Clinical experience with a novel multielectrode basket catheter in right atrial tachycardias.

"Cristal tachycardias": origin of right atrial tachycardias from the crista terminalis identified by intracardiac echocardiography.

OBJECTIVES We sought to use intracardiac echocardiography (ICE) to identify the anatomic origin of focal right atrial tachycardias and to define their relation with the crista terminalis (CT). BACKGROUND Previous studies using ICE during mapping of atrial flutter and inappropriate sinus tachycardia have demonstrated an important relation between endocardial anatomy and electrophysiologic even...

Pulmonary Vein Isolation with a Multielectrode Basket Catheter

Pulmonary vein (PV) isolation (PVI) techniques have evolved as a curative treatment of atrial fibrillation (AF) since PVI guided by circumferential mapping with a circular catheter was initially proposed. A multielectrode basket catheter (MBC) is also useful for PVI because of some advantages; (1) an MBC provides some information about the PV anatomy on the fluoroscopic image, (2) an MBC can ut...

Right atrial tachycardias related to regions of low-voltage myocardium in patients without prior cardiac surgery: catheter ablation and follow-up results.

AIMS There are only few descriptions of patients without prior cardiac surgery in whom a large low-voltage zone (LVZ) or scar is the electrophysiological substrate for various atrial tachycardias. We describe the electrophysiological and electroanatomic characteristics of unusual macroreentrant atrial tachycardias (MRATs) in seven patients with spontaneous right atrial (RA) scarring and present...

A Novel Criterion for Conduction Block after Catheter Ablation of Right Atrial Tachycardia after Mitral Valve Surgery Running title: Atrial tachycardias after mitral valve surgery

Mapping of atrial activation with a noncontact, multielectrode catheter in dogs.

BACKGROUND Endocardial mapping of sustained arrhythmias has traditionally been performed with a roving diagnostic catheter. Although this approach is adequate for many tachyarrhythmias, it has limitations. The purpose of this study was to evaluate a novel noncontact mapping system for assessing atrial tachyarrhythmias. METHODS AND RESULTS The mapping system consists of a 9F multielectrode-arr...