Cardiac PET scans are an effective diagnostic tool that enables us to visualise and evaluate the function of your heart muscle. Unlike traditional imaging methods, a PET scan offers detailed insights into blood flow and metabolic activity, allowing us to identify areas that may be problematic. This advanced imaging technique is especially useful for individuals suspected of having coronary artery disease, those with unexplained chest pain, or those who have previously suffered a heart attack. It plays a crucial role in assessing the viability of heart muscle following a cardiac event and in informing treatment decisions.
Procedure Overview
During a cardiac PET scan, a small amount of radioactive tracer is injected into a vein. This tracer travels to the heart, and the PET scanner detects the emitted signals. The scanner then creates detailed 3D images that show how the tracer is distributed within the heart muscle. We often use a combination of rest and stress imaging, where the stress is induced either through exercise or medication, to compare blood flow under different conditions. The procedure typically takes around one to two hours, including preparation and scanning time. We utilise state-of-the-art PET scanners that offer high resolution and accuracy, ensuring precise and reliable results.
Benefits & Importance
Cardiac PET scans offer several advantages over other imaging methods, such as SPECT scans or echocardiograms. PET provides superior image quality and greater accuracy in detecting and quantifying blood flow abnormalities. This is particularly crucial for identifying subtle changes that might be missed by other techniques. By providing a detailed assessment of myocardial viability, PET scans help determine whether a patient would benefit from revascularisation procedures like angioplasty or bypass surgery. This information directly impacts treatment planning and helps improve long-term heart health.
Preparation & Requirements
Prior to the scan, you’ll be provided with specific instructions, which may include fasting for several hours and avoiding caffeine and nicotine. It’s important to inform us about any medications you’re taking, as some may need to be temporarily discontinued. During the scan, you’ll lie on a table that slides into the PET scanner. You may experience a brief sensation of warmth or a metallic taste after the tracer injection. After the scan, you can resume your normal activities, although we recommend staying hydrated to help flush the tracer from your system.
Risks & Considerations
Cardiac PET scans are generally safe, but there are potential risks associated with the radioactive tracer, although the amount is very small. Allergic reactions to the tracer are rare. The stress component of the test may cause temporary chest pain or shortness of breath. PET scans are not recommended for pregnant or breastfeeding women. Certain medical conditions, such as uncontrolled diabetes or severe asthma, may also be contraindications. It’s crucial to discuss your medical history and any concerns with your doctor to ensure the procedure is appropriate for you.
Understanding your heart health is crucial for a long and fulfilling life. A Cardiac PET scan can provide invaluable insights into your heart’s function, enabling us to tailor a personalised treatment plan.