Rate-dependent block in the sinus venosa of the swine heart during transverse right atrial activation: correlation between electrophysiologic and anatomic findings.

Unlabelled: Rate-dependent block in the sinus venosa.

Introduction: Whether the crista terminalis or the sinus venosa result in rate-dependent block during transverse activation of the right atrial activation remains unknown. In the present study, right atrial activation at different cycle lengths was studied in the swine heart using high-resolution noncontact mapping (Endocardial Solutions).

A clinical study of patients with and without recurrence of paroxysmal atrial fibrillation after pulmonary vein isolation.

Patients with paroxysmal atrial fibrillation (PAF) can be treated by pulmonary vein (PV) isolation. However, the recurrence rate after this procedure is relatively high. We sought to evaluate the quality of life (QOL) of patients with PAF recurrence after PV isolation and to analyze factors related to recurrences.

[Curative treatment of paroxysmal atrial fibrillation with radiofrequency ablation].

Background: Atrial fibrillation is associated with increased morbidity and twice the mortality compared to individuals without fibrillation. Treatment with antiarrhythmic drugs has limited effect in paroxysmal atrial fibrillation.

Material And Method: The group of patients comprised 59 men and 13 women with an average age of 51 +/- 10, the majority of whom had failed several drug regimens; some had undergone repeated DC conversions.

Global right atrial mapping delineates double posterior lines of block in patients with typical atrial flutter: a study using a three dimensional noncontact mapping system.

Unlabelled: Double Posterior Lines of Block in Typical Atrial Flutter.

Introduction: The crista terminalis (CT) has been shown to be a barrier to transverse conduction during typical atrial flutter (AFL). However, some studies have demonstrated the presence of functional block in the sinus venosa region but not at the CT.

V-A block during atrioventricular nodal reentrant tachycardia: reentry confined to the AV node.

Retrograde block during atrioventricular (AV) nodal reentrant tachycardia is considered a rare phenomenon that can potentially occur in the AV node or in the atrium. A patient with slow-fast AV nodal reentrant tachycardia and transient VA block localized in the AV node is presented. Pharmacological and stimulation maneuvers identified the site of block in the AV node and not in the atrium.