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https://www.readbyqxmd.com/read/28912976/electromagnetic-interference-from-swimming-pool-generator-current-causing-inappropriate-icd-discharges
#1
Edward Samuel Roberto, Thein Tun Aung, Atif Hassan, Abdul Wase
Electromagnetic interference (EMI) includes any electromagnetic field signal that can be detected by device circuitry, with potentially serious consequences: incorrect sensing, pacing, device mode switching, and defibrillation. This is a unique case of extracardiac EMI by alternating current leakage from a submerged motor used to recycle chlorinated water, resulting in false rhythm detection and inappropriate ICD discharge. A 31-year-old female with arrhythmogenic right ventricular cardiomyopathy and Medtronic dual-chamber ICD placement presented after several inappropriate ICD shocks at the public swimming pool...
2017: Case Reports in Cardiology
https://www.readbyqxmd.com/read/28912205/epicardial-breakthrough-waves-during-sinus-rhythm-depiction-of-the-arrhythmogenic-substrate
#2
Elisabeth M J P Mouws, Eva A H Lanters, Christophe P Teuwen, Lisette J M E van der Does, Charles Kik, Paul Knops, Jos A Bekkers, Ad J J C Bogers, Natasja M S de Groot
BACKGROUND: Epicardial breakthrough waves (EBW) during atrial fibrillation are important elements of the arrhythmogenic substrate and result from endo-epicardial asynchrony, which also occurs to some degree during sinus rhythm (SR). We examined the incidence and characteristics of EBW during SR and its possible value in the detection of the arrhythmogenic substrate associated with atrial fibrillation. METHODS AND RESULTS: Intraoperative epicardial mapping (interelectrode distances 2 mm) of the right atrium, Bachmann's bundle, the left atrioventricular groove, and the pulmonary vein area was performed during SR in 381 patients (289 male, 67±10 years) with ischemic or valvular heart disease...
September 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28912187/pediatric-cardiomyopathies
#3
REVIEW
Teresa M Lee, Daphne T Hsu, Paul Kantor, Jeffrey A Towbin, Stephanie M Ware, Steven D Colan, Wendy K Chung, John L Jefferies, Joseph W Rossano, Chesney D Castleberry, Linda J Addonizio, Ashwin K Lal, Jacqueline M Lamour, Erin M Miller, Philip T Thrush, Jason D Czachor, Hiedy Razoky, Ashley Hill, Steven E Lipshultz
Pediatric cardiomyopathies are rare diseases with an annual incidence of 1.1 to 1.5 per 100 000. Dilated and hypertrophic cardiomyopathies are the most common; restrictive, noncompaction, and mixed cardiomyopathies occur infrequently; and arrhythmogenic right ventricular cardiomyopathy is rare. Pediatric cardiomyopathies can result from coronary artery abnormalities, tachyarrhythmias, exposure to infection or toxins, or secondary to other underlying disorders. Increasingly, the importance of genetic mutations in the pathogenesis of isolated or syndromic pediatric cardiomyopathies is becoming apparent...
September 15, 2017: Circulation Research
https://www.readbyqxmd.com/read/28912183/arrhythmogenic-cardiomyopathy
#4
REVIEW
Domenico Corrado, Cristina Basso, Daniel P Judge
Arrhythmogenic cardiomyopathy is an inherited heart muscle disorder, predisposing to sudden cardiac death, particularly in young patients and athletes. Pathological features include loss of myocytes and fibrofatty replacement of right ventricular myocardium; biventricular involvement is often observed. It is a cell-to-cell junction cardiomyopathy, typically caused by genetically determined abnormalities of cardiac desmosomes, which leads to detachment of myocytes and alteration of intracellular signal transduction...
September 15, 2017: Circulation Research
https://www.readbyqxmd.com/read/28902650/a-rare-cause-of-cyanosis-and-hypoxia-that-should-not-be-forgotten-after-implantable-cardioverter-defibrillator-implantation
#5
Uğur Canpolat, Nihan Bahadır, Levent Şahiner, Kudret Aytemir
Transvenous pacemaker or implantable cardioverter defibrillator (ICD) implantation procedures are usually performed under local anesthetic, and prilocaine is the most common agent to be used. The data regarding methemoglobinemia after cardiac device implantation are scarce. Thus, presently described is the case of a 47-year-old female patient with arrhythmogenic right ventricular cardiomyopathy/dysplasia who underwent ICD implantation for secondary prophylaxis and developed cyanosis as a result of prilocaine-associated methemoglobinemia...
September 2017: Türk Kardiyoloji Derneği Arşivi: Türk Kardiyoloji Derneğinin Yayın Organıdır
https://www.readbyqxmd.com/read/28901675/sudden-cardiac-death-in-isolated-right-ventricular-hypertrabeculation-noncompaction-cardiomyopathy
#6
Soad Bekheit, Boutros Karam, Farshid Daneshvar, Julie Zaidan, Rabih Tabet, Jonathan Spagnola, James Lafferty
Hypertrabeculation/noncompaction of the myocardium is a rare disorder that involves most commonly the left ventricle of the heart and it has been recognized as a distinct cardiomyopathy by the World Health Organization. However, it is extremely rare for this condition to involve exclusively the right ventricle. We report the cases of three patients who presented with ventricular tachyarrhythmia and sudden cardiac death. They were found to have isolated right ventricular hypertrabeculation/noncompaction on echocardiography...
September 12, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28901586/long-term-effects-of-cardiac-resynchronization-therapy-on-electrical-remodeling-in-heart-failure-a-prospective-study
#7
Bharatraj Banavalikar, Anees Thajudeen, Narayanan Namboodiri, Krishna Kumar Mohanan Nair, Abhilash Srivilasam Pushpangadhan, Ajit Kumar Valaparambil
INTRODUCTION: Effects of cardiac resynchronization therapy (CRT) on arrhythmogenicity and sudden death have not been fully ascertained. CRT has been shown to increase transmural dispersion of repolarization (TDR) immediately on implantation, that may favorably remodel on long-term follow-up. However, such a hypothesis has not been prospectively evaluated. METHODS AND RESULTS: We included 35 consecutive patients who underwent CRT implantation between September 2013 & August 2014 (mean age 56...
September 13, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28895994/asymptomatic-course-of-arrhythmogenic-right-ventricular-cardiomyopathy
#8
Agnieszka Sioma, Łukasz Mazurkiewicz, Magdalena Marczak, Ewa Kucharczyk-Petryka, Jacek Grzybowski
No abstract text is available yet for this article.
2017: Kardiologia Polska
https://www.readbyqxmd.com/read/28878587/arrhythmogenic-right-ventricular-cardiomyopathy-in-an-endurance-athlete-presenting-with-ventricular-tachycardia-and-normal-right-ventricular-function
#9
Jeffrey S Hedley, Ibhar Al Mheid, Zoubin Alikhani, Maria A Pernetz, Jonathan H Kim
Arrhythmogenic right ventricular cardiomyopathy, a genetically inherited disease that results in fibrofatty replacement of normal cardiac myocytes, has been associated with sudden cardiac death in athletes. Long-term participation in endurance exercise hastens the development of both the arrhythmic and structural arrhythmogenic right ventricular cardiomyopathy phenotypes. We describe the unusual case of a 34-year-old, symptomatic, female endurance athlete who had arrhythmogenic right ventricular cardiomyopathy in the presence of a structurally normal right ventricle...
August 2017: Texas Heart Institute Journal
https://www.readbyqxmd.com/read/28874384/heart-failure-is-common-and-under-recognized-in-patients-with-arrhythmogenic-right-ventricular-cardiomyopathy-dysplasia
#10
Nisha A Gilotra, Aditya Bhonsale, Cynthia A James, Anneline S J Te Riele, Brittney Murray, Crystal Tichnell, Abhishek Sawant, Chin Siang Ong, Daniel P Judge, Stuart D Russell, Hugh Calkins, Ryan J Tedford
BACKGROUND: Heart failure (HF) prevalence in arrhythmogenic right ventricular cardiomyopathy/dysplasia (ARVC/D) varies depending on study cohort and is not well characterized. This study sought to determine prevalence and predictors of HF in ARVC/D. METHODS AND RESULTS: Clinical HF, defined as at least 1 HF sign or symptom, was retrospectively adjudicated for 289 patients meeting ARVC/D Task Force Criteria. HF was present in 142 patients (49%): 113 had isolated RV involvement and 29 had evidence of LV dysfunction...
September 2017: Circulation. Heart Failure
https://www.readbyqxmd.com/read/28865556/normative-reference-values-of-right-heart-in-competitive-athletes-a-systematic-review-and-meta-analysis
#11
REVIEW
Flavio D'Ascenzi, Antonio Pelliccia, Marco Solari, Pietro Piu, Ferdinando Loiacono, Francesca Anselmi, Stefano Caselli, Marta Focardi, Marco Bonifazi, Sergio Mondillo
Training-induced right ventricular (RV) enlargement is frequent in athletes. Unfortunately, RV dilatation is also a common phenotypic expression and one of the diagnostic criteria of arrhythmogenic RV cardiomyopathy (ARVC). The current echocardiographic reference values derived from the general population can overestimate the presence of RV dilatation in athletes. We performed a meta-analysis of the literature to derive the proper reference values for assessing RV enlargement in competitive athletes. We conducted systematic review of English-language studies in the MEDLINE, Scopus, and Cochrane databases investigating RV size and function by echocardiography and by cardiac magnetic resonance (CMR) in competitive athletes...
September 2017: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/28863780/feature-tracking-cmr-reveals-abnormal-strain-in-preclinical-arrhythmogenic-right-ventricular-dysplasia-cardiomyopathy-a-multisoftware-feasibility-and-clinical-implementation-study
#12
Mimount Bourfiss, Davis M Vigneault, Mounes Aliyari Ghasebeh, Brittney Murray, Cynthia A James, Crystal Tichnell, Firdaus A Mohamed Hoesein, Stefan L Zimmerman, Ihab R Kamel, Hugh Calkins, Harikrishna Tandri, Birgitta K Velthuis, David A Bluemke, Anneline S J M Te Riele
BACKGROUND: Regional right ventricular (RV) dysfunction is the hallmark of Arrhythmogenic Right Ventricular Dysplasia/Cardiomyopathy (ARVD/C), but is currently only qualitatively evaluated in the clinical setting. Feature Tracking Cardiovascular Magnetic Resonance (FT-CMR) is a novel quantitative method that uses cine CMR to calculate strain values. However, most prior FT-CMR studies in ARVD/C have focused on global RV strain using different software methods, complicating implementation of FT-CMR in clinical practice...
September 1, 2017: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/28857927/arrhythmogenic-right-ventricular-cardiomyopathy-and-cardiac-microvascular-disease-a-rare-association-or-a-possible-link
#13
Giovanni B Forleo, Francesco Summaria, Domenico G Della Rocca, Chiara Lanzillo, Fabio Ticconi, Domenico Sergi, Luca Santini, Francesco Romeo
No abstract text is available yet for this article.
October 2017: Journal of Cardiovascular Medicine
https://www.readbyqxmd.com/read/28855434/isolated-late-activation-detected-by-magnetocardiography-predicts-future-lethal-ventricular-arrhythmic-events-in-patients-with-arrhythmogenic-right-ventricular-cardiomyopathy
#14
Yoshitaka Kimura, Hiroshi Takaki, Yuko Y Inoue, Yasutaka Oguchi, Tomomi Nagayama, Takahiro Nakashima, Shoji Kawakami, Satoshi Nagase, Takashi Noda, Takeshi Aiba, Wataru Shimizu, Shiro Kamakura, Masaru Sugimachi, Satoshi Yasuda, Hiroaki Shimokawa, Kengo Kusano
BACKGROUND: Risk stratification of ventricular arrhythmias is vital to the optimal management in patients with arrhythmogenic right ventricular cardiomyopathy (ARVC). We hypothesized that 64-channel magnetocardiography (MCG) would be useful to detect isolated late activation (ILA) by overcoming the limitations of conventional noninvasive predictors of ventricular tachyarrhythmias, including epsilon waves, late potential (LP), and right ventricular ejection fraction (RVEF), in ARVC patients...
August 30, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28843747/arrhythmogenic-right-ventricular-cardiomyopathy-arvc-in-a-young-female-athlete-at-36-weeks-gestation-a-case-report
#15
Hae Yoon Grace Choung, Monika Vyas, Daniel Jacoby, Brian West
A 26year old east African professional athlete presented to the obstetric clinic for a routine visit at 36 weeks gestation. She had a history of Right Ventricular Outflow Tract - Ventricular Tachycardia (RVOT-VT) with an episode of cardiac arrest in the past, and had been treated with ablation 4 years earlier. Her current visit was uneventful, her pregnancy progressing normally. Following the visit she went to a local restaurant where she suffered a cardiac arrest that was unresponsive to therapy. Chest compressions were continued from the time of her collapse until an emergency caesarian section was performed, delivering a healthy female infant...
July 25, 2017: Pathology, Research and Practice
https://www.readbyqxmd.com/read/28842915/roles-of-impaired-intracellular-calcium-cycling-in-arrhythmogenicity-of-diabetic-mouse-model
#16
Chung-Chuan Chou, Chien-Te Ho, Hui-Ling Lee, Yen Chu, Tzung-Hai Yen, Ming-Shien Wen, Shien-Fong Lin, Cheng-Hung Lee, Po-Cheng Chang
BACKGROUND: Diabetes mellitus is associated an increased risk of ventricular arrhythmias (VA), but the underlying electrophysiological mechanisms are not fully explored. This study was aimed to test whether dynamic factors and Cai handling play roles in arrhythmogenesis of a diabetic animal model. METHODS: We used 26 db/db type 2 diabetes mice and 28 control mice in this study. VA inducibility was evaluated in vivo under isoflurane general anesthesia. The intracellular Ca(2+) (Cai ) and membrane voltage (Vm ) signals of the Langendorff-perfused mouse hearts were simultaneously recorded using the optical mapping technique...
August 26, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28838546/p-wave-and-the-substrates-of-arrhythmias-originating-in%C3%A2-the%C3%A2-atria
#17
REVIEW
Giuseppe Bagliani, Fabio Leonelli, Luigi Padeletti
The sinus node is the primary cardiac pacemaker from which the wavefront of activation proceeds through bundles of atrial fibers to the atrioventricular node. Left atrial activation proceeds along the Bachmann bundle and lower right atrium, determining P-wave morphology. Electrocardiogram reveals ectopic or retrograde atrial activation, wandering pacemaker activity, or artificial pacemaker-mediated atrial depolarization. Vectorcardiography and transesophageal recording are complementary methods. Atrial anatomic structure and automatic cells outside the sinus node constitute the mechanisms of focal and reentrant atrial arrhythmias...
September 2017: Cardiac Electrophysiology Clinics
https://www.readbyqxmd.com/read/28818065/case-reports-of-two-pedigrees-with-recessive-arrhythmogenic-right-ventricular-cardiomyopathy-associated-with-homozygous-thr335ala-variant-in-dsg2
#18
Sami Qadri, Olli Anttonen, Juho Viikilä, Eija H Seppälä, Samuel Myllykangas, Tero-Pekka Alastalo, Miia Holmström, Tiina Heliö, Juha W Koskenvuo
BACKGROUND: Arrhythmogenic right ventricular cardiomyopathy (ARVC) is an inherited cardiac disease, involving changes in ventricular myocardial tissue and leading to fatal arrhythmias. Mutations in desmosomal genes are thought to be the main cause of ARVC. However, the exact molecular genetic etiology of the disease still remains largely inconclusive, and this along with large variabilities in clinical manifestations complicate clinical diagnostics. CASE PRESENTATION: We report two families (n = 20) in which a desmoglein-2 (DSG2) missense variant c...
August 17, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/28810115/current-guidelines-on-syncope
#19
Maheedhar Gedela, Naveen Rajpurohit, Kashif A Shaikh, Muhammad Omar, Scott Pham
Syncope is a very commonly encountered clinical problem in general practice and in the emergency department. In the evaluation of syncope, it is important to identify the specific cause to determine the treatment, to estimate the precise risk to a patient, and to reduce recurrence. Sometimes, making a diagnosis of syncope is difficult, as different mechanisms may often coexist. Syncope causes a significant impact on quality of life due to associated risk of physical injury. In particular, syncope can be a precursor to sudden cardiac death in patients with underlying cardiac disease...
November 2016: South Dakota Medicine: the Journal of the South Dakota State Medical Association
https://www.readbyqxmd.com/read/28804970/arrhythmogenic-gene-remodelling-in-elderly-patients-with-type-2-diabetes-with-aortic-stenosis-and-normal-left-ventricular-ejection-fraction
#20
R Ashrafi, P Modi, A Y Oo, D M Pullan, K Jian, H Zhang, J Yanni Gerges, G Hart, M R Boyett, G K Davis, J P H Wilding
Type 2 diabetes is associated with higher rate of ventricular arrhythmias and this is hypothesised to be independent of coronary artery disease or hypertension. To investigate further we compared changes in left ventricular myocardial gene expression in Type 2 diabetes to patients in a control group with left ventricular hypertrophy. 9 control patients and 7 patients with type 2 diabetes with aortic stenosis undergoing aortic valve replacement had standard ECGs, signal averaged ECGs and echocardiograms prior to surgery...
August 14, 2017: Experimental Physiology
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