keyword
MENU ▼
Read by QxMD icon Read
search

Cardiac arrhythmia

keyword
https://www.readbyqxmd.com/read/28102901/risk-of-arrhythmic-death-in-ischemic-heart-disease-a-prospective-controlled-observer-blind-investigation-over-10-years
#1
Thomas Pezawas, André Diedrich, David Robertson, Robert Winker, Bernhard Richter, Li Wang, Herwig Schmidinger
BACKGROUND: Risk of arrhythmic death is considered highest in ischemic heart disease with severe left ventricular ejection fraction (LVEF) reduction. Non-invasive testing should improve decision-making of prophylactic defibrillator (ICD) implantation. METHODS AND RESULTS: We enrolled 120 patients with ischemic heart disease and LVEF <50% and 30 control subjects without ischemic heart disease and normal LVEF. An initial assessment, a second assessment after 3 years, and a final follow-up comprised of: pharmacological baroreflex testing (BRS), short-term spectral (low frequency (LF) to high frequency (HF) ratio) and long-term time domain analysis of heart rate variability (SDNN), exercise Microvolt T-wave alternans (MTWA) and others...
January 19, 2017: European Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28102477/potential-new-mechanisms-of-pro-arrhythmia-in-arrhythmogenic-cardiomyopathy-focus-on-calcium-sensitive-pathways
#2
REVIEW
C J M van Opbergen, M Delmar, T A B van Veen
Arrhythmogenic cardiomyopathy, or its most well-known subform arrhythmogenic right ventricular cardiomyopathy (ARVC), is a cardiac disease mainly characterised by a gradual replacement of the myocardial mass by fibrous and fatty tissue, leading to dilatation of the ventricular wall, arrhythmias and progression towards heart failure. ARVC is commonly regarded as a disease of the intercalated disk in which mutations in desmosomal proteins are an important causative factor. Interestingly, the Dutch founder mutation PLN R14Del has been identified to play an additional, and major, role in ARVC patients within the Netherlands...
January 19, 2017: Netherlands Heart Journal
https://www.readbyqxmd.com/read/28102233/arrhythmias-optogenetic-control-of-cardiac-rhythm
#3
Dario Ummarino
No abstract text is available yet for this article.
January 19, 2017: Nature Reviews. Cardiology
https://www.readbyqxmd.com/read/28101660/pocketecg-a-new-noninvasive-method-for-continuous-and-real-time-ecg-monitoring-initial-results-in-children-and-adolescents
#4
Katarzyna Bieganowska, Agnieszka Kaszuba, Maciej Bieganowski, Krzysztof Kaczmarek
Long-term ECG is widely used in diagnosis and assessment of many cardiac symptoms which may be caused by dangerous arrhythmias that sometimes can be difficult to document. The PocketECG system is a new technological solution for a long-term, noninvasive, continuous and real-time ECG monitoring that provides automatic diagnosis of dysrhythmias. ECG data transmission occurs over a mobile network. The goal of this study was to assess the reliability of long-term ECG recordings acquired with the PocketECG system...
January 18, 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/28101152/the-association-between-herg-gene-expression-and-cardiac-arrhythmia-disease-in-children
#5
Mingyu Fu, Chunli Li, Qingwen Wang, Yan Wang, Xinjiang An
We explored the possible link between the expression of HERG gene and cardiomyopathy in children. From April 2013 to April 2015, 73 children with cardiac arrhythmia who were treated were enrolled in the present study to serve as the observation group. At the same time, 76 normal individuals were also enrolled as the control group. HERG expression level in the observation group was compared with the control group. To determine the level of HERG gene expression we used fluorescent directional PCR, enzyme immunoassay and western blot analysis...
December 2016: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28100983/a-malignant-arrhythmia-cardiac-metastasis-and-ventricular-tachycardia
#6
Muthiah Vaduganathan, Nilay K Patel, Steven A Lubitz, Tomas G Neilan, David M Dudzinski
No abstract text is available yet for this article.
December 2016: Texas Heart Institute Journal
https://www.readbyqxmd.com/read/28100976/ventricular-tachycardia-in-fabry-disease-detected-in-a-50-year-old-woman-during-14-day-continuous-cardiac-monitoring
#7
Jaime Silva-Gburek, Laura Rochford, Robert Hopkin, John L Jefferies
Fabry disease is an X-linked lysosomal storage disorder. Female carriers were long thought to be asymptomatic; however, research has revealed the opposite. Cardiac conditions are the chief causes of death in women with Fabry disease. Although ventricular tachycardia has been reported in male patients with Fabry disease, it is not thought to be a frequent finding in females. We describe the case of a 50-year-old woman in whom we used 14-day continuous electrocardiographic monitoring to identify nonsustained ventricular tachycardia, after electrocardiograms and 24-hour Holter monitoring failed to detect the arrhythmia...
December 2016: Texas Heart Institute Journal
https://www.readbyqxmd.com/read/28100342/-the-effect-on-myocardial-perfusion-and-clinical-outcome-of-intracoronary-nicorandil-injection-prior-to-percutaneous-coronary-intervention-in-st-segment-elevation-myocardial-infarction
#8
Z Q Wang, M X Chen, D L Liu, W X Zheng, X Z Cao, H Chen, M F Huang, Z R Luo
Objective: To investigate the effect of intracoronary administration of nicorandil prior to primary percutaneous coronary intervention (PPCI) on myocardial perfusion and short-term clinical outcomes in patients with ST-segment elevation myocardial infarction (STEMI). Methods: A total of 158 patients with STEMI undergoing PPCI from January 2014 to December 2015 in Fuzhou General Hospital were enrolled consecutively in this prospective controlled randomized trial. Patients were assigned into three groups with random number table: the nicorandil group (patients received intracoronary administration of 6 mg nicorandil after guide wire or balloon successfully crossed the target lesion, n=53), the nitroglycerin group (patients received intracoronary administration of 300 μg nitroglycerin after after guide wire or balloon successfully crossed the target lesion, n=52) and the control group(patients received routine treatment, n=53)...
January 25, 2017: Zhonghua Xin Xue Guan Bing za Zhi
https://www.readbyqxmd.com/read/28099588/dobutamine-stress-echocardiography-safety-in-chagas-disease-patients
#9
Daniela do Carmo Rassi, Marcelo Luiz Campos Vieira, Rogerio Gomes Furtado, Fabio de Paula Turco, Luciano Henrique Melato, Viviane Tiemi Hotta, Colandy Godoy de Oliveira Nunes, Luiz Rassi, Salvador Rassi
Background: A few decades ago, patients with Chagas disease were predominantly rural workers, with a low risk profile for obstructive coronary artery disease (CAD). As urbanization has increased, they became exposed to the same risk factors for CAD of uninfected individuals. Dobutamine stress echocardiography (DSE) has proven to be an important tool in CAD diagnosis. Despite being a potentially arrhythmogenic method, it is safe for coronary patients without Chagas disease. For Chagas disease patients, however, the indication of DSE in clinical practice is uncertain, because of the arrhythmogenic potential of that heart disease...
January 16, 2017: Arquivos Brasileiros de Cardiologia
https://www.readbyqxmd.com/read/28098356/mechano-chemo-transduction-in-cardiac-myocytes
#10
Ye Chen-Izu, Leighton T Izu
The heart has the ability to adjust to changing mechanical loads. The Frank-Starling law and the Anrep effect describe exquisite intrinsic mechanisms the heart has for autoregulating the force of contraction to maintain cardiac output under preload and afterload. Although these mechanisms have been known for more than a century, their cellular and molecular underpinnings are still debated. How does the cardiac myocyte sense a change in preload or afterload? How does the myocyte adjust its response to compensate for such changes? In cardiac myocytes Ca(2+) is a crucial regulator of contractile force and in this review we compare and contrast recent results from different labs that address two important questions...
January 18, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28097009/statin-utilisation-in-a-real-world-setting-a-retrospective-analysis-in-relation-to-arterial-and-cardiovascular-autonomic-function
#11
John D Sluyter, Alun D Hughes, Andrew Lowe, Carlos A Camargo, Robert K R Scragg
Randomized trials suggest that statin treatment may lower blood pressure and influence cardiovascular autonomic function (CVAF), but the impact of duration of usage, discontinuation, and adherence to this therapy is unknown. We examined these issues with regard to blood pressure (BP)-related variables in a large, population-based study. Participants were 4942 adults (58% male; aged 50-84 years): 2179 on statin treatment and 2763 untreated. Days of utilization, adherence (proportion of days covered ≥0.8), and discontinuation (non-use for ≥30 days immediately prior to BP measurement) of three statins (atorvastatin, pravastatin, and simvastatin) over a period of up to 2 years was monitored retrospectively from electronic databases...
December 2016: Pharmacology Research & Perspectives
https://www.readbyqxmd.com/read/28096388/competition-of-calcified-calmodulin-n-lobe-and-pip2-to-an-lqt-mutation-site-in-kv7-1-channel
#12
William Sam Tobelaim, Meidan Dvir, Guy Lebel, Meng Cui, Tal Buki, Asher Peretz, Milit Marom, Yoni Haitin, Diomedes E Logothetis, Joel Alan Hirsch, Bernard Attali
Voltage-gated potassium 7.1 (Kv7.1) channel and KCNE1 protein coassembly forms the slow potassium current IKS that repolarizes the cardiac action potential. The physiological importance of the IKS channel is underscored by the existence of mutations in human Kv7.1 and KCNE1 genes, which cause cardiac arrhythmias, such as the long-QT syndrome (LQT) and atrial fibrillation. The proximal Kv7.1 C terminus (CT) binds calmodulin (CaM) and phosphatidylinositol-4,5-bisphosphate (PIP2), but the role of CaM in channel function is still unclear, and its possible interaction with PIP2 is unknown...
January 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28096344/atrial-natriuretic-peptide-regulates-adipose-tissue-accumulation-in-adult-atria
#13
Nadine Suffee, Thomas Moore-Morris, Patrick Farahmand, Catherine Rücker-Martin, Gilles Dilanian, Magali Fradet, Daigo Sawaki, Geneviève Derumeaux, Pascal LePrince, Karine Clément, Isabelle Dugail, Michel Puceat, Stéphane N Hatem
The abundance of epicardial adipose tissue (EAT) is associated with atrial fibrillation (AF), the most frequent cardiac arrhythmia. However, both the origin and the factors involved in EAT expansion are unknown. Here, we found that adult human atrial epicardial cells were highly adipogenic through an epithelial-mesenchymal transition both in vitro and in vivo. In a genetic lineage tracing the WT1(CreERT2+/-)Rosa(tdT+/-) mouse model subjected to a high-fat diet, adipocytes of atrial EAT derived from a subset of epicardial progenitors...
January 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28096168/sk-channel-enhancers-attenuate-ca2-dependent-arrhythmia-in-hypertrophic-hearts-by-regulating-mito-ros-dependent-oxidation-and-activity-of-ryr
#14
Tae Yun Kim, Radmila Terentyeva, Karim H F Roder, Weiyan Li, Man Liu, Ian Greener, Shanna Hamilton, Iuliia Polina, Kevin R Murphy, Richard T Clements, Samuel C Dudley, Gideon Koren, Bum-Rak Choi, Dmitry Terentyev
AIM: s: Plasmamembrane small conductance Ca<su2+p>-activated K<su+ p > (SK) channels were implicated in ventricular arrhythmias in infarcted and failing hearts. Recently, SK channels were detected in the mitochondria inner membrane (mSK), and their activation protected from acute ischemia-reperfusion injury by reducing intracellular levels of reactive oxygen species (ROS). We hypothesized that mSK play an important role in regulating mitochondrial function in chronic cardiac diseases...
January 17, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/28095388/the-use-of-mitraclip-for-symptomatic-patients-with-hypertrophic-obstructive-cardiomyopathy
#15
Felix Thomas, Florian Rader, Robert J Siegel
OBJECTIVES: Current nonpharmacological therapies for symptomatic patients with hypertrophic obstructive cardiomyopathy (HOCM), including septal myectomy and alcohol septal ablation (ASA), carry significant risks for serious cardiac conduction abnormalities. We present a review of the currently available published data regarding the novel use of the relatively low-risk MitraClip® system in the treatment of symptomatic patients. METHODS: Data were collected from 4 separate studies on the use of the MitraClip on 15 symptomatic HOCM patients with systolic anterior motion (SAM) of the mitral valve apparatus...
January 18, 2017: Cardiology
https://www.readbyqxmd.com/read/28094801/electronegative-ldl-mediated-cardiac-electrical-remodeling-in-a-rat-model-of-chronic-kidney-disease
#16
An-Sheng Lee, Wei-Yu Chen, Hua-Chen Chan, Ching-Hu Chung, Hsien-Yu Peng, Chia-Ming Chang, Ming-Jai Su, Chu-Huang Chen, Kuan-Cheng Chang
The mechanisms underlying chronic kidney disease (CKD)-associated higher risks for life-threatening ventricular tachyarrhythmias remain poorly understood. In rats subjected to unilateral nephrectomy (UNx), we examined cardiac electrophysiological remodeling and relevant mechanisms predisposing to ventricular arrhythmias. Adult male Sprague-Dawley rats underwent UNx (n = 6) or sham (n = 6) operations. Eight weeks later, the UNx group had higher serum blood urea nitrogen and creatinine levels and a longer electrocardiographic QTc interval than did the sham group...
January 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28094454/boosting-the-reserves-additive-regulation-of-cardiac-repolarisation
#17
Adam P Hill
Since the first description of the mechanism of digitalis toxicity in this journal in 1978 (Kass et al. 1978), abnormal calcium handling has been established as a key player across a spectrum of ventricular arrhythmias. This article is protected by copyright. All rights reserved.
January 17, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28093803/novel-ecg-synchronized-pulsatile-ecls-system-with-various-heart-rates-and-cardiac-arrhythmias-an-in-vitro-study
#18
Shigang Wang, Shannon B Spencer, Allen R Kunselman, Akif Ündar
The objective of this study is to evaluate electrocardiography (ECG)-synchronized pulsatile flow under varying heart rates and different atrial and ventricular arrhythmias in a simulated extracorporeal life support (ECLS) system. The ECLS circuit consisted of an i-cor diagonal pump and console, an iLA membrane ventilator, and an 18 Fr arterial cannula. The circuit was primed with lactated Ringer's solution and packed red blood cells (hematocrit 35%). An ECG simulator was used to trigger pulsatile flow and to generate selected cardiac rhythms...
January 2017: Artificial Organs
https://www.readbyqxmd.com/read/28092285/perioperative-%C3%AE-blockers-in-patients-undergoing-noncardiac-surgery-scientific-misconduct-and-clinical-guidelines
#19
Dhauna Karam, Rohit Arora
BACKGROUND: β-blocker use in perioperative period of noncardiac surgeries has been a topic of debate since many years. Earlier studies conducted in the 90s showed decreased cardiac adverse events and improved postoperative outcomes with β-blocker use. Based on this, the ACCF and ESC published guidelines strongly supporting β-blocker use. But contemporaneous studies conducted revealed conflicting evidence and have also proven some of the earlier studies to be fraudulent. Although ACCF guidelines have been updated to partially reflect the changes, ESC guidelines continue to support β-blocker use...
January 10, 2017: American Journal of Therapeutics
https://www.readbyqxmd.com/read/28091919/effects-of-deltorphin-ii-and-its-retroenantio-analog-on-cardiac-tolerance-to-ischemia-and-reperfusion
#20
A V Mukhomedzyanov, L N Maslov, M V Ovchinnikov, M V Sidorova, J M Pei, S Yu Tsibul'nikov, A V Tsepokina, M V Khutornaya, A G Kutikhin
Selective agonist of δ2-opioid receptors deltorphin II and its retroenantio analog (0.12 mg/kg intravenously) were preventively injected to male Wistar rats 15 min prior to 45-min coronary occlusion or 5 min before 120-min reperfusion. Administration of deltorphin II before artery occlusion and before reperfusion decreased the infarct size/area at risk ratio. Deltorphin II prevented the appearance of ischemia-provoked ventricular arrhythmias and exerted no effect on HR and BP (systolic and diastolic). The retroenantio analog of deltorphin II produced no antiarrhythmic or infarct-limiting effects, but reduced HR without affecting BP...
January 2017: Bulletin of Experimental Biology and Medicine
keyword
keyword
3193
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"