A health care provider likely will give instructions about how to prepare for a CT coronary angiogram. Driving yourself to and from the test should be OK.
FOOD AND MEDICATIONS:
Usually, the test requires not eating anything for about four hours before the test. Drinking water is OK. Don't drink caffeinated beverages 12 hours before the test because they can increase the heart rate, making it difficult to get clear pictures of the heart.
Tell your health care provider about the medications that you take. You might be asked not to take a particular medication before the test.
Coronary Angiogram Screening
Do not smoke or use caffeine for a few hours before the test. Your health care team gives you specific instructions.
When you arrive for the test, you may be asked to change into a medical gown. Do not wear jewelry around your neck or near your chest.