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https://www.readbyqxmd.com/read/29036652/adapting-detection-sensitivity-based-on-evidence-of-irregular-sinus-arrhythmia-to-improve-atrial-fibrillation-detection-in-insertable-cardiac-monitors
#1
Helmut Pürerfellner, Prashanthan Sanders, Shantanu Sarkar, Erin Reisfeld, Jerry Reiland, Jodi Koehler, Evgeny Pokushalov, Luboš Urban, Lukas R C Dekker
Aims: Intermittent change in p-wave discernibility during periods of ectopy and sinus arrhythmia is a cause of inappropriate atrial fibrillation (AF) detection in insertable cardiac monitors (ICM). To address this, we developed and validated an enhanced AF detection algorithm. Methods and results: Atrial fibrillation detection in Reveal LINQ ICM uses patterns of incoherence in RR intervals and absence of P-wave evidence over a 2-min period. The enhanced algorithm includes P-wave evidence during RR irregularity as evidence of sinus arrhythmia or ectopy to adaptively optimize sensitivity for AF detection...
October 3, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/29036559/the-brisk-standing-test-for-long-qt-syndrome-in-prepubertal-school-children-defining-normal
#2
L H P M Filippini, P G Postema, K Zoubin, B J M Hermans, N A Blom, T Delhaas, A A M Wilde
Aims: Long QT syndrome (LQTS) is associated with malignant arrhythmias and sudden death from birth to advanced age. Prolongation of the QT-interval, may however be concealed on standard electrocardiograms (ECG). The brisk-standing-test (BST) was developed to guide LQTS-diagnosis and treatment in adults. We hypothesized that the BST may be used in prepubertal children to identify LQTS subjects. Accordingly, reference values for the BST should be available to prevent incorrect diagnosis and treatment of LQTS...
October 3, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/29036525/circulating-micrornas-in-arrhythmogenic-right-ventricular-cardiomyopathy-with-ventricular-arrhythmia
#3
Shinya Yamada, Ya-Wen Hsiao, Shih-Lin Chang, Yenn-Jiang Lin, Li-Wei Lo, Fa-Po Chung, Shuo-Ju Chiang, Yu-Feng Hu, Ta-Chuan Tuan, Tze-Fan Chao, Jo-Nan Liao, Chin-Yu Lin, Yao-Ting Chang, Abigail Louise D Te, Yung-Nan Tsai, Shih-Ann Chen
Aims: MicroRNAs (miRNAs) have been implicated in cardiac diseases. This study aimed to characterize the circulating miRNAs in patients with arrhythmogenic right ventricular cardiomyopathy (ARVC) and correlate the miRNAs with the clinical outcomes of ARVC. Methods and results: This study included 62 patients with ventricular arrhythmia (VA): 28 patients (45%) had definite ARVC, 11 (18%) had borderline or possible ARVC, and 23 (37%) had idiopathic ventricular tachycardia (VT)...
September 25, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/29035846/current-perspectives-and-practices-on-chronic-total-occlusion-percutaneous-coronary-interventions
#4
Siddharth M Patel, Rohan V Menon, M Nicolas Burke, Farouc A Jaffer, Robert W Yeh, Minh Vo, Dimitri Karmpaliotis, Lorenzo Azzalini, Mauro Carlino, Kambis Mashayekhi, Alfredo R Galassi, Stephane Rinfret, Stephen G Ellis, Mitul Patel, Bavana V Rangan, Aris Karatasakis, Barbara A Danek, Judit Karacsonyi, Erica Resendes, Subhash Banerjee, Emmanouil S Brilakis
OBJECTIVES: We sought to examine contemporary perspectives and practices on chronic total occlusion (CTO) percutaneous coronary intervention (PCI). BACKGROUND: The frequency and success of CTO-PCI have been increasing in recent years. METHODS: An online questionnaire was created and distributed to cardiologists within the United States and internationally. RESULTS: A total of 1149 responses were obtained. The United States (n = 845; 73...
October 15, 2017: Journal of Invasive Cardiology
https://www.readbyqxmd.com/read/29035207/novel-quantitative-analytical-approaches-for-rotor-identification-and-associated-implications-for-mapping
#5
Elizabeth M Annoni, Shivaram Poigai Arunachalam, Suraj Kapa, Siva K Mulpuru, Paul A Friedman, Elena G Talkachova
OBJECTIVE: Clinical studies identifying rotors confirming these sites for ablation in treating cardiac arrhythmias have had inconsistent results with the current analysis techniques available. The aim of this study is to evaluate four new signal analysis approaches - multiscale frequency (MSF), Shannon entropy (SE), Kurtosis (Kt), and multiscale entropy (MSE) - in their ability to identify the pivot point of rotors. METHODS: Optical mapping movies of ventricular tachycardia were used to evaluate the performance and robustness of SE, Kt, MSF and MSE techniques with respect to several clinical limitations: decreased time duration, reduced spatial resolution, and the presence of meandering rotors...
October 16, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/29035186/left-ventricular-noncompaction-cardiomyopathy-and-recurrent-polymorphic-ventricular-tachycardia-a-case-report-and-literature-review
#6
Oluwaseun A Akinseye, Uzoma N Ibebuogu, Sunil K Jha
INTRODUCTION: Noncompaction cardiomyopathy is a rare phenotype of cardiomyopathy associated with severe cardiac arrhythmia and thromboembolic complications. CASE PRESENTATION: A 55-year-old woman presented with frank pulmonary edema and received a diagnosis of noncompaction cardiomyopathy. DISCUSSION: Left ventricular noncompaction cardiomyopathy is increasingly being diagnosed because of advances in imaging modalities. It is important to differentiate this new phenotype of cardiomyopathy from others because its diagnosis, management, and prognosis differ...
2017: Permanente Journal
https://www.readbyqxmd.com/read/29034898/generation-of-induced-pluripotent-stem-cells-ipsc-from-an-atrial-fibrillation-patient-carrying-a-pitx2-p-m200v-mutation
#7
Cristina Mora, Marialaura Serzanti, Alessio Giacomelli, Silvia Beltramone, Eleonora Marchina, Valeria Bertini, Giovanna Piovani, Lena Refsgaard, Morten Salling Olesen, Venusia Cortellini, Patrizia Dell'Era
Atrial fibrillation (AF) is the most common sustained arrhythmia associated with several cardiac risk factors, but increasing evidences indicated a genetic component. Indeed, genetic variations of the specific PITX2 gene have been identified in patients with early-onset AF. To investigate the molecular mechanisms underlying AF, we reprogrammed to pluripotency polymorphonucleated leukocytes isolated from the blood of a patient carrying a PITX2 p.M200V mutation, using a commercially available non-integrating expression system...
October 2017: Stem Cell Research
https://www.readbyqxmd.com/read/29034891/generation-of-induced-pluripotent-stem-cells-ipsc-from-an-atrial-fibrillation-patient-carrying-a-kcna5-p-d322h-mutation
#8
Cristina Mora, Marialaura Serzanti, Alessio Giacomelli, Valentina Turco, Eleonora Marchina, Valeria Bertini, Giovanna Piovani, Giulia Savio, Lena Refsgaard, Morten Salling Olesen, Venusia Cortellini, Patrizia Dell'Era
Atrial fibrillation (AF) is the most common sustained arrhythmia associated with several cardiac risk factors, but increasing evidences indicated a genetic component. Indeed, genetic variations of the atrial specific KCNA5 gene have been identified in patients with early-onset lone AF. To investigate the molecular mechanisms underlying AF, we reprogrammed to pluripotency polymorphonucleated leukocytes isolated from the blood of a patient carrying a KCNA5 p.D322H mutation, using a commercially available non-integrating system...
October 2017: Stem Cell Research
https://www.readbyqxmd.com/read/29034783/cerebral-and-limb-tissue-oxygenation-during-peripheral-venoarterial-extracorporeal-life-support
#9
Nousjka P A Vranken, Anouk A M A Lindelauf, Antoine P Simons, Marcel J H Ariës, Jos G Maessen, Patrick W Weerwind
Femoral access in extracorporeal life support (ECLS) has been associated with regional variations in arterial oxygen saturation, potentially predisposing the patient to ischemic tissue damage. Current monitoring techniques, however, are limited to intermittent bedside evaluation of capillary refill among other factors. The aim of this study was to assess whether cerebral and limb regional tissue oxygen saturation (rSO2) values reflect changes in various patient-related parameters during venoarterial ECLS (VA-ECLS)...
January 1, 2017: Journal of Intensive Care Medicine
https://www.readbyqxmd.com/read/29034462/a-model-based-cluster-analysis-of-maternal-emotion-regulation-and-relations-to-parenting-behavior
#10
Anne Shaffer, Monica Whitehead, Molly Davis, Diana Morelen, Cynthia Suveg
In a diverse community sample of mothers (N = 108) and their preschool-aged children (Mage  = 3.50 years), this study conducted person-oriented analyses of maternal emotion regulation (ER) based on a multimethod assessment incorporating physiological, observational, and self-report indicators. A model-based cluster analysis was applied to five indicators of maternal ER: maternal self-report, observed negative affect in a parent-child interaction, baseline respiratory sinus arrhythmia (RSA), and RSA suppression across two laboratory tasks...
October 15, 2017: Family Process
https://www.readbyqxmd.com/read/29033721/an-audit-of-in-hospital-cardiopulmonary-resuscitation-in-a-teaching-hospital-in-saudi-arabia-a-retrospective-study
#11
Abdullah Mohammed Kaki, Kamal Waheeb Alghalayini, Mohamed Nabil Alama, Adnan Abdullah Almazroaa, Norah Abdullah A Khathlan, Hassan Sembawa, Beena M Ouseph
OBJECTIVES: Data reflecting cardiopulmonary resuscitation (CPR) efforts in Saudi Arabia are limited. In this study, we analyzed the characteristics, and estimated the outcome, of in-hospital CPR in a teaching hospital in Saudi Arabia over 4 years. METHODS: A retrospective, observational study was conducted between January 2009 and December 2012 and included 4361 patients with sudden cardiopulmonary arrest. Resuscitation forms were reviewed. Demographic data, resuscitation characteristics, and survival outcomes were recorded...
October 2017: Saudi Journal of Anaesthesia
https://www.readbyqxmd.com/read/29033573/ten-year-outcome-of-intraoperative-treatment-of-atrial-fibrillation-using-radiofrequency-ablation
#12
Nour Boulad, Nicolas W Shammas, Gerald Early, Shauna Roberts, Gail A Shammas, Yuhning Linda Hu, Holly Park, Michael Jerin
BACKGROUND: Intraoperative radiofrequency ablation (RFA) has been advocated to treat atrial fibrillation (AF). This report examines the long-term effects of intraoperative RFA in the prevention of recurrence of AF when used as an adjunctive treatment in patients undergoing cardiac procedures for primary indications unrelated to their arrhythmia. METHODS: The study reviewed the records of patients from a tertiary medical center which had 2 cardiac surgeons performing an intraoperative adjunctive RFA procedure...
2017: Therapeutics and Clinical Risk Management
https://www.readbyqxmd.com/read/29033511/changes-of-atrial-natriuretic-peptides-after-defibrillation-threshold-testing-predicted-future-ventricular-arrhythmia-event
#13
Po-Ching Chi, Jen-Yuan Kuo, Chun-Yen Chen, An-Mei Wang, Chung-Lieh Hung, Sheng-Hsiung Chang, Bing-Fu Shih, Hung-I Yeh
BACKGROUND: We investigated the change of natriuretic peptides during defibrillation threshold (DFT) testing and its relationship with future ventricular arrhythmia (VA) events in patients implanted with an implantable cardioverter defibrillator (ICD). METHODS: Atrial natriuretic peptide (ANP), brain natriuretic peptide (BNP), and c-type natriuretic peptide (CNP) were measured in 21 patients (mean age 61 ± 13 years; 67% male) undergoing ICD implantation. Blood samples of the patients were drawn at pre-implantation, 30 minutes, 60 minutes, and 24 hours after DFT testing...
July 2017: Acta Cardiologica Sinica
https://www.readbyqxmd.com/read/29033053/identification-and-characterization-of-a-novel-recessive-kcnq1-mutation-associated-with-romano-ward-long-qt-syndrome-in-two-iranian-families
#14
Zahra Zafari, Mohammad Dalili, Sirus Zeinali, Siamak Saber, Amir Farjam Fazeli Far, Mohammad Taghi Akbari
BACKGROUND: One of the foremost causes of sudden cardiac death in the young is an inherent cardiac arrhythmia known as Long-QT syndrome (LQTS). Whereas heterozygous mutations typically lead to the Romano-Ward type of LQTS, We have provided a further evidence for the recessive transmission of a novel KCNQ1 gene mutation in two consanguineous families for the first time in Iran. METHODS: Next generation sequencing, DNA Sanger sequencing and haplotype analysis were performed for genotype determination...
July 12, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/29032884/the-genetics-underlying-idiopathic-ventricular-fibrillation-a-special-role-for-catecholaminergic-polymorphic-ventricular-tachycardia
#15
Jaakko T Leinonen, Lia Crotti, Aurora Djupsjöbacka, Silvia Castelletti, Nella Junna, Alice Ghidoni, Annukka M Tuiskula, Carla Spazzolini, Federica Dagradi, Matti Viitasalo, Kimmo Kontula, Maria-Christina Kotta, Elisabeth Widén, Heikki Swan, Peter J Schwartz
BACKGROUND: Ventricular fibrillation (VF) is a major cause of sudden cardiac death. In some cases clinical investigations fail to identify the underlying cause and the event is classified as idiopathic (IVF). Since mutations in arrhythmia-associated genes frequently determine arrhythmia susceptibility, screening for disease-predisposing variants could improve IVF diagnostics. METHODS AND RESULTS: The study included 76 Finnish and Italian patients with a mean age of 31...
October 5, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/29032346/fusion-of-anthopleurin-b-to-aav2-increases-specificity-of-cardiac-gene-transfer
#16
J Emanuel Finet, Xiaoping Wan, J Kevin Donahue
AAV-mediated gene therapy has become a promising therapeutic strategy for chronic diseases. Its clinical utilization, however, is limited by the potential risk of off-target effects. In this work we attempt to overcome this challenge, hypothesizing that cardiac ion channel-specific ligands could be fused onto the AAV capsid, and narrow its tropism to cardiac myocytes. We successfully fused the cardiac sodium channel (Nav1.5)-binding toxin Anthopleurin-B onto the AAV2 capsid without compromising virus integrity, and demonstrated increased specificity of cardiomyocyte attachment...
October 11, 2017: Virology
https://www.readbyqxmd.com/read/29030919/baseline-fragmented-qrs-increases-the-risk-of-major-arrhythmic-events-in-brugada-syndrome-systematic-review-and-meta-analysis
#17
Pattara Rattanawong, Tanawan Riangwiwat, Narut Prasitlumkum, Nath Limpruttidham, Napatt Kanjanahattakij, Pakawat Chongsathidkiet, Wasawat Vutthikraivit, Eugene H Chung
BACKGROUND: Fragmented QRS reflects disturbances in the myocardium predisposing the heart to ventricular tachyarrhythmias. Recent studies suggest that fragmented QRS (fQRS) is associated with major arrhythmic events in Brugada syndrome. However, a systematic review and meta-analysis of the literature has not been done. We assessed the association between fQRS and major arrhythmic events in Brugada syndrome by a systematic review of the literature and a meta-analysis. METHODS: We comprehensively searched the databases of MEDLINE and EMBASE from inception to May 2017...
October 14, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/29030566/unobtrusive-nocturnal-heartbeat-monitoring-by-a-ballistocardiographic-sensor-in-patients-with-sleep-disordered-breathing
#18
Matthias Daniel Zink, Christoph Brüser, Björn-Ole Stüben, Andreas Napp, Robert Stöhr, Steffen Leonhardt, Nikolaus Marx, Karl Mischke, Jörg B Schulz, Johannes Schiefer
Sleep disordered breathing (SDB) is known for fluctuating heart rates and an increased risk of developing arrhythmias. The current reference for heartbeat analysis is an electrocardiogram (ECG). As an unobtrusive alternative, we tested a sensor foil for mechanical vibrations to perform a ballistocardiography (BCG) and applied a novel algorithm for beat-to-beat cycle length detection. The aim of this study was to assess the correlation between beat-to-beat cycle length detection by the BCG algorithm and simultaneously recorded ECG...
October 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29030237/contact-force-sensing-for-ablation-of-persistent-atrial-fibrillation-a-randomized-multicenter-trial
#19
Sergio Conti, Rukshen Weerasooriya, Paul Novak, Jean Champagne, Hong Euy Lim, Laurent Macle, Yaariv Khaykin, Alfredo Pantano, Atul Verma
BACKGROUND: Impact of contact force sensing (CFS) on ablation of persistent atrial fibrillation (PeAF) is unknown. OBJECTIVE: The TOUCH AF randomized trial compared CFS guided ablation to a CFS blinded strategy. METHODS: Patients (n=128) undergoing first-time ablation for persistent AF were randomized to a CFS guided vs CFS blinded strategy. In the CFS guided procedure, operators visualized real-time force data; in the blinded procedure, force data was hidden...
October 10, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/29030236/long-term-aerobic-exercise-in-calsequestrin2-knockout-mice-accentuates-vagal-antagonism-during-%C3%AE-adrenergic-stimulation-which-restricts-heart-rate-acceleration-and-paradoxically-increases-abnormal-ryanodine-receptor-calcium-leak-in-ventricular-myocytes
#20
Hsiang-Ting Ho, Senthil Thambidorai, Björn C Knollmann, George E Billman, Sandor Györke, Anuradha Kalyanasundaram
BACKGROUND: Long-term aerobic exercise (EX) alters autonomic balance which may not be favorable in heart rate (HR) dependent arrhythmic diseases including Catecholaminergic Polymorphic Ventricular Tachycardia (CPVT) due to preexisting bradycardia and increased sensitivity to parasympathetic stimulation. OBJECTIVE: The purpose of this study was to determine if long-term exercise-induced autonomic adaptations modify CPVT susceptibility. METHODS: We determined exercise-induced parasympathetic effects on HR, arrhythmia incidence and intracellular sarcoplasmic reticulum (SR) Ca(2+) leak in atrial (ACM) and ventricular (VCM) cardiomyocytes, in EX Calsequestrin knockout (CASQ2(-/-)) mice, a model of CPVT...
October 10, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
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