CT Coronary Angiography of the Heart (CCTA)

What is a CT Angiogram of the Heart (CCTA)?
Traditionally, Catheter angiography (Heart Cath) has been used to examine coronary arteries, but in recent years CT technology has advanced into coronary imaging.   Coronary CTA is similar to a CT heart score, but in addition to identifying calcified plaque CCTA can also evaluate soft plaque (fatty deposits) in the walls of the artery.  As soft plaque builds it can leak into the vessel resulting in vulnerable plaque. Vulnerable plaques can lead to obstruction of blood flow, stroke, and/or a heart attack.

Research has demonstrated that a negative coronary CTA is a strong indicator that the patient does not have coronary artery disease.  Due to the non-invasive nature of CCTA, it will likely become the first diagnostic test to evaluate for the presence or absence of coronary artery disease, when clinically indicated. In patients with acute cardiac symptoms, catheter angiography is still preferred because immediate intervention, such as stenting a narrowed artery, can be performed at the same time.

What Can I Expect?

Exam Preparation

• No caffeine 12 hours prior to the examination.
• No cold medicine and withhold inhalers if possible.
• No solid food 4 hours prior to the exam.
• Drink water, there is no restriction on your water intake.
• If your heart rate is over 60 BPM, a Beta Blocker will be necessary to maintain a rate of 60 BPM or less. Optimal heart rate is 55-60 BPM. Click here to view Beta Blocker Guidelines.
• If claustrophobia is a concern, consider a sedative.  Contact your physician and make alternative arrangements for transportation.
• If you have an allergy to the IV iodinated contrast media
  you will need to be pre-medicated.
  Click here to view the Iodine Contrast Media Preparation Guide.
  

During the Exam

• Any metal that is within the area to be scanned will need to be removed.
• The technologist will insert an IV for the injection of the iodinated contrast media.
• During the scan your arms will be brought above your head and ECG leads will be attached to your chest.
• You will be asked to hold your breath for 10-20 seconds while the images are being taken.
• Exam should be completed within 10 minutes.

After the Exam

• Following your exam you will be asked to remain in the department until your IV has been removed.
• If a Beta Blocker was taken you may feel tired.
• Report will be forwarded to your doctor within 24 to 48 hours.

CT Coronary Angiography of the Heart Image

Please click on the thumbnail image below to view a larger image.