Das Non-Contact Mapping-System ist ein neues Instrument zur Ablation komplexer Arrhythmien. Das System ermöglicht die 3-dimensionale visualisierte Darstellung von fokalen oder Reentryarrhythmien. Durch simultanes Mapping genügt theoretisch ein Schlag der Arrthythmie zur Erstellung der endokardialen Aktivierungs-Maps. Zu beachten sind der relativ breite Durchmesser sowie die potentielle Thrombogenität des Katheters.

Concomitant microwave ablation for curative treat ment of atrial fibrillation (AF) was performed in 18 patients with history of chronic atrial fibrillation and indication for open heart surgery, 11 patients with mitral valve replacement and 7 patients with coronary artery bypass grafting. There were no perioperative complications. During the postoperative period most of the patients had intermittent AF, they received low dose Sotalol therapy and electric cardioversions. Up to now seven patients have reached follow-up day 90. One patient has persistent AF. Two patients had typical atrial flutter that was electrically converted to sinus rhythm (SR), isthmus ablation is planned. The other four patients have SR, one patient without cardioversions. These four patients show recovered atrial function with observed A-wave for transmitral flow. Under visual guidance the continuous atrial lesion lines could be induced effectively and safely by the intraoperative device Lynx.

Catheter ablation using radiofrequency (RF) is a,widely accepted treatment option in patients with common type atrial flutter (AF). This case report describes a successful ablation of AF with a new closed cooled tip ablation in a 70-year-old woman with recurrent symptomatic AF. The ablation was performed during sinus rhythm. With a series of five energy applications bi-directional isthmus block was established. The procedure was well tolerated with no complications.