Sudden cardiac death is a frequent cause of cardiovascular mortality. Numerous rhythmic risk assessment criterion have been described targeting the substratum, the cardiac nervous tone or the trigger of arrhythmias. Development of ventricular tachycardia ablation in the past few years show interesting results preventing the recurrence of ventricular arrhythmias.

Sudden cardiac death is a frequent cause of cardiovascular mortality. Numerous rhythmic risk assessment criterion have been described targeting the substratum, the cardiac nervous tone or the trigger of arrhythmias. Development of ventricular tachycardia ablation in the past few years show interesting results preventing the recurrence of ventricular arrhythmias.

Rhythmic risk assessment criterions have never been studied in relation with ventricular tachycardia ablation. The purpose of this study is to explore the modifications of these criterions after ventricular tachycardia ablation.

Inclusion Criteria:

• Patients undergoing ventricular tachycardia,
• patients with ischemic cardiomyopathy according to European Society of Cardiology Guidelines,
• patients with implanted cardiac defibrillator.

Exclusion Criteria:

• Contra-indication to stress test,
• permanent atrial fibrillation,
• permanent ventricular pacing,
• left bundle block.

people wich an Ventricular Tachycardia Ablation necessary and programed