Electrophysiologically Guided Substrate Modification During Sinus Rhythm
نویسندگان
چکیده
منابع مشابه
Electrophysiologically Guided Substrate Modification During Sinus Rhythm
Atrial fibrillation, the most common sustained cardiac arrhythmia, has a complex and multifaceted pathophysiology. The presence of a predisposing substrate, frequently encompassing atrial hypertrophy, fibrosis, and significant alterations of the extracellular matrix, is contributing to intra-atrial electric conduction delay as well as shortening and dispersion of atrial refractory periods. Trig...
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BACKGROUND The high incidence of postprocedural atrial tachycardia reduces the absolute arrhythmia-free success rate of extensive ablation strategies to treat nonparoxysmal atrial fibrillation (NPAF). We hypothesized that a strategy of targeting low-voltage zones and sites with abnormal electrograms during sinus rhythm (SR-AEs) in the left atrium after circumferential pulmonary vein isolation a...
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We evaluated the effects of slow-rate atrial pacing on impulse formation of the sinus node in 13 isolated rabbit right atria using the microelectrode technique. After the spread of activation was mapped to determine true sinoatrial conduction time (SACT) (38 ± 16 msec [± SD]), the atrium was paced for eight beats at constant intervals slightly shorter than spontaneous cycle length in steps of 1...
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Previous studies have found that respiratory variations of ventricular response in atrial fibrillation are infrequent and inconsistent. This asynchrony between heart rate and respiration may characterize the physiological mechanisms coupling heart rate and systolic blood pressure oscillations in the respiratory band. The aim of this study was to evaluate whether synchronous variations in systol...
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Implantable cardioverter defibrillators (ICDs) can effectively terminate ventricular tachycardia (VT) when it occurs, but they do not prevent initiation of VT. There are several reasons why prevention of episodes is desirable. When VT is promptly and painlessly terminated by antitachycardia pacing, it can be asymptomatic. However, patients describe defibrillator shocks as terrible events that e...
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ژورنال
عنوان ژورنال: Circulation: Arrhythmia and Electrophysiology
سال: 2016
ISSN: 1941-3149,1941-3084
DOI: 10.1161/circep.116.003832