Minimum one year of experience in cardiac and diabetic segment is must. If you are coming from any specialty division and u have strong performance over there, you can go for this. Area Business Manger will take first round then ZBM will take final. After this HR call will be there and negotiation will take place. For ZBM round you must be indulge with your numbers and data of last company. Strong product knowledge, strong data knowledge of your last working territory and positive attitude it will help to cross your interview successfully.