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Atrial defibrilation

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https://www.readbyqxmd.com/read/28079110/left-ventricular-noncompaction-cardiomyopathy-cardiac-neuromuscular-and-genetic-factors
#1
REVIEW
Josef Finsterer, Claudia Stöllberger, Jeffrey A Towbin
Left ventricular hypertrabeculation (LVHT) or noncompaction is a myocardial abnormality of unknown aetiology, frequently associated with monogenic disorders, particularly neuromuscular disorders, or with chromosomal defects. LVHT is diagnosed usually by echocardiography by the presence of a bilayered myocardium consisting of a thick, spongy, noncompacted endocardial layer and a thin, compacted, epicardial layer. The pathogenesis of LVHT is unsolved, and the diagnostic criteria, prognosis, and optimal treatment of patients with LVHT are under debate...
January 12, 2017: Nature Reviews. Cardiology
https://www.readbyqxmd.com/read/28064156/high-prevalence-of-baffle-leaks-in-adults-after-atrial-switch-operations-for-transposition-of-the-great-arteries
#2
Gabriella De Pasquale, Francesca Bonassin Tempesta, Bruno Santos Lopes, Daniela Babic, Angela Oxenius, Theresa Seeliger, Christiane Gruner, Felix C Tanner, Patric Biaggi, Christine Attenhofer Jost, Matthias Greutmann
AIMS: To determine the prevalence of baffle leaks in adults after atrial switch operations for transposition of the great arteries, as these may predispose to paradoxical embolic events, particularly in patients with transvenous pacemaker or defibrillator leads. METHODS AND RESULTS: We routinely perform contrast echocardiography with agitated saline in all patients after atrial switch operations. For this study, we analysed patients who had saline contrast echocardiography between 2010 and 2012...
January 6, 2017: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/27989789/very-high-rate-programming-in-primary-prevention-patients-with-reduced-ejection-fraction-implanted-with-a-defibrillator-results-from-a-large-multicenter-controlled-study
#3
Nicolas Clementy, Farid Challal, Eloi Marijon, Serge Boveda, Pascal Defaye, Christophe Leclercq, Jean-Claude Deharo, Nicolas Sadoul, Didier Klug, Olivier Piot, Daniel Gras, Pierre Bordachar, Vincent Algalarrondo, Laurent Fauchier, Dominique Babuty
BACKGROUND: Programming implantable cardioverter defibrillators (ICD) with a high-rate therapy strategy has proven to be effective in reducing shocks, and is associated with a reduced mortality. OBJECTIVE: We sought to determine the impact of a very-high-rate cutoff programming strategy on outcomes in patients with a primary indication for an ICD due to reduced left ventricular ejection fraction. METHODS: Using data from the French multicenter DAI-PP registry, this cohort-controlled study compared outcomes in 500 patients programmed with a very-high-rate cutoff (VH-RATE group: monitor zone 170-219 beats per minute, VF zone ≥220 beats per minute with 13±4 detection intervals) with 1,500 matched control patients programmed with 1 or 2 therapy zone...
October 28, 2016: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/27956005/differences-between-access-to-follow-up-care-and-inappropriate-shocks-based-on-insurance-status-of-implantable-cardioverter-defibrillator-recipients
#4
Solomon J Sager, Chris Healy, Archana Ramireddy, Harold Rivner, Juan F Viles Gonzalez, James O Coffey, Natalia Rossin, Ka M Lo, Jeffrey J Goldberger, Robert J Myerburg, Raul D Mitrani
Differences in implantable cardioverter defibrillator (ICD) utilization based on insurance status have been described, but little is known about postimplant follow-up patterns associated with insurance status and outcomes. We collected demographic, clinical, and device data from 119 consecutive patients presenting with ICD shocks. Insurance status was classified as uninsured/Medicaid (uninsured) or private/Health Maintenance Organization /Medicare (insured). Shock frequencies were analyzed before and after a uniform follow-up pattern was implemented regardless of insurance profile...
November 16, 2016: American Journal of Cardiology
https://www.readbyqxmd.com/read/27931611/arrhythmogenic-right-ventricular-cardiomyopathy-clinical-course-and-predictors-of-arrhythmic-risk
#5
Andrea Mazzanti, Kevin Ng, Alessandro Faragli, Riccardo Maragna, Elena Chiodaroli, Nicoletta Orphanou, Nicola Monteforte, Mirella Memmi, Patrick Gambelli, Valeria Novelli, Raffaella Bloise, Oronzo Catalano, Guido Moro, Valentina Tibollo, Massimo Morini, Riccardo Bellazzi, Carlo Napolitano, Vincenzo Bagnardi, Silvia G Priori
BACKGROUND: Arrhythmogenic right ventricular cardiomyopathy (ARVC) is a leading cause of sudden cardiac death, but its progression over time and predictors of arrhythmias are still being defined. OBJECTIVES: This study sought to describe the clinical course of ARVC and occurrence of life-threatening arrhythmic events (LAE) and cardiovascular mortality; identify risk factors associated with increased LAE risk; and define the response to therapy. METHODS: We determined the clinical course of 301 consecutive patients with ARVC using the Kaplan-Meier method adjusted to avoid the bias of delayed entry...
December 13, 2016: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/27912983/hypertrophic-obstructive-cardiomyopathy
#6
REVIEW
Josef Veselka, Nandan S Anavekar, Philippe Charron
Hypertrophic obstructive cardiomyopathy is an inherited myocardial disease defined by cardiac hypertrophy (wall thickness ≥15 mm) that is not explained by abnormal loading conditions, and left ventricular obstruction greater than or equal to 30 mm Hg. Typical symptoms include dyspnoea, chest pain, palpitations, and syncope. The diagnosis is usually suspected on clinical examination and confirmed by imaging. Some patients are at increased risk of sudden cardiac death, heart failure, and atrial fibrillation...
November 30, 2016: Lancet
https://www.readbyqxmd.com/read/27909501/-two-for-the-price-of-one-a-single-lead-implantable-cardioverter-defibrillator-system-with-a-floating-atrial-dipole
#7
REVIEW
Nicole E Worden Md, Musab Alqasrawi Md, Siva M Krothapalli Md, Alexander Mazur Md
In patients known to be a high risk for sudden cardiac arrest, implantable cardioverter defibrillators (ICD) are a proven therapy to reduce risk of death. However, in patients without conventional indications for pacing, the optimal strategy for type of device, dual- versus single-chamber, remains debatable. The benefit of prophylactic pacing in this category of patients has never been documented. Although available atrial electrograms in a dual chamber system improve interpretation of stored arrhythmia events, allow monitoring of atrial fibrillation and may potentially reduce the risk of inappropriate shocks by enhancing automated arrhythmia discrimination, the use of dual-chamber ICDs has a number of disadvantages...
April 2016: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/27905927/characteristics-and-outcomes-of-diabetic-patients-with-an-implantable-cardioverter-defibrillator-in-a-real-world-setting-results-from-the-israeli-icd-registry
#8
Hillel Steiner, Michael Geist, Ilan Goldenberg, Mahmoud Suleiman, Michael Glikson, Alexander Tenenbaum, Moshe Swissa, Enrique Z Fisman, Gregory Golovchiner, Boris Strasberg, Alon Barsheshet
AIMS: There are limited data regarding the effect of diabetes mellitus (DM) on the risks of both appropriate and inappropriate implantable cardioverter defibrillator (ICD) therapy. The present study was designed to compare the outcome of appropriate and inappropriate ICD therapy in patients with or without DM. METHODS AND RESULTS: The risk of a first appropriate ICD therapy for ventricular tachyarrhythmias (including anti tachycardia pacing and shock) was compared between 764 DM and 1346 non-DM patients enrolled in the national Israeli ICD registry...
December 1, 2016: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/27905161/the-impact-of-co-morbidity-burden-on-appropriate-implantable-cardioverter-defibrillator-therapy-and-all-cause-mortality-insight-from-danish-nationwide-clinical-registers
#9
Anne Christine Ruwald, Michael Vinther, Gunnar H Gislason, Jens Brock Johansen, Jens Cosedis Nielsen, Helen Høgh Petersen, Sam Riahi, Christian Jons
AIMS: In a nationwide cohort of primary (PP-ICD) and secondary prevention (SP-ICD) implantable cardioverter defibrillator (ICD) patients, we aimed to investigate the association between co-morbidity burden and risk of appropriate ICD therapy and mortality. METHODS AND RESULTS: We identified all patients >18 years, implanted with first-time PP-ICD (n = 1873) or SP-ICD (n = 2461) in Denmark from 2007 to 2012. Co-morbidity was identified in administrative registers of hospitalization and drug prescription from pharmacies...
December 1, 2016: European Journal of Heart Failure
https://www.readbyqxmd.com/read/27892420/ehealth-in-cardiovascular-medicine-a-clinical-update
#10
Hugo Saner, Enno van der Velde
Demographic changes, progress in medicine technology and regional problems in providing healthcare to low density populations are posing great challenges to our healthcare systems. Rapid progress in computer sciences and information technologies have a great impact on the way healthcare will be delivered in the near future. This article describes opportunities and challenges of eHealth and telemedicine in the framework of our health systems and, in particular, in the context of today's cardiology services. The most promising applications of eHealth and telemedicine include: (a) prevention and lifestyle interventions; (b) chronic disease management including hypertension, diabetes and heart failure; (c) arrhythmia detection including early detection of atrial fibrillation and telemonitoring of devices such as pacemaker, internal cardioverter defibrillators and implantable rhythm monitoring devices; (d) telerehabilitation...
October 2016: European Journal of Preventive Cardiology
https://www.readbyqxmd.com/read/27888304/the-wearable-cardioverter-defibrillator-in-a-real-world-clinical-setting-experience-in-102-consecutive-patients
#11
Julia W Erath, Mate Vamos, Abdul Sami Sirat, Stefan H Hohnloser
BACKGROUND: The wearable cardioverter-defibrillator (WCD) is used for temporary protection of patients deemed to be at high risk for sudden death (SCD) not yet meeting indications for the implantable defibrillator (ICD). OBJECTIVES: To evaluate the efficacy, safety, and compliance of/to WCD use and subsequent medium-term outcome of patients in a single-center observational study. METHODS: A total of 102 consecutive patients were fitted with the WCD from 2012 to 2015 and followed for a mean of 11 months (±8 months)...
November 25, 2016: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
https://www.readbyqxmd.com/read/27884249/long-term-arrhythmic-and-nonarrhythmic-outcomes-of-lamin-a-c-mutation-carriers
#12
Saurabh Kumar, Samuel H Baldinger, Estelle Gandjbakhch, Philippe Maury, Jean-Marc Sellal, Alexander F A Androulakis, Xavier Waintraub, Philippe Charron, Anne Rollin, Pascale Richard, William G Stevenson, Ciorsti J Macintyre, Carolyn Y Ho, Tina Thompson, Jitendra K Vohra, Jonathan M Kalman, Katja Zeppenfeld, Frederic Sacher, Usha B Tedrow, Neal K Lakdawala
BACKGROUND: Mutations in LMNA are variably expressed and may cause cardiomyopathy, atrioventricular block (AVB), or atrial arrhythmias (AAs) and ventricular arrhythmias (VA). Detailed natural history studies of LMNA-associated arrhythmic and nonarrhythmic outcomes are limited, and the prognostic significance of the index cardiac phenotype remains uncertain. OBJECTIVES: This study sought to describe the arrhythmic and nonarrhythmic outcomes of LMNA mutation carriers and to assess the prognostic significance of the index cardiac phenotype...
November 29, 2016: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/27876282/to-use-or-not-to-use-amiodarone-before-heart-transplantation
#13
Entela B Lushaj, Ravi Dhingra, Shahzad Chindhy, Shahab Akhter, Takushi Kohmoto, Susan Ulschmid, Satoru Osaki, Abbasali Badami, Lucian Lozonschi
BACKGROUND: Amiodarone frequently is used in patients with heart failure. Concerns still exist about possible complications related to its lingering effect during and after heart transplantation. METHODS: We selected all consecutive patients who received a heart transplant at our institution between January 2004 and December 2015 (n = 220) and compared the peri- and postoperative outcomes of patients who were taking amiodarone for at least 120 days before heart transplant (n = 127) with patients who did not take amiodarone prior to heart transplant (n = 93)...
November 19, 2016: Surgery
https://www.readbyqxmd.com/read/27865189/screening-entire-healthcare-system-ecg-database-association-of-deep-terminal-negativity-of-p-wave-in-lead-v1-and-ecg-referral-with-mortality
#14
Allison Junell, Jason Thomas, Lauren Hawkins, Jiri Sklenar, Trevor Feldman, Charles A Henrikson, Larisa G Tereshchenko
BACKGROUND: Each encounter of asymptomatic individuals with the healthcare system presents an opportunity for improvement of cardiovascular disease (CVD) awareness and sudden cardiac death (SCD) risk assessment. ECG sign deep terminal negativity of the P wave in V1 (DTNPV1) was shown to be associated with an increased risk of SCD in the general population. OBJECTIVE: To evaluate association of DTNPV1 with all-cause mortality and newly diagnosed atrial fibrillation (AFib) in the large tertiary healthcare system patient population...
February 1, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/27863358/temporal-trends-and-long-term-follow-up-of-implantable-cardioverter-defibrillator-therapy-for-secondary-prevention-a-15-year-single-centre-experience
#15
Maria Luce Caputo, François Regoli, Giulio Conte, Boris Adjibodou, Stefano Svab, Alessandro Del Bufalo, Tiziano Moccetti, Moreno Curti, Catherine Klersy, Angelo Auricchio
BACKGROUND: The aim of this study was to determine overall and aetiology-related incidence of secondary prevention ICD implantation over the last 15years in Canton Ticino and to assess clinical outcome according to time period of implantation. METHODS AND RESULTS: Consecutive patients treated by implantation of an ICD for secondary prevention from 2000 to 2015 were included in the current study and compared between 5-year cohorts (2000/2004; 2005/2009; 2010/2015)...
February 1, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/27861115/leadless-cardiac-pacing-what-primary-care-providers-and-non-ep-cardiologists-should-know
#16
REVIEW
Erich L Kiehl, Daniel J Cantillon
Over the last 50 years, the use of transvenous pacemakers has been constrained by long-term complications that affect more than 1 in 10 patients, largely attributable to the endovascular leads and surgical pocket. Leadless cardiac pacing involves a self-contained pacemaker deployed directly into the heart without a lead or incisional access. The procedure has shown promise, eliminating pocket-related complications. Other advantages include postprocedural shoulder mobility and the ability to drive, shower, and bathe...
November 2016: Cleveland Clinic Journal of Medicine
https://www.readbyqxmd.com/read/27801691/sudden-cardiac-death-in-transposition-of-the-great-arteries-with-a-mustard-or-senning-baffle-the-myocardial-ischemia-hypothesis
#17
Paul Khairy
PURPOSE OF REVIEW: The literature on sudden death in transposition of the great arteries (D-TGA) with atrial switch surgery is reviewed and a pathophysiological mechanism is proposed. RECENT FINDINGS: Over 80% of sudden deaths in patients with D-TGA and Mustard or Senning baffles occur during exercise. Factors most consistently associated with ventricular arrhythmias and sudden death include heart failure parameters and atrial arrhythmias. Atrial arrhythmias have been observed to trigger malignant ventricular arrhythmias...
January 2017: Current Opinion in Cardiology
https://www.readbyqxmd.com/read/27800644/clinical-risk-profile-score-predicts-all-cause-mortality-but-not-implantable-cardioverter-defibrillator-intervention-rate-in-a-large-unselected-cohort-of-patients-with-congestive-heart-failure
#18
Johanna Sjöblom, Rasmus Borgquist, Fredrik Gadler, Torbjörn Kalm, Lina Ljung, Mårten Rosenqvist, Viveka Frykman, Pyotr G Platonov
BACKGROUND: Primary prophylactic implantable cardioverter defibrillator (ICD) therapy is indicated for patients with reduced left ventricular ejection fraction (LVEF). We aimed to determine if preoperative clinical risk profiling can predict long-term benefit, and if clinical risk scores can be applied and improved in a patient cohort outside the clinical trial setting. METHODS: Using registry data, 789 patients with reduced LVEF who received ICDs for primary prevention during 2006-2011 were identified (age 64 ± 11 years, 82% men, 63% ischemic etiology, 52% cardiac resynchronization therapy with defibrillator)...
November 1, 2016: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/27778352/long-term-stability-and-clinical-utility-of-amplified-atrial-electrograms-in-a-single-lead-icd-system-with-floating-atrial-electrodes
#19
Nicole E Worden, Musab Alqasrawi, Alexander Mazur
BACKGROUND: Available atrial electrograms in implantable cardioverter defibrillators (ICDs) improve arrhythmia diagnosis, allow monitoring for atrial fibrillation, and may reduce the risk of inappropriate therapies. A recently introduced ICD system using a single-lead with floating atrial electrodes provides diagnostic capability of a dual-chamber system without placing an additional lead. Data on long-term clinical performance of this system are limited. METHODS: We retrospectively analyzed data from 35 consecutive patients implanted with Biotronik VR-T DX devices and Linox(Smart) DX leads...
December 2016: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/27760795/association-between-a-prolonged-pr-interval-and-outcomes-of-cardiac-resynchronization-therapy-a-report-from-the-national-cardiovascular-data-registry
#20
Daniel J Friedman, Haikun Bao, Erica S Spatz, Jeptha P Curtis, James P Daubert, Sana M Al-Khatib
BACKGROUND: A prolonged PR interval is common among cardiac resynchronization therapy (CRT) candidates; however, the association between PR interval and outcomes is unclear, and the data are conflicting. METHODS: We conducted inverse probability weighted analyses of 26 451 CRT-eligible (ejection fraction ≤35, QRS ≥120 ms) patients from the National Cardiovascular Data Registry ICD Registry to assess the association between a prolonged PR interval (≥230 ms), receipt of CRT with defibrillator (CRT-D) versus implantable cardioverter defibrillator (ICD), and outcomes...
November 22, 2016: Circulation
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