Catheter Ablation of Right Ventricular Outflow Tract Ventricular Tachycardia

Authors

  • Konstantinos Vlachos Second Department of Cardiology, Evagelismos General Hospital of Athens, Athens, Greece
  • Konstantinos P Letsas Second Department of Cardiology, Evagelismos General Hospital of Athens, Athens, Greece
  • Michael Efremidis Second Department of Cardiology, Evagelismos General Hospital of Athens, Athens, Greece
  • Antonios Sideris Second Department of Cardiology, Evagelismos General Hospital of Athens, Athens, Greece

Keywords:

transcatheter ablation, ventricular tachycardia, radiofrequency ablation, right ventricular outflow tachycardia

Abstract

Α 57-year-old female with repetitive monomorphic ventricular tachycardia was referred for an electrophysiological study. ECG during sinus rhythm was normal. ECG during tachycardia revealed a left bundle branch block (LBBB) pattern with inferior axis suggestive of an outflow tract tachycardia (Fig. 1). Structural heart disease was excluded. Transthoracic echocardiography and coronary angiography were unremarkable. The tachycardia was easily induced by atrial pacing (Fig. 2). This was suggestive of cyclic adenosine monophosphate (c-AMP) triggered activity as the pathophysiological basis of the arrhythmia. Activation mapping revealed the earliest activity at the posteroseptal region of the right ventricular outflow tract. A systolic pre-potential was recorded in this area, which is rarely seen in these type of arrhythmias (Fig. 3)... (excerpt)

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Published

2014-08-14

Issue

Vol. 9 No. 2 (2014)

Section

Images in Cardiology

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