Bipolar Electrogram Shannon Entropy at Sites of Rotational Activation
نویسندگان
چکیده
منابع مشابه
Bipolar electrogram shannon entropy at sites of rotational activation: implications for ablation of atrial fibrillation.
BACKGROUND The pivot is critical to rotors postulated to maintain atrial fibrillation (AF). We reasoned that wavefronts circling the pivot should broaden the amplitude distribution of bipolar electrograms because of directional information encoded in these signals. We aimed to determine whether Shannon entropy (ShEn), a measure of signal amplitude distribution, could differentiate the pivot fro...
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BACKGROUND High-dominant frequency (DF) and continuous complex fractionated atrial electrogram (CFAE) sites as surrogates for localized sources maintaining atrial fibrillation (AF) are potential AF ablation targets. This study aimed to evaluate the characteristics of a rotational activation at high-DF and continuous CFAE sites in AF patients. METHODS Thirty-two consecutive AF patients (5 paro...
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Shannon entropy is increasingly used in many applications. In this article, an estimator of the entropy of a continuous random variable is proposed. Consistency and scale invariance of variance and mean squared error of the proposed estimator is proved and then comparisons are made with Vasicek's (1976), van Es (1992), Ebrahimi et al. (1994) and Correa (1995) entropy estimators. A simulation st...
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BACKGROUND Rotors are postulated to maintain cardiac fibrillation. Despite the importance of bipolar electrograms in clinical electrophysiology, few data exist on the properties of bipolar electrograms at rotor sites. The pivot of a spiral wave is characterized by relative uncertainty of wavefront propagation direction compared to the periphery. The bipolar electrograms used in electrophysiolog...
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ژورنال
عنوان ژورنال: Circulation: Arrhythmia and Electrophysiology
سال: 2013
ISSN: 1941-3149,1941-3084
DOI: 10.1161/circep.112.976654