Is there a conductive paste on the ECG normal electrode pads?

No. Conductive paste is a paste-like soft conductor, mainly used to reduce contact resistance, increase electrical conductivity, reduce heat generation, protect contacts and improve wear resistance, cardiac shock defibrillation or other cardiac shock treatment, will use medical devices containing conductive paste, conductive paste is applied to the electrode pads to ensure that all the energy of the shock is transmitted from the electrode pads to the heart, and to reduce the damage of the electric shock to other parts of the body.