Preparing for the investigation
- Inform the team before making the appointment if there is something metallic in the body (rods, orthopedic surgeries, dental device, etc.)
- Do not eat anything 4 hours before the investigation
- Medications may be taken on the day of the examination
- On the day of the investigation bring the blood tests (creatinine + simple hemogram) together with the entire cardiological investigation file
- If the examination is one with adenosine, stress cardio-MR, it is recommended to stop drinking coffee, tea, cola or energy drinks 24 hours before the investigation.
How does Cardiac stress MR occurs?
The MR scan will take approximately 45-60 minutes. During this time you will sit comfortably in the machine, in a “tunnel”, not very long, open at both ends. You will hear periodic noises as we purchase your heart’s images, so we will protect your hearing with headphones through which you can listen to the radio or one of your favorite albums. We will stay in touch with you throughout the scan.
We will insert two branules (small plastic tubes) into the veins of the arms.During the scan we will inject a contrast agent. Usually, patients do not notice the injection of the contrast agent. At some point, we will announce that we are starting the injection of Adenosine, which is a medicine that increases blood flow and dilates the coronary arteries. This can cause a brief sensation of heat, difficulty breathing or chest discomfort. All these symptoms, if they occur, will usually disappear within a minute or two. A doctor will constantly monitor your heart activity and will constantly communicate with you during the Adenosine infusion.
Risks and discomforts
Magnetic resonance imaging (MRI) is safe and does not use X-rays or radiation. There are no known risks of this technique. Some people may suffer from claustrophobia (difficulty in being in tight spaces). Our staff will do their best to make you feel comfortable while scanning and will monitor you through a camcorder and audio link. If we cannot make you feel comfortable in the machine, we will not continue to scan and stop the exam.
The contrast agent we use is very safe but, as with any injection, reactions can occur. These include a sensation of heat at the injection site, nausea or vomiting and transient rashes. These effects usually last only a few minutes. People with a history of allergy are more likely to experience a more severe reaction, but this is rare (less than 1 in 3,000 cases). The department is equipped to deal with allergic reactions if occur.
Adenosine, the drug we use only in the case of stress CARDIO-MRI to increase blood flow to the heart; it can cause rashes, difficulty breathing and chest discomfort. However, all of these symptoms usually subside within one to two minutes or even faster if the drug is stopped.