Transthoracic Epicardial Mapping and Ablation of Post-Infarction Ventricular Tachycardia: The Right Solution to the Problem?
The majority of sustained ventricular tachycardias after myocardial infarction (post-MI VT) are believed to originate from a reentrant circuit located at the subendocardium [1, 2]. Nevertheless, the functional role of the epicardium in maintaining some reentrant circuits has been well established, and data obtained from intraoperative mapping suggest that epicardial circuits are more common in post-inferior-wall MI [3, 4]. In these circumstances, conventional endocardial pulses of radiofrequency energy may be less effective . Accordingly, subepicardial target sites have been pointed to as one of the reasons for unsuccessful use of catheter ablation to treat patients with VT .
KeywordsVentricular Tachycardia Catheter Ablation Guide Wire Pericardial Effusion Radio Frequency Pulse
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