How Can I Help Prevent Sudden Cardiac Arrest In My Elderly Mother, A Heart Patient Recovering From COVID-19?

Hello Doctor.. My 77 year old mother is suffering from covid 19 for last 7days.My quiry is,after recovery some cardio patients faces caridac arrest.My mother is also a cardiac patient.She takes 1.Cilacar t 2.Nitrocontin 6.4 3.Flavedon mr. 4.Nexito plus and 5.Ecosprin AV75. Please suggest me what should I do to prevent sudden cardiac arrest after her corona recovery.