Cardiac imaging is a procedure that medical professionals use to capture images of the heart and evaluate its function and structure. It is a non-invasive but effective test that is popular in the medical community. Cardiologists use this test to diagnose heart illnesses and evaluate the patient's risk of contracting a heart-related disease in the future.
One of the more popular methods of cardiac imaging is echocardiography. Echocardiography requires the cardiologist to conduct an ultrasound of the heart using ultrasonic waves to identify any abnormalities. The medical professional performs the procedure by inserting the tip of an ultrasound probe into the patient's throat. Doctors then use the resulting image to examine the heart's chambers and thickness and whether it has enough fluids around the heart's lining to pump blood. Many medical professionals use echocardiography to check for lower pumping issues or damage to the valves after a heart attack.
While echocardiography uses ultrasonic waves to create an internal image of the heart, magnetic resonance imaging (MRI) uses magnets to achieve this goal. The magnets attract the hydrogen atoms inside the heart and cause them to align. The alignment of the atoms creates a faint electromagnetic signal that medical professionals may use to create an image of the heart, focusing more on the heart's tissue and blood vessels.
Medical professionals consider magnetic resonance imaging at a higher standard than echocardiography because cardiologists can conduct the test several times and still deliver exact or close measurements as opposed to echocardiography. MRIs are also better for detecting scar tissue on the heart.
However, patients must be aware that an MRI may be dangerous for people with heart implants like defibrillators and pacemakers. This is because the strong magnetic pulse of the MRI may throw off the implant's settings, which may damage the implant.
MRIs may be good for detecting abnormalities within the heart tissue, but computed tomography (CT) is much better for observing problems with the heart structure. Medical professionals commonly use computed tomography to examine plaque on the heart's walls. They also use the test to check for constriction of the arteries.
Computed tomography is a procedure that uses an x-ray to cover the examined area in the light, known as x-ray density. Doctors mostly use computed tomography for routine heart examinations. The procedure is more prominently among patients above 70 or younger with an increased risk of contracting heart diseases, such as smokers and drinkers.
Nuclear medical imaging is a form of cardiac imaging that uses radioactive substances to diagnose and care for heart diseases. There are two forms of nuclear imaging: positron emission tomography (PET) and single photon emission computed tomography (SPECT).
The major distinction between PET and SPECT is the type of radioactive material used during either procedure. While PET uses positron-emitting radioisotopes, SPECT uses gamma rays during its procedure. Both positron-emitting radioisotopes and gamma rays are injected into the bloodstream to provide imaging of the heart.
Nuclear imaging treatment may not be suitable for obese patients because of the amount of fat and tissue obstructing the radioactive material's passage. It is also important for patients to avoid drinking caffeine 24 hours before the procedure as it can affect the imaging results.
