We must implement 8 implantable cardioverter defibrillators (ICDs) to save a life in 3 years after myocardial infarction (MI) in primary prevention.

Left ventricular ejection fraction (LVEF) is proposed as the one tool predicting sudden cardiac death after MI.

Several studies have shown that impairment of spontaneous baroreflex sensitivity (BRS) after MI was predictor of sudden death.

Inclusion Criteria:

• Patients implanted with an implantable cardioverter defibrillator for primary prevention of of cardiac sudden death, ischaemic cardiomyopathy
• Implantable cardioverter defibrillators implantation for at least 3 years
• Age ≥ 18 years

Exclusion Criteria:

• ventricular or atrial pacing ≥1%,
• atrial fibrillation history
• age under 18 years