Before the day of the angiogram, physicians will gather information about the patient's medical history and any medications currently being taken. Individuals should inform their physicians if they are pregnant, trying to become pregnant or nursing prior to the test. In addition, patients should indicate if they have been diagnosed with any of the following:

Preparations for a cerebral angiogram may vary, depending on the status of the patient and the condition being diagnosed or monitored. Patients will be provided with the necessary preparation instructions, which may include:

• Refrain from eating for six to 12 hours prior to testing.
  
  
• Drink eight to 10 glasses of water (not juice or soda) in the 24 hours prior to testing.
  
  
• Make certain medication changes. Physicians may want patients to stop taking certain medications (e.g., aspirin) for a few hours/days prior to testing, or to simply change the dose or timing of the medication. Patients should bring their medications with them to the hospital, whether or not they have suspended that medication temporarily for the test.
  
  
• Undergo blood tests. Certain blood tests may be ordered prior to the procedure, including blood urea nitrogen (BUN), creatine and blood coagulation studies.
  
  
• Arrange for a ride to and from the testing site if it is being done as an outpatient.

On the day of the procedure, the patient will be admitted to the hospital, usually as an outpatient. The patient’s physician (usually a specialized radiologist) and other healthcare professionals will explain the procedure and answer any questions.