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Challenges Associated with Interpreting Mechanisms of AF

… The authors review different AF mechanisms, including anatomical and functional re-entry, hierarchical drivers and anarchical multiple wavelets. …

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Article

Anisotropic Conduction and Re-entry in the Heart

… & Tables References Article Anisotropic Conduction and Re-entry in the Heart Demosthenes G Katritsis , View as PDF … pathway is determined by subtle electrophysiological-anatomical changes, and there may be an excitable gap. In …

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Idiopathic Left Ventricular Tachycardia Originating in the Left Posterior Fascicle

… 11 The density of distal Purkinje fibres depends on their anatomical distribution, with the highest density near the … Purkinje cells could facilitate retrograde conduction and re-entry arrhythmia within the Purkinje network. Studies have …

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Article

Drivers of Atrial Fibrillation: Theoretical Considerations and Practical Concerns

… hope of identifying targets for catheter ablation therapy. Re-entry as a Mechanism Underlying AF While watching the exposed … In 1921, Lewis et al. hypothesised that re-entry around anatomical structures, or functional re-entry around an …

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Article

The Human Atrioventricular Node: Oedipus and the Riddle of the Sphinx

… Perhaps the same can be said about atrioventricular nodal re-entrant tachycardia (AVNRT): it represents the most common … in humans; since 1973 it has been associated with re-entry within or around the node; 2 and still, its exact … Becker on the inferior nodal extensions, not much human anatomical data on the detailed structure of the human AV …

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Article

Limitations and Challenges in Mapping Ventricular Tachycardia: New Technologies and Future Directions

… entrainment subsequently performed to not only confirm re-entry as the arrhythmia mechanism but to allow for accurate … cardiomyopathy is illustrated in Figure 1 . Electro-anatomical mapping and advances in catheter technology have …

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Article

Anisotropic Cardiac Conduction

… conduction block (UCB), which is a prerequisite for re-entry, the likelihood of propagation of ectopic foci of … movement in cardiac tissue without the involvement of an anatomical obstacle. Circ Res 1977;41:9-18. Crossref | PubMed …

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Science Linking Pulmonary Veins and Atrial Fibrillation

… have demonstrated that the electrophysiological and anatomical characteristics of PVs create a proarrhythmogenic … discussed in more detail below (summarised in Figure 2 ). Re-entry Multiple studies have demonstrated that re-entry in the …

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Arrhythmia Mechanisms Revealed by Ripple Mapping

… have enabled the display of the cardiac chambers as an anatomical shell upon which voltage, or activation, … show the bar starting to move when the late portion of the re-entrant circuit reaches the isthmus and it will continue … ablation creates scar tissue forming a substrate for re-entry. 13 AT mapping aims to define this re-entrant circuit …

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Article

Catheter Ablation for Ventricular Arrhythmias

… for long-term management, particularly for scar-related re-entrant arrhythmias. 3 In addition, antiarrhythmic drugs … output pacing is performed prior to ablation along the anatomical course of the nerve to assess proximity of the … sustained monomorphic VT associated with heart disease. Re-entry, involving channels formed by surviving muscle bundles …

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