RADIOFREQUENCY CATHETER ABLATION FOR TREATMENT OF ATRIAL ARRHYTHMIAS

摘要

In this paper,electrophysiologic study and RFCA were attempted in 3 patientswho had clinical episodes of atrial arrhythmias with multiple ECG recordings.Diagnoses were automatic atrial tachycardia in one,reentrant atrialtachycardia in one,and typical atrial flutter in one.Site for atrial flutterablation was based on anatomic barriers in the floor of the right atrinm.Forautomatic atrial tachycardia,the site of earliest activation before the pwave was sought and for reentrant atrial tachycardia,our goal was to identifya site of early activation in a zone of slow conduction.At target sites,20 to40w of radiofrequency energy were delivered during tachycardia.Procedureend point was inability to reinduce tachycardia by atrial pacing and infusionof isoproterenol,Acute success was achieved in all of three patients.Fortachycardia involves reentry(reentrant atrial tachycardia and atrial flutter),successful ablation required severing an isthmus of slow conduction.Foratrial flutter,this was between the tricuspid annulus and the coronary sinus osor between the inferior vena cava and the tricuspid annulus.Abla-tioo ofautomatic and reentrant atrial tachycardia and atrial flutter had a highsuccess rate and caused no complications.Repeat procedures may be requiredfor long-term success,especially in patient with atrial flutter.