the use of diagnostic and therapeutic methods for assessing pulmonary vein due to its status as a main source of ectopic beats for the initiation of atrial dysrrythmias is strongly recommended.   we report the case of a 13-year-old girl who was admitted to our hospital with the electrocardiogram manifestation of an ectopic atrial tachycardia. the focus of arrhythmia was inside the right upper p...

conclusions diagnosis of tachycardia-induced cardiomyopathy in children is important, since appropriate treatment improves the prognosis. every child with recurrent and persistent palpitation with the first episode of congestive heart failure should be evaluated for tachycardia- induced cardiomyopathy. introduction tachycardia-induced cardiomyopathy (tic) is a ventricular dysfunction secondary ...

OBJECTIVES The purpose of this study was to investigate the predictor of non-pulmonary vein (PV) ectopic beats initiating paroxysmal atrial fibrillation (PAF). BACKGROUND Non-PV ectopic beats can initiate PAF in some patients and play an important role in the recurrence of PAF after PV isolation. Information on the predictors of non-PV ectopic beats initiating PAF is unknown. METHODS This s...

Introduction Ectopic atrial tachycardia occurs at a rate of 5%–20% among children with supraventricular tachycardia. Atrial appendages are the most frequent focus in children, differing from the situation in adults. However, ectopic atrial tachycardia originating from aneurysms of the right atrial appendage is very rare and in fact has not yet been clearly defined. We describe 3 cases of childr...

Five cases of atrial ectopic activity associated with sinus bradyeardia are reported. The ectopic activity was abolished in all cases when the sinus rate was increased spontaneously or by atropine. The report demonstrated that the incidence of ectopic activity increases in the atrium at the slower basic rates as it does in the ventricle. It was emphasized that atrial ectopic activity associated...

INTRODUCTION AND OBJECTIVES The identification and ablation of atrial ectopic foci could complement the conventional empirical pulmonary vein approach and may increase the success rate of atrial fibrillation ablation. Although both adenosine and isoproterenol infusion have been reported to induce ectopics, no clear findings on their use during ablation have been published. Our aim was to invest...

BACKGROUND The mechanisms underlying paroxysmal atrial flutter/atrial fibrillation initiation by ectopic foci from various locations are unclear. METHODS AND RESULTS We used parallel computational techniques to study an anatomically accurate 3-dimensional atrial structure incorporating a detailed ionic-current model of an atrial myocyte. At the single-cell level, upregulation of the L-type Ca...

OBJECTIVES The objective of this study was to assess the spatial distribution of atrial ectopic foci potentially triggering recurrent atrial tachyarrhythmias after electrical cardioversion of long-standing atrial fibrillation (AF). BACKGROUND It remains unknown whether targeted ablation of atrial ectopic foci concentrated in the pulmonary veins is feasible in patients with long-standin

Atrial dissociation is characterized by two sets of independent P waves on the electrocardiogram and two atrial beats independent of each other. One atrium is under the control of the dominant pacemaker (sinus node) which also controls the ventricles, while the other atrium or part of the other atrium is under the control ofan ectopic pacemaker, resulting in unilateral ectopic atrial rhythm, be...

AIMS The purpose of this study was to calculate the prevalence of ectopic atrial tachycardia in a population of young asymptomatic males and to assess its natural course both in asymptomatic subjects and in symptomatic hospital patients. METHODS AND RESULTS 12-lead electrocardiograms (ECG) of 3554 consecutive males applying for a pilot's licence were analysed. ECGs of symptomatic arrhythmia p...