IL1B and Ventricular arrhythmia: In the control SD rats, there were no obvious ventricular arrhythmias on ECG, the cardiac tissue and mitochondria were basically normal, the serum IL-1β level was low, and the expression of myocardial IL-1β, NLRP3, ROS, p-TAK1, p-p38MAPK and p-NF-κB was weak.