Accidental Entrapment of Electrical Mapping Catheter by Chiari’s Network in Right Atrium during Catheter Ablation Procedure

Figure 1

(a) Regular 170 bpm narrow QRS tachycardia detected by Holter electrocardiography (ECG). (b) 12-lead ECG of the supraventricular tachycardia (SVT) (133 bpm) induced by an attachment of electrode catheter tip to the RA wall. 12-lead ECG showed intermittent complete right bundle branch block during both sinus rhythm and SVT. (c) Intracardiac ECG of SVT recorded during the catheter entrapment. SVT was induced with jump up phenomenon. We did not record His bundle electrocardiogram (HBE) to avoid further catheter entrapment. A: atrial electrogram, CS: coronary sinus, RA: right atrium, and V: ventricular electrogram.

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