Despite a decrease in voltage amplitude in post-infarction scar areas, greater voltage amplitudes are sometimes observed at the time of local extrasystoles mechanically induced by catheters.

However, no study has investigated whether these electrical changes are associated with mechanical changes in local contractility.

However, the voltage is closely correlated to the local contractile function as evidenced by the use of the NOGA system.

Inclusion Criteria:

- Patients who should undergo ventricular tachycardia (VT) ablation after a myocardial infarction according to current recommendations, namely: patients with ischemic heart disease (ICD) and with episodes of sustained ventricular tachycardia responsible for internal electric shocks by the implantable automatic defibrillator (ICD) (grade IB recommendation)

OR

• patients with an MIC and an ICD, presenting a first episode of sustained ventricular tachycardia (grade IIa, B recommendation)
• Affiliated with a social protection scheme
• Having signed an informed consent

Exclusion Criteria:

• Contraindication or non-indication for ventricular tachycardia ablation
• Women who are pregnant or of childbearing age and without contraception, breastfeeding women
• Patients without ischemic heart disease
• Patients under guardianship, curatorship or legal protection.