keyword
MENU ▼
Read by QxMD icon Read
search

Atrial fibrillation pace

keyword
https://www.readbyqxmd.com/read/28730651/a-comparison-of-the-electrophysiologic-and-electroanatomic-characteristics-between-the-right-and-left-atrium-in-persistent-atrial-fibrillation-is-the-right-atrium-a-window-into-the-left
#1
Sandeep Prabhu, Aleksandr Voskoboinik, Alex Ja McLellan, Kah Y Peck, Bupesh Pathik, Chrishan J Nalliah, Geoff R Wong, Sonia M Azzopardi, Geoffrey Lee, Justin Mariani, Liang-Han Ling, Andrew J Taylor, Jonathan M Kalman, Peter M Kistler
INTRODUCTION: The right atrium (RA) is readily accessible; however, it is unclear whether changes in the RA are representative of the LA. We performed detailed bi-atrial electroanatomic mapping to determine the electrophysiological relationship between the atria. METHODS AND RESULTS: Consecutive patients with persistent AF underwent bi-atrial electroanatomical mapping with a contact force catheter acquiring points with a CF > 10 g prior to ablation. Points were analyzed for tissue voltage, complex electrograms, low voltage (< 0...
July 21, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28728352/the-association-between-physical-activity-and-atrial-fibrillation-applying-heaviside-function-in-survival-analysis-the-multi-ethnic-study-of-atherosclerosis-mesa
#2
Yaser Mokhayeri, Seyed Saeed Hashemi Nazari, Mohammad Ali Mansournia, Hamid Soori, Soheila Khodakarim
Objectives: Although the effect of physical activity (PA) on the incidence of atrial fibrillation (AF) has been studied, contradictory results have been reported. These seemingly different results may reflect alternate effects of different types of PA upon AF as well as gender interactions. Therefore, we aimed to evaluate the association of PA types namely total, moderate/vigorous, intentional, as well as walking pace on AF risk, in men and women. Methods: Using the MESA Typical Week Physical Activity Survey, three PA measures and walking pace among 6487 men and women aged 45-84 years were calculated...
June 18, 2017: Epidemiology and Health
https://www.readbyqxmd.com/read/28709743/ischemic-stroke-with-cardiac-pacemaker-implantation-comparison-of-physiological-and-ventricular-pacing-modes
#3
Yuji Kato, Takeshi Hayashi, Ritsushi Kato, Norio Tanahashi, Masaki Takao
BACKGROUND: The clinical characteristics of ischemic stroke in patients with a pacemaker (PM) are not well understood. METHODS: Forty-six ischemic stroke patients with a PM were investigated retrospectively, and the impact of different pacing modes was compared. RESULTS: The patients were divided into a physiological pacing group (n = 22) and a ventricular pacing group (n = 24). The prevalence of atrial fibrillation (AF) was significantly higher in the ventricular pacing group (36% versus 75%; P = ...
July 11, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28708290/rationale-and-design-of-the-adaptresponse-trial-a-prospective-randomized-study-of-cardiac-resynchronization-therapy-with-preferential-adaptive-left-ventricular-only-pacing
#4
Gerasimos Filippatos, David Birnie, Michael R Gold, Bart Gerritse, Ahmad Hersi, Sandra Jacobs, Kengo Kusano, Christophe Leclercq, Wilfried Mullens, Bruce L Wilkoff
The AdaptResponse trial is designed to test the hypothesis that preferential adaptive left ventricular-only pacing with the AdaptivCRT(®) algorithm reduces the incidence of the combined endpoint of all-cause mortality and intervention for heart failure (HF) decompensation, compared with conventional cardiac resynchronization therapy (CRT), among patients with a CRT indication, left bundle branch block (LBBB) and normal atrioventricular (AV) conduction. The AdaptResponse study is a prospective, randomized, controlled, single-blinded, multicentre, clinical trial (ClinicalTrials...
July 2017: European Journal of Heart Failure
https://www.readbyqxmd.com/read/28706863/non-functional-tricuspid-valve-disease
#5
REVIEW
Dale S Adler
Only 75% of severe tricuspid regurgitation is classified as functional, or related primarily to pulmonary hypertension, right ventricular dysfunction, or a combination of both. Non-functional tricuspid regurgitation occurs when there is damage to the tricuspid leaflets, chordae, papillary muscles, or annulus, independent of right ventricular dysfunction or pulmonary hypertension. The entities that cause non-functional tricuspid regurgitation include rheumatic and myxomatous disease, acquired and genetic connective tissue disorders, endocarditis, sarcoid, pacing, RV biopsy, blunt trauma, radiation, carcinoid, ergot alkaloids, dopamine agonists, fenfluramine, cardiac tumors, atrial fibrillation, and congenital malformations...
May 2017: Annals of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/28702812/characterisation-of-human-av-nodal-properties-using-a-network-model
#6
Mikael Wallman, Frida Sandberg
Characterisation of the AV-node is an important step in determining the optimal form of treatment for supraventricular tachycardias. To integrate and analyse patient-specific measurements, mathematical modelling has emerged as a valuable tool. Here we present a model of the human AV-node, consisting of a series of interacting nodes, each with separate dynamics in refractory time and conduction delay. The model is evaluated in several scenarios, including atrial fibrillation (AF) and clinical pacing, using simulated and measured data...
July 13, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/28692548/comparison-of-vernakalant-and-ranolazine-in-atrial-fibrillation
#7
Gerrit Frommeyer, Magdalena Sterneberg, Dirk G Dechering, Simon Kochhäuser, Nils Bögeholz, Michael Fehr, Lars Eckardt
BACKGROUND: Current guidelines recommend vernakalant for pharmacologic cardioversion of recent-onset atrial fibrillation. However, this drug is not established as chronic therapy. METHODS AND RESULTS: In total, 15 rabbit hearts were Langendorff-perfused. A burst pacing protocol-induced atrial fibrillation in 7 of 15 hearts at baseline (10 episodes). Subsequently, a combination of acetylcholine and isoproterenol (ACH/ISO) has been administered to increase occurrence of atrial fibrillation resulting in a reduction of atrial action potential duration (-25 ms, P < 0...
July 7, 2017: Journal of Cardiovascular Medicine
https://www.readbyqxmd.com/read/28687671/tachycardia-induced-j-wave-changes-in-patients-with-and-without-idiopathic-ventricular-fibrillation
#8
Yoshiyasu Aizawa, Seiji Takatsuki, Takahiko Nishiyama, Takehiro Kimura, Shun Kohsaka, Yoshiaki Kaneko, Yasuya Inden, Naohiko Takahashi, Satoshi Nagase, Yoshifusa Aizawa, Keichi Fukuda
BACKGROUND: To know the underlying mechanisms of J waves, the response to atrial pacing was studied in patients with idiopathic ventricular fibrillation (IVF) and patients with non-IVF. METHODS AND RESULTS: In 8 patients with IVF, the J-wave amplitude was measured before, during, and after atrial pacing. All patients had episodes of ventricular fibrillation without structural heart disease. The responses of J waves were compared with those of the 17 non-IVF control subjects who revealed J waves but no history of cardiac arrest and underwent electrophysiological study...
July 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28687248/device-therapy-for-rate-control-pacing-resynchronisation-and-av-node-ablation
#9
REVIEW
Dennis H Lau, Anand Thiyagarajah, Stephan Willems, Thomas Rostock, Dominik Linz, Martin K Stiles, David Kaye, Jonathan M Kalman, Prashanthan Sanders
Atrioventricular node ablation (AVNA) is generally reserved for patients whose atrial fibrillation (AF) is refractory all other therapeutic options, since the recipients will often become pacemaker dependent. In such patients, this approach may prove particularly useful, especially if a tachycardia-induced cardiomyopathy is suspected. Historically, an "ablate and pace" approach has involved AVNA and right ventricular pacing, with or without an atrial lead. There is also an evolving role for atrioventricular node ablation in patients with AF who require cardiac resynchronization therapy for treatment of systolic heart failure...
May 31, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/28677917/recovery-of-atrioventricular-conduction-in-patients-with-heart-block-after-transcatheter-aortic-valve-replacement
#10
Colin A Raelson, James Gabriels, Jonathan Ruan, James E Ip, George Thomas, Christopher F Liu, Jim W Cheung, Bruce B Lerman, Apoor Patel, Steven M Markowitz
INTRODUCTION: Recovery of conduction has been demonstrated in >50% of patients who receive pacemakers (PPMs) for high-degree atrioventricular block (HD-AVB) after transcatheter aortic valve replacement (TAVR). Little information is available about the time course of conduction recovery in these patients and if any features predict early recovery of conduction. METHODS: A retrospective review was performed of patients who underwent TAVR with balloon and self-expanding valves who required PPMs for HD-AVB...
July 5, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28676183/preclinical-efficacy-and-safety-of-kcnh2-g628s-gene-therapy-for-postoperative-atrial-fibrillation
#11
Zhao Liu, Julie A Hutt, Barur Rajeshkumar, Yoshihiro Azuma, Kailai L Duan, J Kevin Donahue
BACKGROUND: Postoperative atrial fibrillation (POAF) is the most common complication occurring after cardiac surgery. Multiple studies have shown significantly increased risks of stroke, myocardial infarction, and death associated with POAF. Current prophylaxis strategies are inadequate to eliminate this problem. We examined the preclinical efficacy and safety of KCNH2-G628S gene transfer to prevent POAF. METHODS: Domestic pigs received AdKCNH2-G628S by epicardial atrial gene painting and atrial pacemaker implantation for continuous-burst pacing to induce atrial fibrillation...
May 23, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28666317/right-ventricular-and-tricuspid-valve-function-in-patients-chronically-implanted-with-leadless-pacemakers
#12
Erwan Salaun, Lilith Tovmassian, Blandine Simonnet, Roch Giorgi, Frédéric Franceschi, Linda Koutbi-Franceschi, Jérôme Hourdain, Gilbert Habib, Jean-Claude Deharo
Aims: Leadless cardiac pacing has recently been proposed as alternative to conventional right ventricular (RV) pacing. With this approach, devices are directly screwed or fixed with tines in the RV wall, but the possible consequences on RV and tricuspid valve (TV) structure and function remain unknown. We thus conducted a study to evaluate this potential impact in chronically implanted patients. Methods and results: Repeated echocardiographic studies were performed prior to implantation, at discharge, and 2 months thereafter on all consecutive patients implanted with a leadless pacemaker at our centre between October 2014 and end-December 2015...
June 28, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28660476/a%C3%A2-review-of-the-atrial-upper-rate-algorithms-of-st-jude-medical-abbott-cardiac-implantable-electronic-devices-incidence-of-repetitive-nonreentrant-ventriculoatrial-synchrony-rnrvas
#13
REVIEW
S S Barold
This review focuses on the manifestations of the three triggered atrial upper rate functions of St Jude Medical cardiac implantable electronic devices. The occurrence of repetitive nonreentrant ventriculoatrial synchrony (RNRVAS) is also evaluated as a basis for the development of automatic mode switching (AMS) and as a trigger for atrial tachycardia/atrial fibrillation (AT/AF) event recordings. RNRVAS is a common trigger for AMS because all the atrial events or intervals are used to calculate the filtered atrial rate interval (FARI)...
June 28, 2017: Herzschrittmachertherapie & Elektrophysiologie
https://www.readbyqxmd.com/read/28648667/simultaneous-recordings-of-intrinsic-cardiac-nerve-activities-and-skin-sympathetic-nerve-activities-from-human-patients-during-the-postoperative-period
#14
Mark J Shen, Arthur C Coffey, Susan Straka, David E Adams, David B Wagner, Richard J Kovacs, Michael Clark, Changyu Shen, Lan S Chen, Thomas H Everett, Shien-Fong Lin, Peng-Sheng Chen
BACKGROUND: Intrinsic cardiac nerve activities (ICNA) and the skin nerve activities (SKNA) are both associated with cardiac arrhythmias in dogs. OBJECTIVE: To test the hypothesis that ICNA and SKNA correlate with postoperative cardiac arrhythmias in humans. METHODS: Eleven patients (60±13 years old; 4 female) were enrolled in this study. Electrical signals were simultaneously recorded from electrocardiogram (ECG) patch electrodes on the chest wall and from two temporary pacing wires placed during open heart surgery on the left atrial epicardial fat pad...
June 22, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28639747/the-effect-of-activation-rate-on-left-atrial-bipolar-voltage-in-patients-with-paroxysmal-atrial-fibrillation
#15
Steven E Williams, Nick Linton, Louisa O'Neill, James Harrison, John Whitaker, Rahul Mukherjee, Christopher A Rinaldi, Jaswinder Gill, Steven Niederer, Matthew Wright, Mark O'Neill
INTRODUCTION: Bipolar voltage is used during electroanatomic mapping to define abnormal myocardium, but the effect of activation rate on bipolar voltage is not known. We hypothesized that bipolar voltage may change in response to activation rate. By examining corresponding unipole signals we sought to determine the mechanisms of such changes. METHODS AND RESULTS: LA extrastimulus mapping was performed during CS pacing in 10 patients undergoing 1(st) time paroxysmal atrial fibrillation ablation...
June 22, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28636524/his-bundle-pacing-using-dual-chamber-cardioverter-defibrillator-in-patients-with-chronic-atrial-fibrillation-different-pacing-and-sensing-features
#16
Agnieszka Sławuta, Dariusz Biały, Dorota Zyśko, Grzegorz Mazur, Jacek Gajek
No abstract text is available yet for this article.
June 2017: Acta Cardiologica
https://www.readbyqxmd.com/read/28630373/incidence-and-time-course-for-developing-heart-failure-with-high-burden-right-ventricular-pacing
#17
Faisal M Merchant, Michael H Hoskins, Dan L Musat, Julie B Prillinger, Gregory J Roberts, Yelena Nabutovsky, Suneet Mittal
BACKGROUND: Although right ventricular pacing can contribute to cardiomyopathy, the impact of complete atrioventricular block (cAVB) on heart failure (HF) development in pacemaker patients has not been well characterized. We evaluated the incidence and time course for developing HF after pacemaker implantation for cAVB. METHODS AND RESULTS: A MarketScan database identified patients undergoing dual-chamber pacemaker implantation from 2008 to 2014. Patients with cAVB were identified by an atrioventricular node ablation or diagnosis of third-degree AVB...
June 2017: Circulation. Cardiovascular Quality and Outcomes
https://www.readbyqxmd.com/read/28607612/anatomical-dilatation-of-the-superior-vena-cava-associated-with-an-arrhythmogenic-response-induced-by-svc-scan-pacing-after-atrial-fibrillation-ablation
#18
Hiroshi Imada, Koji Fukuzawa, Kunihiko Kiuchi, Akinori Matsumoto, Hiroki Konishi, Hirotoshi Ichibori, Kiyohiro Hyogo, Jun Kurose, Shumpei Mori, Tomofumi Takaya, Tatsuya Nishii, Kiyosumi Kagawa, Akihiro Yoshida, Hirata Ken-Ichi
BACKGROUND: The relationship between pulmonary vein (PV) arrhythmogenicity and its anatomy has been reported. However, that of the superior vena cava (SVC) has not been well discussed. Arrhythmogenic response induced by pacing stimulation at SVC might help with identifying SVC arrhythmogenicity. The purpose of this study was to investigate the relationship between the anatomical dilatation of SVC and the arrhythmogenic response induced by pacing at SVC. METHODS: Forty-three patients who underwent atrial fibrillation (AF) ablation were enrolled in this study...
June 2017: Journal of Arrhythmia
https://www.readbyqxmd.com/read/28601532/genetics-of-atrial-fibrillation-state-of-the-art-in-2017
#19
REVIEW
Diane Fatkin, Celine F Santiago, Inken G Huttner, Steven A Lubitz, Patrick T Ellinor
Genetic variation is an important determinant of atrial fibrillation (AF) susceptibility. Numerous rare variants in protein-coding sequences of genes have been associated with AF in families and in early-onset cases, and chromosomal loci harbouring common risk variants have been mapped in AF cohorts. Many of these loci are in non-coding regions of the human genome and are thought to contain regulatory sequences that modulate gene expression. Disease genes implicated to date have predominantly encoded cardiac ion channels, with predicted mutation effects on the atrial action potential duration...
May 11, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/28594430/substrate-characteristics-and-ablation-outcome-of-left-atrial-tachycardia-in-rheumatic-mitral-valve-disease
#20
Hongwu Chen, Bing Yang, Weizhu Ju, Fengxiang Zhang, Gang Yang, Kai Gu, Mingfang Li, Hailei Liu, Zidun Wang, Kejiang Cao, Minglong Chen
BACKGROUND: Right atrial tachycardia (AT) is common arrhythmia post-surgical valve replacement in patients with rheumatic heart disease (RHD). However, the substrate and the mechanism of left AT in such patients and the ablation efficacy is less known. METHODS AND RESULTS: Twenty-seven RHD patients with AT were enrolled in this study, nine of them (33%) had Left AT. Five and four patients had left AT during the first and second procedure, respectively. A spontaneous scar in the left posterior wall was identified in all patients, and obvious anterior scar in three patients...
June 8, 2017: Pacing and Clinical Electrophysiology: PACE
keyword
keyword
73979
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"