| Objective To observe the clinical ablation of idopathic ventricular taehycardia( IVT) . Methods According to 12 leads exterior ECG during IVT to locate the originated site, after interior electrophysiology , looking for the condition to stablize IVT. To apply activation mapping combined with pace mapping to symbolize the target, to seek P potential of IVT originnated from left ventricular septum, then symbolizing the target and ablation. Results 6 show RBBB with axis deviation left or severely right, its targets being in mid or inferior part of left ventricular septum. 6 have P potentials. 3 show LBBB with normal axis, its target being in the right ventricular outflow tract(RVOT). 1 shows LBBB with axis deviation left, originated from right ventricular inferior freewall part between inflow tract and apex. 1 LIVT with 1:1 atrioventricular conversel conduction resembling AVNRT was discovered combined with dual atrioventricular nodal pathways, being ablated slow atrioventricular nodal pathway first and then IVT. 1 diagnosed sarcoidosis before was induced two kinds of ventricular tachycadias from the right ventricle which one originated from the septum of RVOT, and the other from the right ventrivular inflow tract. ALL cases were ablated successfully with no severe complications and survivedduring followup periods. Conclusions Radiofrequency catheter ablation is an effective and safe technique in the treatment of idiopathic ventricular tachycardia, it can be selected as the first line treatment in patients with idiopathic ventricular tachycardia.
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