The most important factor is the doctor’s consultation. The patient should give complete details related to past medical history, present complaints etc. The patient also needs to undergo a few related checkups. Thereafter, the doctor will prescribe Coronary Angiography. A doctor will also ask you to follow general preparations like the patient should be on complete fasting (no food or water intake) for 6 hours before the test. If the patient is under some medication, the same should be consulted with the doctor.