نتایج جستجو برای: ectopic atrial

تعداد نتایج: 115433  

Journal: :Revista espanola de cardiologia 2006
Ignacio Fernández-Lozano Jorge Toquero-Ramos Cristina Escudero-Vela Evaristo Castedo-Mejuto Juan M Escudier-Villa Luis Alonso-Pulpón

INTRODUCTION AND OBJECTIVES Ectopic activity originating inside the pulmonary veins has been associated with paroxysmal atrial fibrillation in some patients. However, the roles played by the pulmonary veins and the posterior wall of the left atrium in maintaining atrial fibrillation are not well understood. METHODS Our aim was to determine whether there is a correlation between the refractory...

Journal: :European heart journal 2002
U Wetzel G Hindricks P Schirdewahn A Dorszewski A Fleck F Heinke H Kottkamp

AIMS We describe a new strategic stepwise mapping approach for fast and accurate identification and ablation of ectopic atrial foci using an electroanatomic mapping system. METHODS AND RESULTS Mapping procedures started with the acquisition of four points at the superior/septal part of the tricuspid annulus. According to this activation sequence, maps were continued towards the right atrial f...

Journal: :The European Research Journal 2022

Objectives: Atrial fibrilation (AF) develops from an arrhythmogenic ectopic focus, which triggers the vicious circle that creates arrhythmias. Arrhythmogenic foci are often located in transition areas between pulmonary veins and left atrial endothelium. This study aims to compare vein anatomy of patients with without AF using multidetector computed tomographic (MDCT) angiography evaluate relati...

Journal: :Circulation journal : official journal of the Japanese Circulation Society 2007
Sachiko Ito Hiroshi Tada Akihiko Nogami Shigeto Naito Shigeru Oshima Koichi Taniguchi

Radiofrequency catheter ablation was performed in 2 patients with atrial tachycardia (AT). In both cases the AT originated from the inferoseptal portion of the right atrium, and the cycle length was 210 ms. The surface ECG demonstrated common counterclockwise atrial flutter, probably caused by functional block in the clockwise direction at the cavo-tricuspid isthmus and posterior right atrium w...

Journal: :European heart journal 2001
C Pandozi M Santini

Atrial fibrillation is the most common arrhythmia in humans. The mechanisms underlying its induction and maintenance are not fully understood. However, it seems likely that, similar to sustained ventricular tachyarrhythmias, atrial fibrillation induction and maintenance are related to the presence of an anatomical and/or electrophysiological substrate, activated by specific triggers (ectopic be...

2015
Vassil B Traykov

Determining the chamber of origin of focal atrial tachycardias (FATs) arising at or close to the septum might require biatrial mapping. This review focuses on the available tools and methods used to distinguish right atrial from left atrial origin before left atrial access is obtained. These include analysis of P wave morphology, assessing the timing of right atrial septal activation, the seque...

Journal: :Cardiovascular research 2002
Akihiko Shimizu Osmar Antonio Centurion

It has been reported that ectopic foci from the pulmonary veins can initiate atrial fibrillation (AF) and can also act as drivers for maintaining AF. However, not all patients with atrial arrhythmias initiate AF. A substrate for atrial propensity to AF is required for AF initiation and maintenance. Thus, we reviewed and discussed mainly the electrophysiological properties observed in AF. Abnorm...

Journal: :Journal of atrial fibrillation 2015
Meruka Hazari Deepak Saluja

A 60-year-old male with a history of prior ablation of typical cavotricuspid isthmus-dependent atrial flutter presented to us with recurrent palpitations. The surface 12-lead EKG was consistent with atrial tachycardia, for which an ablation was planned. The patient was found to have multiple marcroreentrant left atrial tachycardias utilizing areas of scar as substrate. Isthmuses of tissue with ...

2013
Danina M Muntean Zsófia Kohajda Norbert Jost

Atrial fibrillation (AF), the most prevalent rhythm disorder in clinical practice, is currently significantly contributing to morbidity and mortality of the ageing population. In the past decades, a tremendous amount of research resulted in valuable insights into AF pathophysiology, with a primary focus on atrial remodeling. Defined as a persistent change in atrial function and structure, remod...

Journal: :European heart journal 2001
J E Waktare K Hnatkova S M Sopher F D Murgatroyd X Guo A J Camm M Malik

AIMS To characterize the nature and timing of atrial ectopics preceding clinical episodes of paroxysmal atrial fibrillation. METHODS AND RESULTS Holter recordings (n= 177, 60 patients, 58% male, mean age 61.7 +/- 11.5 years) were performed on patients with paroxysmal atrial fibrillation. These were subjected to standard analysis and recordings containing atrial fibrillation episodes suitable ...

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