Results 271 to 280 of about 59,437 (308)

Mechanisms of persistent atrial fibrillation

Current Opinion in Cardiology, 2014
Atrial fibrillation is the most common sustained arrhythmia, but its mechanisms are poorly understood. In particular, little is known about the factors that contribute to the establishment of persistent or permanent atrial fibrillation. This review addresses possible common signaling pathways that might promote both structural and electrical remodeling
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Circadian variation in dominant atrial fibrillation frequency in persistent atrial fibrillation

Physiological Measurement, 2010
Circadian variation in atrial fibrillation (AF) frequency is explored in this paper by employing recent advances in signal processing. Once the AF frequency has been estimated and tracked by a hidden Markov model approach, the resulting trend is analyzed for the purpose of detecting and characterizing the presence of circadian variation.
Frida, Sandberg, Andreas, Bollmann, Daniela, Husser, Martin, Stridh, Leif, Sörnmo   +4 more
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The atrial electrocardiogram in patients with persistent atrial fibrillation

Heart Rhythm
The electrocardiogram (ECG) in persistent atrial fibrillation (AF) is underused. Signal processing techniques can extract the f-waves from the QRS-T complex to generate the atrial ECG (A-ECG).This study aimed to explore A-ECG technical and clinical issues.Thirty patients (age, 62.6 ± 9.4 years; 80% male; CHA2DS2-VASc score, 2.2 ± 1.7; ejection fraction,
Ghaith Zaatari, Jorge Bohorquez, Laura E. Sutaria, Raul D. Mitrani, Jason Ng, Jeffrey J. Goldberger   +5 more
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Progression of paroxysmal atrial fibrillation to persistent atrial fibrillation in patients with bradyarrhythmias

American Heart Journal, 2007
The experimental concept that "atrial fibrillation (AF) begets AF" implies that atrial tachyarrhythmia (AT)/AF burden uniformly increases over time. However, the temporal patterns of paroxysmal AT/AF burden progression, its conversion to persistent AF, and the relationship to underlying disease in humans are unknown. We analyzed the average daily AT/AF
S. Saksena, D. A. Hettrick, J. L. Koehler, A. Grammatico, PADELETTI, LUIGI   +4 more
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Ligament of Marshall ablation for persistent atrial fibrillation

Pacing and Clinical Electrophysiology, 2021
AbstractBeyond pulmonary vein isolation, the two main additional strategies: Cox‐Maze procedure or targeting of electrical signatures (focal bursts, rotational activities, meandering wavelets), remain controversial. High‐density mapping of these arrhythmias has demonstrated firstly that a patchy lesion set is highly proarrhythmogenic, favoring macro‐re‐
Konstantinos Vlachos, Nicolas Derval, Thomas Pambrun, Josselin Duchateau, Claire A. Martin, George Bazoukis, Antonio Frontera, Masateru Takigawa, Takashi Nakashima, Michael Efremidis, Konstantinos P. Letsas, Felix Bourier, Clémentine André, Philipp Krisai, F. Daniel Ramirez, Tsukasa Kamakura, Takamitsu Takagi, Yosuke Nakatani, Romain Tixier, Remi Chauvel, Nicolas Welte, Takeshi Kitamura, Ghassen Cheniti, Frédéric Sacher, Pierre Jaïs, Michel Haïssaguerre, Mélèze Hocini   +26 more
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Evolution of Paroxysmal Atrial Fibrillation to Persistent or Permanent Atrial Fibrillation: Predictors of Progression

Journal of Atrial Fibrillation, 2009
Introduction: Paroxysmal atrial fibrillation (PAF) eventually progresses to persistent and permanent AF. The predictors of progression from PAF to persistent and permanent AF are poorly understood. Methods: Electronic medical records of 437 patients with PAF were reviewed in a retrospective cohort study.
Jayasree, Pillarisetti, Akshar, Patel, Kenneth, Boc, Sudharani, Bommana, Youssef, Sawers, Subbareddy, Vanga, Hari, Sayana, Warren, Chen, Jayanth, Nath, James, Vacek, Dhanunjaya, Lakkireddy   +10 more
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Catheter ablation for paroxysmal and persistent atrial fibrillation

Cochrane Database of Systematic Reviews, 2012
Atrial fibrillation (AF) is the most common cardiac arrhythmia seen in cardiovascular departments. Treatments include medical interventions and catheter ablation. Due to uncertainties in medical therapies for AF, and the need to continue sinus rhythm, ablation has been recently considered as a viable alternative.
Huai Sheng, Chen, Jun Min, Wen, Sheng Nan, Wu, Jian Ping, Liu   +3 more
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Efficacy of amiodarone for the termination of persistent atrial fibrillation

The American Journal of Cardiology, 1999
The efficacy and safety of amiodarone in the conversion of persistent atrial fibrillation (AF) were investigated in a prospective, randomized, controlled study. Of 67 consecutive patients (32 men, mean age 64+/-9 years) with AF lasting >48 hours, 33 received amiodarone and 34 received placebo.
G E, Kochiadakis, N E, Igoumenidis, M C, Solomou, M D, Kaleboubas, G I, Chlouverakis, P E, Vardas   +5 more
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Persistent atrial fibrillation following electrical injury

Occupational Medicine, 1995
Supraventricular arrhythmias are seen following non-fatal electrical injuries. They are believed to be transient, but this has never been confirmed. We report a case of fixed atrial fibrillation that has persisted for 20 years after an electrical injury at work.
H, Bøggild, L, Freund, J P, Bagger
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Entropy measurements in paroxysmal and persistent atrial fibrillation

Physiological Measurement, 2010
Recent studies on atrial fibrillation (AF) have identified different activation patterns in paroxysmal and persistent AF. In this study, bipolar intra-atrial registers from 28 patients (14 paroxysmal AF and 14 persistent AF) were analyzed in order to find out regional differences in the organization in both types of arrhythmias.
R, Cervigón, J, Moreno, R B, Reilly, J, Millet, J, Pérez-Villacastín, F, Castells   +5 more
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