An area of your body (the arm or groin) is cleaned and numbed with a local numbing medicine (anesthetic). The cardiologist passes a thin hollow tube, called a catheter, through an artery and carefully moves it up into the heart. X-ray images help the doctor position the catheter.Divya Heart Care Foundation Dr. Rasesh A. Pothiwala, the Director of Cardiovascular Sciences at Sterling Hospital, Ahmedabad and Chairman of Divya Heart Care Foundation, Ahmedabad, is a Cardiologist in Ahmedabad with over 20 years of experience. He has successfully performed over 60,000 CAG,