As emerged from different clinical data, the risks to develop severe arrhythmias (ventricular tachyarrhythmia, ventricular fibrillation) is higher for 30 days after MI and NGF sympathetic hyper-sprouting is the main promoter of arrhythmias and ventricular dysfunction (Hu et al., 2014a; Pius-Sadowska and Machaliński, 2021). The gene discussed is NGF; the disease is cardiac arrhythmia.