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Cardiac resynchronization therapy or CRT

Daniel B Kramer, Daniel A Steinhaus
No abstract text is available yet for this article.
October 17, 2016: Journal of Cardiac Failure
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 data are conflicting. METHODS: -We conducted inverse probability weighted (IPW) analyses of 26,451 CRT eligible (EF≤35, QRS≥120ms) patients from the National Cardiovascular Data Registry ICD Registry to assess the association between a prolonged PR interval (≥230ms), receipt of CRT with defibrillator (CRT-D) versus implantable cardioverter defibrillator (ICD), and outcomes...
October 19, 2016: Circulation
John Rickard, Henry Michtalik, Ritu Sharma, Zackary Berger, Emmanuel Iyoha, Ariel R Green, Nowreen Haq, Karen A Robinson
BACKGROUND: Multiple studies have sought to determine variables associated with improved "response" to cardiac resynchronization therapy(CRT). Such variables, however, are often derived from inadequately controlled, single center cohort studies calling external validity into question. We sought to determine predictors of response to CRT-D and CRT-P utilizing the methods of systematic review. METHODS: We searched MEDLINE, Embase®, and the Cochrane Central Register of Controlled Trials (CENTRAL) from January 1, 1995, as this is the date of first article reporting use of CRT through October 20, 2014...
September 25, 2016: International Journal of Cardiology
Erica O Miller, Saurabh Malhotra, Ronald G Schwartz
No abstract text is available yet for this article.
October 6, 2016: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
Onur Kaypakli, Mevlüt Koç, Gökhan Gözübüyük, Durmuş Yıldıray Şahin
AIM: CRT was shown to improve HF prognosis. But many patients do not benefit from CRT. Optimization of LV lead position to the latest activated LV area is important to increase CRT response. We aimed to detect the relationship between LV lead sensing delay and echocardiographic and electrocardiographic response to CRT treatment. METHODS: We prospectively included 156 consecutive patients with HF diagnosis, QRS≥120 ms, LBBB, NYHA II-IV, LVEF<35% and scheduled for CRT (100 male, 56 female; mean age 65...
October 18, 2016: Pacing and Clinical Electrophysiology: PACE
Ali Vasheghani-Farahani, Masih Tajdini, Seyed Abolfazl Mohsenizadeh, Seyed Mohammad Reza Hosseini
BACKGROUND: Cardiac resynchronization therapy (CRT) is a medical device to help cardiac synchronized contractility by electrical impulses. Improvement of symptoms and left ventricular systolic function, reducing hospital admissions and mortality in patients with moderate to severe heart failure are the main benefits of administration of cardiac resynchronization therapy. CASE REPORT: In this article, we describe a case of heart failure and left bundle branch block (LBBB) who was candidate for cardiac resynchronization therapy; but after managing hyperkalemia, left bundle branch block resolved, ejection fraction increased and cardiac resynchronization therapy implantation was canceled...
May 2016: ARYA Atherosclerosis
Ranjit Kumar Nath, Ajay Raj, C Parvatagouda, Neeraj Pandit
Left ventricular lead placement in the appropriate branch of coronary sinus is the key to successful cardiac resynchronization therapy (CRT) and this step is technically challenging. We describe a case of non-ischemic cardiomyopathy with heart failure, taken up for cardiac resynchronization therapy with defibrillator (CRT-D) implantation. The quadripolar left ventricular lead was impossible to advance into the target lateral branch of the coronary sinus. We made a veno-venous loop, advancing the coronary guidewire through the middle cardiac vein to coronary sinus and then to superior vena cava...
September 2016: Indian Heart Journal
Ana Abreu, Helena Santa Clara
Cardiac resynchronization therapy (CRT) is an established treatment for patients with moderate-to-severe chronic heart failure (CHF) and intraventricular conduction delay, which is identified by a QRS interval of 120msec or more on a 12-lead electrocardiogram (ECG). CRT improved functional capacity, reduced hospitalizations for worsening CHF and increased survival. However, about 30-40% of patients who underwent CRT were non-responders with no clinical or echocardiographic improvement. Imaging parameters for prediction of CRT response have been reviewed...
October 14, 2016: Monaldi Archives for Chest Disease, Archivio Monaldi Per le Malattie del Torace
Marie Christine Iliou, Jean Christophe Blanchard, Aurélia Lamar-Tanguy, Pascal Cristofini, François Ledru
Large subsets of patients admitted in cardiac rehabilitation centers are having a pacemaker, cardiac resynchronization (CRT) or implantable cardiac defibrillator (ICD). Cardiac rehabilitation for patients, mostly with heart failure, with implanted electronic devices as pacemakers or ICD is a unique opportunity not only to optimize the medical treatment, to increase their exercise capacity and improves their clinical condition but also to supervise the correct functioning of the device. CRT reduces clinical symptoms and increases slightly the exercise capacity...
October 14, 2016: Monaldi Archives for Chest Disease, Archivio Monaldi Per le Malattie del Torace
Agnieszka Młynarska, Rafał Młynarski, Krzysztof S Gołba, Maciej Sosnowski
BACKGROUND: We hypothesized that small differences in the anatomy of the coronary venous tree might be one of the factors responsible for the differences in the respond for cardiac resynchronization depending on a patient's gender. METHODS: The cardiac computed tomography scans with retrospective gating were performed on 315 subjects (aged 58.3 ± 11.6; 117 women) according to the clinical criteria. The standard protocol for coronary arteries was used during scanning...
October 17, 2016: Kardiologia Polska
Martin Grett, Martin Christ, Hans-Joachim Trappe
BACKGROUND: Little is known about the incidence and risk factors for progression to pacemaker dependency or the need for cardiac resynchronization in typical patients with an implanted defibrillator with regard to an alternative implantation of a subcutaneous ICD (S-ICD). STUDY DESIGN AND METHODS: After retrospective analysis of 291 patients with first implantation of a transvenous single chamber ICD (VVI-ICD) from 2010-2016 and excluding those with an indication for pacemaker or lack of follow-up data, 121 patients were included and investigated with regard to the following endpoints: need for pacemaker stimulation, upgrade for cardiac resynchronization (CRT), and secondary occurrence and effectiveness of antitachycardia pacing (ATP)...
October 13, 2016: Herzschrittmachertherapie & Elektrophysiologie
Christopher Piorkowski, Ole-A Breithardt, Hedi Razavi, Yelena Nabutovsky, Stuart P Rosenberg, Craig D Markovitz, Arash Arya, Sascha Rolf, Silke John, Jedrzej Kosiuk, Eric Olson, Charlotte Eitel, Yan Huo, Michael Döring, Sergio Richter, Kyungmoo Ryu, Thomas Gaspar, Frits W Prinzen, Gerhard Hindricks, Philipp Sommer
AIMS: In times of evolving cardiac resynchronization therapy, intra-procedural characterization of left ventricular (LV) mechanical activation patterns is desired but technically challenging with currently available technologies. In patients with normal systolic function, we evaluated the feasibility of characterizing LV wall motion using a novel sensor-based, real-time tracking technology. METHODS AND RESULTS: Ten patients underwent simultaneous motion and electrical mapping of the LV endocardium during sinus rhythm using electroanatomical mapping and navigational systems (EnSite™ NavX™ and MediGuide™, SJM)...
October 12, 2016: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
Mateusz Tajstra, Elżbieta Gadula-Gacek, Anna Kurek, Elżbieta Adamowicz-Czoch, Dawid Olszowski, Mateusz Ostręga, Aneta Ciślak, Łukasz Pyka, Michał Hawranek, Andrzej Lekston, Lech Poloński, Mariusz Gąsior
BACKGROUND: Current real-life information from all-comers registries from middle and east Europe about the incidence and type of complications during long-term follow-up of patients with cardioverters-defibrillators (ICD) and cardiac resynchronization devices-defibrillators (CRT-D) is still insufficient. The aim of the study was to assess the incidence and determinants of short- and long-term complications related to implantable ICD and CRT-D. METHODS: We studied 1,105 recipients hospitalized in our center in 2009-2013, followed for a mean of 2...
October 13, 2016: Cardiology Journal
Avishag Laish-Farkash, Sharon Bruoha, Amos Katz, Ilan Goldenberg, Mahmoud Suleiman, Yoav Michowitz, Nir Shlomo, Michal Einhorn-Cohen, Vladimir Khalameizer
AIMS: Cardiac resynchronization therapy (CRT) with a defibrillator (CRT-D) has downsides of high cost and inappropriate shocks compared to CRT without a defibrillator (CRT-P). Recent data suggest that the survival benefit of implantable cardioverter defibrillator (ICD) therapy is attenuated in the older age group. We hypothesized that, among octogenarians eligible for cardiac resynchronization therapy, CRT-P confers similar morbidity and mortality benefits as CRT-D. METHODS AND RESULTS: We compared morbidity and mortality outcomes between consecutive octogenarian patients eligible for CRT therapy who underwent CRT-P implantation at Barzilai MC (n = 142) vs...
October 12, 2016: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
Pieter Martens, Frederik H Verbrugge, Petra Nijst, Matthias Dupont, Wilfried Mullens
BACKGROUND: Cardiac resynchronization therapy (CRT) improves morbidity and mortality in heart failure with reduced ejection fraction (HFrEF) and electrical dyssynchrony. CRT patients in clinical practice are older compared to clinical trials. OBJECTIVE: To investigate clinical response, reverse remodeling, outcome and mode of death in octogenarians receiving CRT. METHODS: Baseline characteristics, change in New York Heart Association (NYHA) functional class, reverse ventricular remodeling, heart failure readmissions, all-cause mortality and mode of death were evaluated in CRT patients with comparison between octogenarians and non-octogenarians...
October 4, 2016: Journal of Cardiac Failure
A Zweerink, L Wu, G J de Roest, R Nijveldt, C C de Cock, A C van Rossum, C P Allaart
AIMS: This study evaluates the relative importance of two components of QRS prolongation, myocardial conduction velocity and travel distance of the electrical wave front (i.e. path length), for the prediction of acute response to cardiac resynchronization therapy (CRT) in left bundle branch block (LBBB) patients. METHODS: Thirty-two CRT candidates (ejection fraction <35%, LBBB) underwent cardiac magnetic resonance (CMR) imaging to provide detailed information on left ventricular (LV) dimensions...
October 5, 2016: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
Daniel B Kramer, Paul W Jones, Tyson Rogers, Susan L Mitchell, Matthew R Reynolds
AIMS: Cardiac resynchronization therapy with implantable defibrillator backup (CRT-D) improves outcomes, but predictors and markers of response remain limited. Physical activity information collected by CRT devices may provide insights to CRT response and the relationship between activity changes and survival. METHODS: Patients entered into the LATITUDE remote monitoring system from 2008 to 2012 after receipt of a new CRT-D were eligible. Mean daily activity was calculated from LATITUDE uploads at baseline (first 3-10 days following implant) and 6 months (180-210 days)...
October 4, 2016: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
Maurizio Landolina, Giovanni Morani, Antonio Curnis, Antonello Vado, Antonio D'Onofrio, Valter Bianchi, Giuseppe Stabile, Martino Crosato, Barbara Petracci, Carlo Ceriotti, Luca Bontempi, Martina Morosato, Gian Paolo Ballari, Maurizio Gasparini
AIMS: Patients receiving cardiac resynchronization therapy defibrillators (CRT-Ds) are likely to undergo one or more device replacements, mainly for battery depletion. We assessed the economic impact of battery depletion on the overall cost of CRT-D treatment from the perspectives of the healthcare system and the hospital. We also compared devices of different generations and from different manufacturers in terms of therapy cost. METHODS AND RESULTS: We analysed data on 1792 CRT-Ds implanted in 1399 patients in 9 Italian centres...
October 4, 2016: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
Jamal Kheyi, Abdelilah BenelmekkI, Hicham Bouzelmat, Ali Chaib
No abstract text is available yet for this article.
October 2016: Journal of the Saudi Heart Association
Mark K Friedberg, Steven M Schwartz, Hargen Zhang, Christine Chiu-Man, Cedric Manlhiot, Maria V Ilina, Glen Van Arsdell, Joel A Kirsh, Brian W McCrindle, Elizabeth A Stephenson
BACKGROUND: It is unknown whether continuous cardiac resynchronization therapy (CRT) can lead to sustained improvement in hemodynamics after surgery for congenital heart disease (CHD). OBJECTIVE: We investigated whether CRT improves cardiac index (CI) and blood pressure in infants after biventricular repair of CHD. METHODS: We randomized infants < 4-months of age after biventricular CHD surgery to standard care or standard care plus CRT for 48-hours or until extubation if sooner...
September 26, 2016: Heart Rhythm: the Official Journal of the Heart Rhythm Society
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