Science Linking Pulmonary Veins and Atrial Fibrillation

… has been proposed that reentry, enhanced automaticity and triggered activity could all contribute to abnormal impulse generation. … PV re-entry, which may drive AF. 44 Automaticity and Triggered Activity As discussed previously, morphological …

Catheter Ablation of Polymorphic Ventricular Tachycardia and Ventricular Fibrillation

… strategy for intractable cases of ES due to focally triggered polymorphic ventricular tachycardia and VF. … apparent that every episode of polymorphic VT and VF was triggered by a short-coupled, monotopic ventricular premature … ectopy by 60-80 ms. CA completely suppressed ectopic activity and terminated ES without subsequent recurrences …

What is a Ca2+ wave? Is it like an Electrical Wave?

… al. 1 described contractile signals that appeared to be 'triggered' heart beats. Today we use the term delayed … [Ca 2+ ] of the SR. Hence, the oscillatory character of a triggered arrhythmia in myocardium with a high cellular Ca 2+ … ). In these cells the small voltage signals and triggered activity are sensitive to an agent that blocks Ca 2+ release …

Arrhythmias from the Right Ventricular Moderator Band: Diagnosis and Management

… network specifically have been identified as a source of triggered malignant VF. 4,5,8 Haissaguerre et al. described … by several mechanisms including enhanced automaticity, triggered activity and re-entry. 16 In the genesis of PVCs, triggered …

Session 1: Mechanisms of Atrial Fibrillation: Some New Perspectives

… Potential Properties of Pulmonary Veins Promote Ectopic Activity and Reentry Download Display full size The study is … Importantly, delayed afterdepolarisations and triggered activity are likely the principal source of atrial premature complex generation. Triggered activity due to abnormal calcium handling is the …

The Role of Flecainide in the Management of Catecholaminergic Polymorphic Ventricular Tachycardia

… to polymorphic VT or ventricular fibrillation typically triggered by exercise or emotions in the absence of … tachycardia (VT) or ventricular fibrillation typically triggered by exercise or emotions in the absence of … resulting in delayed afterdepolarisations and triggered activity, which is most pronounced during states of …

Percutaneous Treatment of Non-paroxysmal Atrial Fibrillation: A Paradigm Shift from Pulmonary Vein to Non-pulmonary Vein Trigger Ablation?

… strategies targeting localised, organised re-entrant activity (e.g. high frequency areas and rotors). 8 From a … beats triggering AF, owing to abnormal automaticity, triggered activity, or micro-re-entry. This mechanism has … durations, and delayed afterdepolarisation-induced triggered activity of atrial tissue is responsible for the …

Pharmacological Tests in Atrial Fibrillation Ablation

… Haissaguerre and colleagues demonstrated that AF is a triggered arrhythmia initiated by rapid repetitive … procedures to directly eliminate spontaneous focal ectopic activity within the PVs. However, early AF recurrences from … that sites of AF initiation and/or maintenance (e.g. triggered activity and micro re-entry) are frequently located …

Acquired Long QT Syndrome and Electrophysiology of Torsade de Pointes

Challenges Associated with Interpreting Mechanisms of AF

… re-entry , functional re-entry , hierarchical drivers , triggered activity , anarchical multiple wavelets , Disclosure: CHR … of either impulse initiation by automaticity or triggered activity, or re-entrant activity) and a substrate …