What is Cardiac Viability PET-CT?

Cardiac PET-CT is done to specifically scan the heart muscles and detect any irregularities in the functioning of the heart. Doctors use Cardiac PET-CT to diagnose Coronary Artery Disease (CAD) and any damage caused to heart due to heart attack. PET-CT scan can particularly help in differentiating between the healthy and damaged heart muscles.  It uses the radiotracer (FDG) which produces pictures of the heart and effective imaging of the heart cell.

 

Preparing for the scan:

  • Fasting for minimum 6 hours with only a few sips of plain water if required. 
  • Diabetes medicine can be taken 24 hrs prior to procedure. 
  • Fasting Blood sugar levels have to be checked on the same day. The level should be less than 180 mg/dL. It is rescheduled if – greater than 200 mg/dL.
  • Avoid any intense and strenuous physical activity or exercise 24 hours before the scan. 
  • If in doubt about pregnancy, women patients should do a pregnancy test. If positive, PET-CT is generally not recommended.
  • Lactating women should pump and store their breast milk before a PET-CT scan. It is safe to breastfeed the child 24 hours after the scan.
  • Wear comfortable clothing and avoid jewellery on the day of the scan.

 

What to bring on the day of the scan:

  • Doctor’s prescription or note indicating the type of scan to be done.
  • Entire current medical file and prescription set to be aware of  any medical conditions and allergies, including details of treatment history.
  • All relevant previous CDs, reports and scan images (2D echo, Angiography, Angioplasty and all cardiac related reports)
  • Recent Blood sugar reports (preferable to do it on the day of the scan in our lab since it is most indicative of the blood sugar level at that time)
  • Only one accompanying person is recommended.
  • Home-cooked food for the patient to eat after the scan.

 

Time taken:

  • Total time: 4-6 hrs 
  • Waiting time after injection: With MIBI:  1 hr, PET-CT: 2-3 hr
  • Scan duration: With MIBI:  15 mins , PET-CT: 15 mins

 

How is the scan done?

A PET – CT scan uses a radioactive material (tracer) to produce 3D images of organs and areas within the body while they are working. The changes that take place are recorded in a sequential manner which is as follows 
  • After the registration formalities are completed, a Patient Care Co-ordinator will discuss the detailed patient history with you and you will have to share all the relevant treatment details, reports, and doctor’s prescription. You will be given a detailed explanation about the scan experience. At this point, you can get all your queries resolved.
  • Please bring along all your previous scans CDs as this is important for comparison.
  • The staff nurse will then prepare you for your scan by giving you the clothes required for the scan and asking you to remove all sorts of jewellery on you. 
  • Please do show your Blood Sugar reports during the history. If you don’t have these already, you can get them done at our pathology lab. The staff nurse will then prepare you for your scan by giving you the clothes required for the scan and asking you to remove all sorts of jewellery on you. 
  • The nurse then places a cannula in your vein to prepare for the radiotracer injection. In case of performing the  serum creatinine and blood sugar tests, the nurse will take a sample for it from the same cannula. This helps in avoiding repeated needle pricks for the patients. Depending on the type of scan, she might also ask you to drink some medicated water.
  • The radiotracer is pushed in the vein through the cannula. After the injection,you would be asked to relax and rest for an hour in a separate room at our centre. This will help the radiotracer to get absorbed in your body before you are taken for the scan.
  • Once you’re ready, you’ll be escorted into the  SPECT-CT scanning room which is the first part of the complete cardiac PET-CT scan. The Technologist will give you all the necessary instructions before the scan begins. Please do not worry, you are constantly being monitored.
  • The SPECT-CT scan generally takes around 25-30 minutes. After the SPECT-CT scanning process is completed the NM physician will evaluate the images from the scan.
  • After evaluating the images from the first scan, you will be taken for the second scan. In the second scan you will be asked to lie down on a PET-CT scanner table after your Injection waiting period is over. Medcare has a state of the art PET-CT scan machine which helps in getting the scan faster than it normally takes for it to be completed.Your scan here will take around only 15-20 minutes unless additional images are required.
  • After both the scans, the doctor checks the scan and gives instructions to the staff nurse to take you out of the room comfortably.
  • Sometimes, an additional delayed scan may be required. 
  • After receiving a good to go signal from the doctor you can change, eat something and have your medicines.

 

After the scan:

  • Patients can eat, drink and take medication
  • Patient is required to wait in the clinic for approximately half an hour after the scan, till the concerned staff confirms
  • It is best for the patient not to be close to children or pregnant women for the rest of the day to avoid exposing them to any radiation
  • The radiotracer leaves the patient’s body through urine or stool till 10-12 hours after the scan. Patients should drink a lot of water to help flush it out

 

For appointment call 8869906990 or write at contact@medcarediagnostics.com atleast 1 or 2 days prior to the required date of appointment. 
(if another scheduled patient has cancelled we may consider taking in walk-in patients. Do check in with our reception and our billing executives at our centre)

 

Important Note:

  • We may have to reschedule or cancel appointments at times because of reasons beyond our control – short-supply or no supply of the FDG used for the scan from an external source, machine breakdowns, etc. 
  • As we have no control over this situation, Medcare Diagnostics would not be held liable for any harm or loss arising out of such cancellations