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Ventricular arrhythmias

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https://www.readbyqxmd.com/read/29909402/impact-of-exercise-restriction-on-arrhythmic-risk-among-patients-with-arrhythmogenic-right-ventricular-cardiomyopathy
#1
Weijia Wang, Gabriela Orgeron, Crystal Tichnell, Brittney Murray, Jane Crosson, Oliver Monfredi, Julia Cadrin-Tourigny, Harikrishna Tandri, Hugh Calkins, Cynthia A James
BACKGROUND: Prior studies have shown a close link between exercise and development of arrhythmogenic right ventricular cardiomyopathy. How much exercise restriction reduces ventricular arrhythmia (VA), how genotype modifies its benefit, and whether it reduces risk sufficiently to defer implantable cardioverter-defibrillator (ICD) placement in arrhythmogenic right ventricular cardiomyopathy are unknown. METHODS AND RESULTS: We interviewed 129 arrhythmogenic right ventricular cardiomyopathy patients (age: 34...
June 16, 2018: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29909164/-is-it-possible-to-practice-sports-with-an-implantable-cardioverter-defibrillator
#2
Charles Guenancia, Rodrigue Garcia
Why? The potential risks of sport for an ICD recipient include appropriate and inappropriate shocks, device damage and worsening of the underlying cardiopathy. These risks should be compared to the physical and psychological benefits of exercise. Where? Due to different medico-legal contexts and considering the results of recent studies, the new US guidelines are more permissive than the European guidelines regarding sport practice in ICD recipients. Who? The underlying context (structural or electrical cardiopathy, psychological impact) should be assessed before any decision is taken...
June 13, 2018: La Presse Médicale
https://www.readbyqxmd.com/read/29907652/cardiac-resynchronization-therapy-and-clinical-outcomes-in-continuous-flow-left-ventricular-assist-device-recipients
#3
Rakesh Gopinathannair, Henri Roukoz, Adarsh Bhan, Ashwin Ravichandran, Mustafa M Ahmed, Dmitry Familtsev, Geetha Bhat, Jennifer Cowger, Munazzah Abdullah, Chirag Sandesara, Rahul Dhawan, Emma J Birks, Jaimin R Trivedi, Mark S Slaughter
BACKGROUND: Many patients with heart failure continue cardiac resynchronization therapy (CRT) after continuous flow left ventricular assist device (CF-LVAD) implant. We report the first multicenter study to assess the impact of CRT on clinical outcomes in CF-LVAD patients. METHODS AND RESULTS: Analysis was performed on 488 patients (58±13 years, 81% male) with an implantable cardioverter defibrillator (ICD) (n=223) or CRT-D (n=265) who underwent CF-LVAD implantation at 5 centers from 2007 to 2015...
June 15, 2018: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29907466/sudden-death-risk-markers-for-patients-with-left-ventricular-ejection-fractions-greater-than-40
#4
REVIEW
Brian P Halliday, Amrit S Lota, Sanjay K Prasad
The major burden of sudden cardiac death (SCD) in patients with heart disease occurs in those with a left ventricular ejection fraction > 40%. Although the annual risk of SCD may be lower in these patients compared to those with lower LVEF, their lifetime cumulative risk of SCD may be greater due to a better overall prognosis. It is plausible that those with LVEF > 40% who are at highest risk of life-threatening arrhythmia will benefit from implantable cardioverter defibrillators. Features that identify patients with a LVEF > 40% at high risk of SCD are urgently needed...
June 12, 2018: Trends in Cardiovascular Medicine
https://www.readbyqxmd.com/read/29907152/the-effect-of-myocardial-action-potential-duration-on-cardiac-pumping-efficacy-a-computational-study
#5
Da Un Jeong, Ki Moo Lim
BACKGROUND AND AIMS: Although studies on the relation between arrhythmias and the action potential duration (APD) have been carried out, most of them are based only on electrophysiological factors of the heart and lack experiments that consider cardiac mechanical and electromechanical characteristics. Therefore, we conducted this study to clarify the relevance of the shortening of APD of a cell in relation to the mechanical contraction activity of the heart and the associated risk of arrhythmia...
June 15, 2018: Biomedical Engineering Online
https://www.readbyqxmd.com/read/29906523/ventricular-fibromas-in-children-arrhythmia-risk-and-outcomes-a-multicentre-study
#6
John P Jones, Tristan Ramcharan, Milind Chaudhari, Vinay Bhole, Karen Mcleod, Shankar Sadagopan, Orhan Uzun, Andrew Parry, Jan Till, Colin J McMahon, Alan G Stuart, Mark A Walsh
BACKGROUND: Although ventricular fibromas are a rare, they are the second most common type of cardiac tumor in children. While histologically benign, they have a propensity to cause malignant arrhythmias, with cardiac arrest often being the first presentation.; OBJECTIVE: To evaluate the arrhythmia risk, and management strategies for pediatric ventricular fibromas. METHODS: Fifteen centers in the British Paediatric Arrhythmia Group network were contacted to partake in the study to contribute cases...
June 12, 2018: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/29906289/activation-recovery-interval-imaging-of-premature-ventricular-contraction
#7
Ting Yang, Long Yu, Qi Jin, Liqun Wu, Bin He
Dispersion of ventricular repolarization due to abnormal activation contributes to the susceptibility to cardiac arrhythmias. However, the global pattern of repolarization is difficult to assess clinically. Activation recovery interval (ARI) has been used to understand the properties of ventricular repolarization. In this study, we developed an ARI imaging technique to noninvasively reconstruct three-dimensional (3D) ARI maps in 10 premature ventricular contraction (PVC) patients and evaluated the results with the endocardial ARI maps recorded by a clinical navigation system (CARTO)...
2018: PloS One
https://www.readbyqxmd.com/read/29905788/extended-use-of-the-wearable-cardioverter-defibrillator-in-patients-at-risk-for-sudden-cardiac-death
#8
Valentina Kutyifa, Katherine Vermilye, Usama A Daimee, Scott McNitt, Helmut Klein, Arthur J Moss
Aims: Data on outcomes in patients using the wearable cardioverter-defibrillator (WCD) > 90 days are limited. We aimed to analyse the clinical course of patients with WCD use ≤90 days vs. WCD use >90 days. Methods and results: We assessed arrhythmia events during WCD use, and ejection fraction (EF) improvement/implantable cardioverter-defibrillator (ICD) implantation at the end of WCD use in patients with WCD use ≤90 days vs. WCD use >90 days enrolled in the WEARIT-II registry, further assessed by disease aetiology (ischaemic vs...
June 14, 2018: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/29904445/malignant-ventricular-arrhythmias-resulting-from-drug-induced-qtc-prolongation-a-retrospective-study
#9
Renato De Vecchis, Carmelina Ariano, Giuseppina Di Biase, Michel Noutsias
Background: Several drug classes (antiarrhythmics, antimicrobials, antidepressants, phenothiazines, opiates, prokinetics of digestive tract, etc.) have been related to ventricular hyperkinetic arrhythmias such as torsade de pointes (TdP). TdPs are usually heralded by an abnormal prolongation of heart rate-corrected QT interval on the electrocardiogram, so-called drug-induced long heart rate-corrected QT (diLQTc). We don't know to what extent the drug-induced QTc prolongation is able to predict malignant arrhythmias...
July 2018: Journal of Clinical Medicine Research
https://www.readbyqxmd.com/read/29903630/automated-diagnosis-of-arrhythmia-using-combination-of-cnn-and-lstm-techniques-with-variable-length-heart-beats
#10
Shu Lih Oh, Eddie Y K Ng, Ru San Tan, U Rajendra Acharya
Arrhythmia is a cardiac conduction disorder characterized by irregular heartbeats. Abnormalities in the conduction system can manifest in the electrocardiographic (ECG) signal. However, it can be challenging and time-consuming to visually assess the ECG signals due to the very low amplitudes. Implementing an automated system in the clinical setting can potentially help expedite diagnosis of arrhythmia, and improve the accuracies. In this paper, we propose an automated system using a combination of convolutional neural network (CNN) and long short-term memory (LSTM) for diagnosis of normal sinus rhythm, left bundle branch block (LBBB), right bundle branch block (RBBB), atrial premature beats (APB) and premature ventricular contraction (PVC) on ECG signals...
June 5, 2018: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/29899058/a-privileged-role-for-neuronal-na-channels-in-regulating-ventricular-ca-2-and-arrhythmias
#11
DeAnalisa C Jones, Jingqi Q X Gong, Eric A Sobie
No abstract text is available yet for this article.
June 13, 2018: Journal of General Physiology
https://www.readbyqxmd.com/read/29898892/mitochondrial-ros-drive-sudden-cardiac-death-and-chronic-proteome-remodeling-in-heart-failure
#12
Swati Dey, Deeptankar DeMazumder, Agnieszka Sidor, D B Foster, Brian O'Rourke
<u>Rationale:</u> Despite increasing prevalence and incidence of heart failure (HF), therapeutic options remain limited. In early stages of HF, sudden cardiac death (SCD) from ventricular arrhythmias claims many lives. Reactive oxygen species (ROS) have been implicated in both arrhythmias and contractile dysfunction. However, little is known about how ROS in specific subcellular compartments contribute to HF or SCD pathophysiology. The role of ROS in chronic proteome remodeling has not been explored...
June 13, 2018: Circulation Research
https://www.readbyqxmd.com/read/29898838/randomized-placebo-controlled-trial-evaluating-the-safety-and-efficacy-of-single-low-dose-intracoronary-insulin-like-growth-factor-following-percutaneous-coronary-intervention-in-acute-myocardial-infarction-resus-ami
#13
Noel M Caplice, Mary C DeVoe, Janet Choi, Darren Dahly, Theodore Murphy, Ernest Spitzer, Robert Van Geuns, Michael M Maher, David Tuite, David M Kerins, Mohammed T Ali, Imtiaz Kalyar, Eoin F Fahy, Wisam Khider, Peter Kelly, Peter P Kearney, Ronan J Curtin, Conor O'Shea, Carl J Vaughan, Joseph A Eustace, Eugene P McFadden
BACKGROUND: Residual and significant postinfarction left ventricular (LV) dysfunction, despite technically successful percutaneous coronary intervention (PCI) for ST-elevation myocardial infarction (STEMI), remains an important clinical issue. In preclinical models, low-dose insulin-like growth factor 1 (IGF1) has potent cytoprotective and positive cardiac remodeling effects. We studied the safety and efficacy of immediate post-PCI low-dose intracoronary IGF1 infusion in STEMI patients...
June 2018: American Heart Journal
https://www.readbyqxmd.com/read/29898675/in-hospital-major-arrhythmias-arrhythmic-death-and-resuscitation-after-successful-primary-percutaneous-intervention-for-acute-transmural-infarction-a-retrospective-single-centre-cohort-study
#14
Marco Albanese, Korhan Alpaslan, Taoufik Ouarrak, Peter Merguet, Steffen Schneider, Wolfgang Schöls
BACKGROUND: Transmural acute myocardial infarction (AMI) is associated with a high risk for ventricular arrhythmia before, during and after treatment. Consequently, it is recommended that patients diagnosed with transmural AMI be monitored in a cardiac care unit (CCU) so life-threatening arrhythmias can be treated promptly. We examined the incidence and timing of in-hospital malignant ventricular arrhythmias, sudden cardiac or arrhythmic death (SCD/AD) and resuscitation requirements in patients with transmural AMI recovering from percutaneous coronary intervention (PCI) undertaken within 12 h of symptom onset and without antecedent thrombolysis...
June 14, 2018: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/29898017/cohort-of-patients-referred-for-brugada-syndrome-investigation-in-an-electrophysiology-service-19-year-registry
#15
Stefan Warpechowski Neto, Tiago Luiz Luz Leiria, Laura Lessa Gaudie Ley, Antonio Lessa Gaudie Ley, Luiza Zwan Dutra, Leonardo Martins Pires, Marcelo Lapa Kruse, Gustavo Glotz de Lima
BACKGROUND: Brugada syndrome (SBr) is an arrhythmic condition characterized by ST-T segment abnormalities in the right precordial leads associated with a high risk of ventricular arrhythmias and sudden death. Local data regarding the clinical characteristics of patients with a typical electrocardiographic (ECG) pattern undergoing electrophysiological study are scarce. OBJECTIVE: To evaluate patients with an ECG pattern suggestive of SBr referred for electrophysiological evaluation in a specialized center...
June 11, 2018: Arquivos Brasileiros de Cardiologia
https://www.readbyqxmd.com/read/29897909/electrocardiographic-abnormalities-in-chagas-disease-in-the-general-population-a-systematic-review-and-meta-analysis
#16
Lyda Z Rojas, Marija Glisic, Laura Pletsch-Borba, Luis E Echeverría, Wichor M Bramer, Arjola Bano, Najada Stringa, Asija Zaciragic, Bledar Kraja, Eralda Asllanaj, Rajiv Chowdhury, Carlos A Morillo, Oscar L Rueda-Ochoa, Oscar H Franco, Taulant Muka
BACKGROUND: Chagas disease (CD) is a major public health concern in Latin America and a potentially serious emerging threat in non-endemic countries. Although the association between CD and cardiac abnormalities is widely reported, study design diversity, sample size and quality challenge the information, calling for its update and synthesis, which would be very useful and relevant for physicians in non-endemic countries where health care implications of CD are real and neglected. We performed to systematically review and meta-analyze population-based studies that compared prevalence of overall and specific ECG abnormalities between CD and non-CD participants in the general population...
June 2018: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29897343/a-comparison-of-entropy-approaches-for-af-discrimination
#17
Chengyu Liu, Julien Oster, Erik Reinertsen, Qiao Li, Lina Zhao, Shamim Nemati, Gari D Clifford
This study focused on the comparison of single entropy measures for the ventricular response analysis-based AF detection. To enhance the performance of entropy-based AF detectors, we developed a normalized fuzzy entropy, &lt;i&gt;H&lt;/i&gt;&lt;sup&gt;θ&lt;/sup&gt;&lt;sub&gt;N&lt;/sub&gt; , a novel metric that: 1) uses a fuzzy function to determine vector similarity, 2) replaces probability estimation with density estimation for entropy approximation, 3) utilizes a flexible distance threshold parameter, and 4) adjusts for heart rate by subtracting the natural log value of the mean RR interval...
June 13, 2018: Physiological Measurement
https://www.readbyqxmd.com/read/29897149/atrial-involvement-in-arrhythmogenic-right-ventricular-cardiomyopathy-patients-referred-for-ventricular-arrhythmias-ablation
#18
Lingmin Wu, Jingru Bao, Erpeng Liang, Siyang Fan, Lihui Zheng, Zhongpeng Du, Gang Chen, Ligang Ding, Shu Zhang, Yan Yao
BACKGROUND: Arrhythmogenic right ventricular cardiomyopathy (ARVC) is a heritable myocardium disorder that predominantly affects the ventricle. Little is known about atrial involvement. This study aimed to assess atrial involvement, especially the role of genotype on atrium in ARVC. METHODS: The incidence, characterization and predictors of atrial involvement were investigated. Nine known ARVC-causing genes were screened and the correlation between genotype and atrial involvement was assessed...
June 13, 2018: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29897106/clinical-parameters-to-optimize-patient-selection-for-subcutaneous-and-transvenous-implantable-defibrillator-therapy
#19
Anne-Floor B E Quast, Tom F Brouwer, Fleur V Y Tjong, Arthur A M Wilde, Reinoud E Knops
BACKGROUND: The subcutaneous implantable cardioverter-defibrillator (S-ICD) lacks the antitachycardia pacing (ATP) capability of tranvenous ICDs (TV-ICD). S-ICD patient selection can be challenging as some patients may benefit from ATP. We aim to identify clinical predictors of ATP benefit, in order to improve patient selection for S-ICD or TV-ICD therapy. METHODS: De novo single- and dual-chamber TV-ICD patients implanted between March 2011 and December 2015 were included...
June 13, 2018: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29894017/arrhythmic-outcome-of-arrhythmogenic-right-ventricular-cardiomyopathy-patients-without-implantable-defibrillators
#20
Weijia Wang, Julia Cadrin Tourigny, Aditya Bhonsale, Crystal Tichnell, Brittney Murray, Oliver Monfredi, Jonathan Chrispin, Jane Crosson, Harikrishna Tandri, Cynthia A James, Hugh Calkins
BACKGROUND: Implantable defibrillators (ICD) are an important therapy for arrhythmogenic right ventricular cardiomyopathy (ARVC) patients at high risk of sudden death. Given the high appropriate ICD therapy rate, some have argued that the mere act of implanting an ICD inflates the malignant arrhythmia rate in ARVC. OBJECTIVE: To report the arrhythmic course of ARVC patients without ICDs at the fulfillment of the 2010 Task Force Criteria and explore predictors of malignant ventricular arrhythmias...
June 12, 2018: Journal of Cardiovascular Electrophysiology
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