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https://www.readbyqxmd.com/read/28335261/nanomaterials-for-cardiac-myocyte-tissue-engineering
#1
REVIEW
Rodolfo Amezcua, Ajay Shirolkar, Carolyn Fraze, David A Stout
Since their synthesizing introduction to the research community, nanomaterials have infiltrated almost every corner of science and engineering. Over the last decade, one such field has begun to look at using nanomaterials for beneficial applications in tissue engineering, specifically, cardiac tissue engineering. During a myocardial infarction, part of the cardiac muscle, or myocardium, is deprived of blood. Therefore, the lack of oxygen destroys cardiomyocytes, leaving dead tissue and possibly resulting in the development of arrhythmia, ventricular remodeling, and eventual heart failure...
July 19, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28334718/sex-differences-do-not-exist-in-outcomes-among-stroke-patients-with-intracranial-atherosclerosis-in-china-subgroup-analysis-from-the-chinese-intracranial-atherosclerosis-study
#2
Yuehua Pu, Na Wei, Dandan Yu, Yilong Wang, Xinying Zou, Yannie O Y Soo, Yuesong Pan, Thomas W H Leung, Lawrence K S Wong, Yongjun Wang, Liping Liu
BACKGROUND: To date, sex difference in outcomes among patients with intracranial atherosclerosis (ICAS) has rarely been discussed in China as well as in the world. This study aimed to estimate the sex difference in outcomes among patients with ICAS in Chinese cerebral ischemia patients. METHODS: We analyzed 1,335 men and women with ICAS who were enrolled in the Chinese Intracranial Atherosclerosis study. They were followed-up for ischemic stroke recurrence, any cause of death, cerebral vascular events (including transient ischemic attack, ischemic and hemorrhagic stroke), combined end points (including cerebral vascular events, angina or myocardial infarction, pulmonary embolism, peripheral vascular events), and unfavorable outcome (modified Rankin scale score of 3-6) at 1 year...
March 24, 2017: Neuroepidemiology
https://www.readbyqxmd.com/read/28334645/long-term-residential-road-traffic-noise-and-no2-exposure-in-relation-to-risk-of-incident-myocardial-infarction-a-danish-cohort-study
#3
Nina Roswall, Ole Raaschou-Nielsen, Matthias Ketzel, Anders Gammelmark, Kim Overvad, Anja Olsen, Mette Sørensen
BACKGROUND: Road traffic is a source of both air pollution and noise; two environmental hazards both found to increase the risk of ischemic heart disease. Given the high correlation between these pollutants, it is important to investigate combined effects, in relation to myocardial infarction (MI). METHODS: Among 50,744 middle-aged Danes enrolled into the Diet, Cancer and Health cohort from 1993 to 97, we identified 2403 cases of incident MI during a median follow-up of 14...
March 20, 2017: Environmental Research
https://www.readbyqxmd.com/read/28334029/prognostic-power-of-global-2d-strain-according-to-left-ventricular-ejection-fraction-in-patients-with-st-elevation-myocardial-infarction
#4
Myung-Jin Cha, Hyun-Sook Kim, Seong Hwan Kim, Jae-Hyeong Park, Goo-Yeong Cho
BACKGROUNDS: We aimed to evaluate the predictive power of longitudinal and circumferential fibers according to left ventricular ejection fraction (LVEF) in successfully reperfused acute ST elevation myocardial infarction (STEMI) patients. METHODS: Total 691 patients (age 59±13, 20% female) underwent clinical evaluation and conventional and strain echocardiography (Global longitudinal strain (GLS), global circumferential strain (GCS)). The clinical outcome was defined as the composite of death, hospitalization for heart failure, non-fatal myocardial infarction, and ventricular arrhythmia...
2017: PloS One
https://www.readbyqxmd.com/read/28333976/early-diagnosis-of-acute-myocardial-infarction-using-high-sensitivity-troponin-i
#5
Johannes Tobias Neumann, Nils Arne Sörensen, Francisco Ojeda, Thomas Renné, Renate B Schnabel, Tanja Zeller, Mahir Karakas, Stefan Blankenberg, Dirk Westermann
OBJECTIVE: There is a clinical need for early and accurate diagnosis of acute myocardial infarction (AMI). Current European Society of Cardiology (ESC) guidelines recommend diagnosis of non-ST-elevation AMI based on serial troponin measurements. We aimed to challenge the ESC guidelines using 1) a high-sensitivity troponin I (hs-TnI) baseline cutoff, 2) an absolute hs-TnI change after 1 hour and 3) additional application of an ischemic ECG. METHODS: 1,516 patients with suspected AMI presenting to the emergency department were included...
2017: PloS One
https://www.readbyqxmd.com/read/28333941/phenotypically-heterogeneous-podoplanin-expressing-cell-populations-are-associated-with-the-lymphatic-vessel-growth-and-fibrogenic-responses-in-the-acutely-and-chronically-infarcted-myocardium
#6
Maria Cimini, Antonio Cannatá, Gianandrea Pasquinelli, Marcello Rota, Polina Goichberg
Cardiac lymphatic vasculature undergoes substantial expansion in response to myocardial infarction (MI). However, there is limited information on the cellular mechanisms mediating post-MI lymphangiogenesis and accompanying fibrosis in the infarcted adult heart. Using a mouse model of permanent coronary artery ligation, we examined spatiotemporal changes in the expression of lymphendothelial and mesenchymal markers in the acutely and chronically infarcted myocardium. We found that at the time of wound granulation, a three-fold increase in the frequency of podoplanin-labeled cells occurred in the infarcted hearts compared to non-operated and sham-operated counterparts...
2017: PloS One
https://www.readbyqxmd.com/read/28333381/protective-actions-of-h2s-in-acute-myocardial-infarction-and-heart-failure
#7
Erminia Donnarumma, Rishi K Trivedi, David J Lefer
Hydrogen sulfide (H2S) was identified as the third gasotransmitter in 1996 following the discoveries of the biological importance of nitric oxide and carbon monoxide. Although H2S has long been considered a highly toxic gas, the discovery of its presence and enzymatic production in mammalian tissues supports a critical role for this physiological signaling molecule. H2S is synthesized endogenously by three enzymes: cystathionine β-synthase, cystathionine-γ-lyase, and 3-mercaptopyruvate sulfurtransferase. H2S plays a pivotal role in the regulation of cardiovascular function as H2S has been shown to modulate: vasodilation, angiogenesis, inflammation, oxidative stress, and apoptosis...
March 16, 2017: Comprehensive Physiology
https://www.readbyqxmd.com/read/28333376/regulation-of-coronary-blood-flow
#8
Adam G Goodwill, Gregory M Dick, Alexander M Kiel, Johnathan D Tune
The heart is uniquely responsible for providing its own blood supply through the coronary circulation. Regulation of coronary blood flow is quite complex and, after over 100 years of dedicated research, is understood to be dictated through multiple mechanisms that include extravascular compressive forces (tissue pressure), coronary perfusion pressure, myogenic, local metabolic, endothelial as well as neural and hormonal influences. While each of these determinants can have profound influence over myocardial perfusion, largely through effects on end-effector ion channels, these mechanisms collectively modulate coronary vascular resistance and act to ensure that the myocardial requirements for oxygen and substrates are adequately provided by the coronary circulation...
March 16, 2017: Comprehensive Physiology
https://www.readbyqxmd.com/read/28333214/-forever-young-%C3%A2-testosterone-replacement-therapy-a-blockbuster-drug-despite-flabby-evidence-and-broken-promises
#9
Andrea Busnelli, Edgardo Somigliana, Paolo Vercellini
In the last decade, testosterone replacement therapy (TRT) has been increasingly prescribed to treat a controversial condition known as 'late-onset hypogonadism (LOH)'. This syndrome is diagnosed in men who, for no discernible reason other than older age, obesity or ill health have serum testosterone concentrations below the normal range for healthy young men and report one or more of the following symptoms: muscle weakness or wasting, mood, behaviour and cognition-related symptoms and sexual function or libido impairment...
February 23, 2017: Human Reproduction
https://www.readbyqxmd.com/read/28333102/biological-effect-of-licochalcone-c-on-the-regulation-of-pi3k-akt-enos-and-nf-%C3%AE%C2%BAb-inos-no-signaling-pathways-in-h9c2-cells-in-response-to-lps-stimulation
#10
Sara Franceschelli, Mirko Pesce, Alessio Ferrone, Daniela Maria Pia Gatta, Antonia Patruno, Maria Anna De Lutiis, José Luis Quiles, Alfredo Grilli, Mario Felaco, Lorenza Speranza
Polyphenols compounds are a group molecules present in many plants. They have antioxidant properties and can also be helpful in the management of sepsis. Licochalcone C (LicoC), a constituent of Glycyrrhiza glabra, has various biological and pharmacological properties. In saying this, the effect of LicoC on the inflammatory response that characterizes septic myocardial dysfunction is poorly understood. The aim of this study was to determine whether LicoC exhibits anti-inflammatory properties on H9c2 cells that are stimulated with lipopolysaccharide...
March 23, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28332511/risk-of-acute-myocardial-infarction-after-discontinuation-of-antihypertensive-agents-a-case-control-study
#11
F F Alharbi, P C Souverein, M C de Groot, A H Maitland-van der Zee, A de Boer, O H Klungel
We performed a nested case-control study in a cohort of antihypertensive drug users to assess the association between discontinuation of different antihypertensive agents and the risk of acute myocardial infarction (AMI). Cases and controls were drawn from the Utrecht Cardiovascular Pharmacogenetics database. Patients who were hospitalised for their first AMI were considered cases and controls were not hospitalised for AMI. Antihypertensive users were defined as current users if the index date (date of AMI) fell within the prescribed duration or as discontinuers if this date fell outside the prescribed duration...
March 23, 2017: Journal of Human Hypertension
https://www.readbyqxmd.com/read/28332500/cardiovascular-effects-of-electronic-cigarettes
#12
REVIEW
Neal L Benowitz, Joseph B Fraiman
Cardiovascular safety is an important consideration in the debate on the benefits versus the risks of electronic cigarette (EC) use. EC emissions that might have adverse effects on cardiovascular health include nicotine, oxidants, aldehydes, particulates, and flavourants. To date, most of the cardiovascular effects of ECs demonstrated in humans are consistent with the known effects of nicotine. Pharmacological and toxicological studies support the biological plausibility that nicotine contributes to acute cardiovascular events and accelerated atherogenesis...
March 23, 2017: Nature Reviews. Cardiology
https://www.readbyqxmd.com/read/28332362/signal-detection-of-imipenem-compared-to-other-drugs-from-korea-adverse-event-reporting-system-database
#13
Kyounghoon Park, Mick Soukavong, Jungmee Kim, Kyoung Eun Kwon, Xue Mei Jin, Joongyub Lee, Bo Ram Yang, Byung Joo Park
PURPOSE: To detect signals of adverse drug events after imipenem treatment using the Korea Institute of Drug Safety & Risk Management-Korea adverse event reporting system database (KIDS-KD). MATERIALS AND METHODS: We performed data mining using KIDS-KD, which was constructed using spontaneously reported adverse event (AE) reports between December 1988 and June 2014. We detected signals calculated the proportional reporting ratio, reporting odds ratio, and information component of imipenem...
May 2017: Yonsei Medical Journal
https://www.readbyqxmd.com/read/28332218/changes-in-myocardial-deformation-after-transcatheter-and-surgical-aortic-valve-replacement
#14
REVIEW
Vinisha Garg, Jonathan K Ho, Gabriel Vorobiof
Speckle tracking echocardiography (STE) has emerged as a novel angle-independent modality in assessing myocardial velocity, deformation, and strain. Its role in assessing change before and after aortic valve replacement in patients with aortic stenosis (AS) has recently generated interest. This review summarizes the practical utility and clinical implications of myocardial deformation by STE after surgical or transcatheter aortic valve replacement (TAVR). Overall, atrial strain and ventricular strain as measured by STE improve after surgical and transcatheter aortic intervention in short- and long-term follow-up with evidence of a more pronounced acute improvement in patients who undergo TAVR...
March 23, 2017: Echocardiography
https://www.readbyqxmd.com/read/28332215/effects-of-increased-left-ventricular-wall-thickness-on-the-myocardium-in-severe-aortic-stenosis-with-normal-left-ventricular-ejection-fraction-two-and-three-dimensional-multilayer-speckle-tracking-echocardiography
#15
Eun Jeong Cho, Sung-Ji Park, Eun Kyoung Kim, Ga Yeon Lee, Sung-A Chang, Jin-Oh Choi, Sang-Chol Lee, Seung Woo Park
BACKGROUND: The aim of this study was to determine the capability of real time three-dimensional echocardiography (RT3DE) and two-dimensional (2D) multilayer speckle tracking echocardiography (MSTE) for evaluation of early myocardial dysfunction triggered by increased left ventricular (LV) wall thickness in severe aortic stenosis (AS) with normal LV ejection fraction (EF≥55%). METHODS: Conventional, RT3D STE and 2D MSTE were performed in 45 patients (mean 68.9±9...
March 23, 2017: Echocardiography
https://www.readbyqxmd.com/read/28332179/reducing-radiation-to-patients-and-improving-image-quality-in-a-real-world-nuclear-cardiology-laboratory
#16
Stephen A Bloom, Karen Meyers
In part because of aging equipment and reduced reimbursement for imaging services in the last several years, nuclear cardiologists who remain in private practice face challenges in maintaining high quality and in reducing radiation exposure to patients. We review patient-centered approaches and affordable software solutions employed in our practice combined with supine-prone myocardial perfusion imaging to achieve increased interpretive confidence with reduced radiation exposure to patients.
March 22, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28332178/erratum-to-prognostic-impact-of-location-and-extent-of-vessel-related-ischemia-at-myocardial-perfusion-scintigraphy-in-patients-with-or-at-risk-for-coronary-artery-disease
#17
Francesco Nudi, Orazio Schillaci, Giandomenico Neri, Annamaria Pinto, Enrica Procaccini, Maurizio Vetere, Giacomo Frati, Fabrizio Tomai, Giuseppe Biondi-Zoccai
No abstract text is available yet for this article.
March 22, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28331489/reversible-atrial-fibrillation-following-crotalinae-envenomation
#18
Dan Quan, Kenneth Zurcher
BACKGROUND: Cardiotoxicity is a documented complication of Crotalinae envenomation. Reported cardiac complications following snake envenomation have included acute myocardial infarction, electrocardiogram abnormalities and arrhythmias. Few reports exist describing arrhythmia induced by viper envenomation and to our knowledge none describe arrhythmia induced by Crotalinae envenomation. This report concerns the first known case of atrial fibrillation precipitated by rattlesnake bite. CASE PRESENTATION: A 73-year-old Caucasian man with a past medical history of hypertension, hyperlipidemia, type 1 diabetes mellitus, and a baseline first-degree atrioventricular block presented to the emergency department following a rattlesnake bite to his left lower leg...
2017: Journal of Venomous Animals and Toxins Including Tropical Diseases
https://www.readbyqxmd.com/read/28331135/applicability-of-3-dimensional-quantitative-coronary-angiography-derived-computed-fractional-flow-reserve-for-intermediate-coronary-stenosis
#19
Kyoichiro Yazaki, Masato Otsuka, Shohei Kataoka, Mitsuru Kahata, Asako Kumagai, Koji Inoue, Hiroshi Koganei, Kenji Enta, Yasuhiro Ishii
BACKGROUND: Quantitative flow ratio (QFR) is a newly developed image-based index for estimating fractional flow reserve (FFR).Methods and Results:We analyzed 151 coronary arteries with intermediate stenosis in 142 patients undergoing wire-based FFR measurement using dedicated software. Predefined contrast flow QFR, which was derived from 3-dimensional quantitative coronary angiography (3-D QCA) withThrombolysis in Myocardial Infarction (TIMI) frame counts, was compared with FFR as a reference...
March 22, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28331118/reconsideration-of-secondary-risk-management-strategies-in-patients-with-ischemic-heart-disease
#20
Kuninobu Kashiyama, Shinjo Sonoda, Yutaka Otsuji
The main risk factors in ischemic heart diseases, including myocardial infarction, are hypertension, dyslipidemia, diabetes, obesity and smoking. The incidence of ischemic heart disease in Japan has been lower than that in Western countries because of differences in lifestyle and the anatomy of the coronary arteries, but the situation has been changing recently because of the westernization of lifestyle. Cardiovascular diseases have become the second most common cause of death in Japan, and 40% of those deaths are attributed to ischemic heart disease...
2017: Journal of UOEH
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