How you prepareBy Mayo Clinic staff
Your doctor should give you instructions about how to prepare for your CT angiogram. Usually, you'll be asked not to eat anything for four to eight hours before your test. You can drink water, but avoid caffeinated drinks before your test, because they can speed up your heart rate. This can make it difficult for your doctor to get clear pictures of your heart.
You can drive yourself to the appointment, and you'll be able to drive home or to work after your test.
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