Sahar Askari, Alireza Imani, Hamidreza Sadeghipour, Mahdieh Faghihi, Zohreh Edalatyzadeh, Samira Choopani, Nasser Karimi, Sulail Fatima
Background: Cardiovascular diseases are the leading cause of mortality and long-term disability worldwide. Various studies have suggested a protective effect of lactation in reducing the risk of cardiovascular diseases. Objective: This study was designed to assess the effects of pregnancy and lactation on the vulnerability of the myocardium to an ischemic insult. Methods: Eighteen female rats were randomly divided into three groups: ischemia-reperfusion (IR), in which the hearts of virgin rats underwent IR (n = 6); lactating, in which the rats nursed their pups for 3 weeks and the maternal hearts were then submitted to IR (n = 6); and non-lactating, in which the pups were separated after birth and the maternal hearts were submitted to IR (n = 6)...
April 20, 2017: Arquivos Brasileiros de Cardiologia
https://www.readbyqxmd.com/read/28442930/thoracic-epidural-analgesia-reduces-myocardial-injury-in-ischemic-patients-undergoing-major-abdominal-cancer-surgery
#5
Mohamad Farouk Mohamad, Montaser A Mohammad, Diab F Hetta, Eman Hasan Ahmed, Ahmed A Obiedallah, Alaa Ali M Elzohry
BACKGROUND AND OBJECTIVES: Major abdominal cancer surgeries are associated with significant perioperative mortality and morbidity due to myocardial ischemia and infarction. This study examined the effect of perioperative patient controlled epidural analgesia (PCEA) on occurrence of ischemic cardiac injury in ischemic patients undergoing major abdominal cancer surgery. PATIENTS AND METHODS: One hundred and twenty patients (American Society of Anesthesiologists grade II and III) of either sex were scheduled for elective upper gastrointestinal cancer surgeries...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28441614/learning-from-an-analysis-of-closed-malpractice-litigation-involving-myocardial-infarction
#6
Kuan-Han Wu, Yung-Lin Yen, Chien-Hung Wu, Chi-Yuan Hwang, Shih-Yu Cheng
OBJECTIVE: To examine the epidemiologic data, identify the pattern of dispute, and determine clinical litigious errors by analyzing closed malpractice claims involving myocardial infarction (MI) in Taiwanese courts. METHODS: A retrospective descriptive study was performed to analyze the verdicts pertaining to MI from the population-based database of the Taiwan judicial system between 2002 and 2013. The results of adjudication, involved specialists, primary dispute leading to lawsuits, and litigious errors were recorded...
April 13, 2017: Journal of Forensic and Legal Medicine
https://www.readbyqxmd.com/read/28440905/clinical-follow-up-of-women-after-hypertensive-disease-in-pregnancy
#7
H A Boyd
That hypertensive disorders of pregnancy (HDP) affect maternal health even after delivery of the baby and the placenta, is no longer in doubt. Women with a history of HDP, preeclampsia in particular, have well-documented increased risks of later hypertension, ischemic heart disease, myocardial infarction, ischemic stroke, venous thromboembolism, and cardiomyopathy. However, our understanding of how "later" is defined - i.e. when exactly HDP-associated disease risks increase - is shifting. This article is protected by copyright...
April 25, 2017: BJOG: An International Journal of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/28440472/human-umbilical-cord-mesenchymal-stem-cells-alleviate-acute-myocarditis-by-modulating-endoplasmic-reticulum-stress-and-extracellular-signal-regulated-1-2-mediated-apoptosis
#8
Changyi Zhang, Guichi Zhou, Chanxin Cai, Jindi Li, Fen Chen, Lichun Xie, Wei Wang, Yonggang Zhang, Xiulan Lai, Lian Ma
Acute myocarditis is a non-ischemic inflammatory disease of the myocardium, and there is currently no standard treatment. Mesenchymal stem cells (MSCs) can alleviate myosin‑induced myocarditis; however, the mechanism has not been clearly elucidated. In the present study, the authors investigated the ability of human umbilical cordMSCs (HuMSCs) to attenuate myocardial injury and dysfunction during the acute phase of experimental myocarditis. Male Lewis rats (aged 8 weeks) were injected with porcine myosin to induce myocarditis...
April 11, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28439851/exploring-the-pathophysiology-of-takotsubo-cardiomyopathy
#9
REVIEW
Wengen Chen, Vasken Dilsizian
PURPOSE OF REVIEW: The purpose of this review is to explore the pathophysiology of Takotsubo cardiomyopathy by appraising the interplay between myocardial perfusion, function, metabolism, and, particularly, sympathetic innervation. RECENT FINDINGS: A number of hypotheses have been proposed to explain the pathogenesis of Takotsubo cardiomyopathy, which include (1) catecholamine cardiac toxicity, (2) myocardial sympathetic innervation disruption, (3) coronary vasospasm, (4) myocardial microvascular dysfunction, and (5) aborted myocardial infarction...
June 2017: Current Cardiology Reports
https://www.readbyqxmd.com/read/28439730/physiological-and-therapeutic-regulation-of-pcsk9-activity-in-cardiovascular-disease
#10
REVIEW
Simon Glerup, Rainer Schulz, Ulrich Laufs, Klaus-Dieter Schlüter
Ischemic heart disease is the main cause of death worldwide and is accelerated by increased levels of low-density lipoprotein cholesterol (LDL-C). Proprotein convertase subtilisin/kexin type 9 (PCSK9) is a potent circulating regulator of LDL-C through its ability to induce degradation of the LDL receptor (LDLR) in the lysosome of hepatocytes. Only in the last few years, a number of breakthroughs in the understanding of PCSK9 biology have been reported illustrating how PCSK9 activity is tightly regulated at several levels by factors influencing its transcription, secretion, or by extracellular inactivation and clearance...
May 2017: Basic Research in Cardiology
https://www.readbyqxmd.com/read/28433332/cardiovascular-outcomes-in-patients-with-peripheral-arterial-disease-as-an-initial-or-subsequent-manifestation-of%C3%A2-atherosclerotic-disease-results-from-a-swedish-nationwide-study
#11
Birgitta Sigvant, Pål Hasvold, Björn Kragsterman, Mårten Falkenberg, Saga Johansson, Marcus Thuresson, Joakim Nordanstig
OBJECTIVE: Long-term progression of peripheral arterial disease (PAD) as initial manifestation of atherosclerotic arterial disease is not well described. Cardiovascular (CV) risk was examined in different PAD populations diagnosed in a hospital setting in Sweden. METHODS: Data for this retrospective cohort study were retrieved by linking data on morbidity, medication use, and mortality from Swedish national registries. Primary CV outcome was a composite of myocardial infarction, ischemic stroke (IS), and CV death...
April 19, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28433215/meta-analysis-of-randomized-controlled-trials-of-percutaneous-coronary-intervention-with-drug-eluting-stents-versus-coronary-artery-bypass-grafting-in-left-main-coronary-artery-disease
#12
Aakash Garg, Sunil V Rao, Sahil Agrawal, Kleanthis Theodoropoulos, Marco Mennuni, Abhishek Sharma, Lohit Garg, Giuseppe Ferrante, Omar A Meelu, Davit Sargsyan, Bernhard Reimers, Marc Cohen, John B Kostis, Giulio G Stefanini
Few randomized controlled trials (RCTs) and observational studies had shown acceptable short-term efficacy and safety of percutaneous coronary intervention (PCI) with drug-eluting stents (DES) compared with coronary artery bypass grafting (CABG) in selected patients with left main coronary artery disease (LMCAD). We aimed to evaluate long-term outcomes of PCI using DES compared with CABG in patients with LMCAD. On November 1, 2016, we searched available databases for published RCTs directly comparing DES PCI with CABG in patients with LMCAD...
March 29, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28432636/what-is-the-current-knowledge-about-the-cardiovascular-risk-for-users-of-cannabis-based-products-a-systematic-review
#13
REVIEW
Emilie Jouanjus, Valentin Raymond, Maryse Lapeyre-Mestre, Valérie Wolff
PURPOSE OF REVIEW: The purpose of the study was to examine the published evidence on the cardiovascular risk related to the use of cannabis-based products by performing a systematic review of recent literature. RECENT FINDINGS: The World Health Organization (WHO) emphasizes that cannabis use represents a risky behavior as it may lead to many adverse effects, and in particular, cardiovascular effects. A systematic review of articles published between January 1, 2011 and May 31, 2016 was performed in agreement with the PRISMA statement...
June 2017: Current Atherosclerosis Reports
https://www.readbyqxmd.com/read/28431861/cardiac-computed-tomography-derived-myocardial-mass-at-risk-using-the-voronoi-based-segmentation-algorithm-a-histological-validation-study
#14
Seiko Ide, Satoru Sumitsuji, Osamu Yamaguchi, Yasushi Sakata
BACKGROUND: Myocardial mass at risk (MMAR) is an important predictor of adverse cardiac events in patients with ischemic heart disease. This study aims to validate the accuracy of MMAR calculated from cardiac computed tomography (CCT) data using the Voronoi-based segmentation algorithm in comparison with actual MMAR measured on ex-vivo swine hearts prepared by injecting a dye into the coronary arteries. METHODS: Fifteen extracted swine hearts had India ink injected into one of the major coronary arteries...
April 18, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28430816/possible-increase-in-insulin-resistance-and-concealed-glucose-coupled-potassium-lowering-mechanisms-during-acute-coronary-syndrome-documented-by-covariance-structure-analysis
#15
Satoshi Ito, Tomohisa Nagoshi, Kosuke Minai, Yusuke Kashiwagi, Hiroshi Sekiyama, Akira Yoshii, Haruka Kimura, Yasunori Inoue, Kazuo Ogawa, Toshikazu D Tanaka, Takayuki Ogawa, Makoto Kawai, Michihiro Yoshimura
OBJECTIVE: Although glucose-insulin-potassium (GIK) therapy ought to be beneficial for ischemic heart disease in general, variable outcomes in many clinical trials of GIK in acute coronary syndrome (ACS) had a controversial impact. This study was designed to examine whether "insulin resistance" is involved in ACS and to clarify other potential intrinsic compensatory mechanisms for GIK tolerance through highly statistical procedure. METHODS AND RESULTS: We compared the degree of insulin resistance during ACS attack and remission phase after treatment in individual patients (n = 104)...
2017: PloS One
https://www.readbyqxmd.com/read/28427124/-contemporary-use-of-ticagrelor-in-patients-with-acute-coronary-syndrome-after-discharge
#16
J Liu, H B Yan, L Song, Y H Hua, H J Zhao, C Liu, P Zhou, J N Li, Y Tan, Y M Yang, Y Wu
Objective: To investigate the degree and determinants of using ticagrelor among discharged patients with acute coronary syndrome (ACS). Methods: Patients with ACS in Fuwai hospital who were given ticagrelor after discharge between Jan. 2015 to Jun. 2015 were analyzed.The clinical characteristics and adherence to ticagrelor of these patients were collected by reviewing the electronic medical records and telephone interview.Date were statistically-analyzed. Results: Among all screened 404 patients, 158 (39.1%) patients prematurely stopped ticagrelor within 12 months, while 119(29...
April 18, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28424623/notch-signaling-in-ischemic-damage-and-fibrosis-evidence-and-clues-from-the-heart
#17
REVIEW
Silvia Nistri, Chiara Sassoli, Daniele Bani
Notch signaling is a major intercellular coordination mechanism highly conserved throughout evolution. In vertebrates, Notch signaling is physiologically involved in embryo development, including mesenchymal cell commitment, formation of heart tissues and angiogenesis. In post-natal life, Notch signaling is maintained as a key mechanism of cell-cell communication and its dysregulations have been found in pathological conditions such as ischemic and fibrotic diseases. In the heart, Notch takes part in the protective response to ischemia, being involved in pre- and post-conditioning, reduction of reperfusion-induced oxidative stress and myocardial damage, and cardiomyogenesis...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28423616/suppression-of-microrna-16-protects-against-acute-myocardial-infarction-by-reversing-beta2-adrenergic-receptor-down-regulation-in-rats
#18
Jiaqi Liu, Fei Sun, Yuying Wang, Wanqi Yang, Hongwen Xiao, Yue Zhang, Renzhong Lu, Haixia Zhu, Yuting Zhuang, Zhenwei Pan, Zhiguo Wang, Zhimin Du, Yanjie Lu
microRNA-16 (miR-16) has been shown to be up-regulated in ischemic heart. Beta2-adrenoreceptor (β2-AR) exerts cardioprotective property in ischemic injury. This study aims to determine the effect of miR-16 in cardiac injury in rats and the possible involvement of β2-AR in this process. Acute myocardial infarction (AMI) model in rats was induced by ligation of left coronary artery. Neonatal rat ventricular cells (NRVCs) were cultured in vitro tests. The cardiomyocyte model of oxidative injury was mimicked by hydrogen peroxide...
March 21, 2017: Oncotarget
https://www.readbyqxmd.com/read/28421779/oral-glutamine-reduces-myocardial-damage-after-coronary-revascularization-under-cardiopulmonary-bypass-a-randomized-clinical-trial
#19
Mariana Chávez-Tostado, Fernando Carrillo-Llamas, Porfirio Eduardo Martínez-Gutiérrez, Araceli Alvarado-Ramírez, Jaime Gilberto López-Taylor, José Clemente Vásquez-Jiménez, Clotilde Fuentes-Orozco, Jorge Rendón-Félix, Leire Irusteta-Jiménez, Vanessa Carolina Calil-Romero, José Antonio Ramírez-Jiménez, Luis Rodrigo Michel-Espinoza, Carmen Karina Contreras-López, Lizbeth Araceli Cuesta-Márquez, Alejandro González-Ojeda
BACKGROUND: Glutamine is the most abundant free amino acid in the body. It modulates immune cell function and is an important energy substrate for cells in critically ill patients. Reduction of injury cardiac markers had been observed in patients receiving intravenous glutamine and in a pilot study with oral glutamine. The aim of this study was to analyze the effect of preoperative oral supplementation of glutamine on postoperative serum levels of cardiac injury markers. METHODS: A randomized clinical trial was performed in 28 Mexican patients with ischemic heart disease who underwent cardiopulmonary bypass with extracorporeal circulation...
March 30, 2017: Nutrición Hospitalaria: Organo Oficial de la Sociedad Española de Nutrición Parenteral y Enteral
https://www.readbyqxmd.com/read/28421373/role-of-glycogen-synthase-kinase-following-myocardial-infarction-and-ischemia-reperfusion
#20
REVIEW
S Ghaderi, N Alidadiani, N Dilaver, H R Heidari, R Parvizi, R Rahbarghazi, J Soleimani-Rad, B Baradaran
Glycogen synthase kinase-3 beta (GSK3β) is principally is a glycogen synthase phosphorylating enzyme that is well known for its role in muscle metabolism. GSK3β is a serine/threonine protein Kinase, which is responsible for several essential roles in mammalian cells. This enzyme is implicated in the pathophysiology of many conditions involved in homeostasis and cellular immigration. GSK3β is involved in several pathways leading to neurodegenerative diseases such as Alzheimer's disease and Parkinson's disease...
April 18, 2017: Apoptosis: An International Journal on Programmed Cell Death
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