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Glossary
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| Term | Definition |
|---|---|
| Nuclear scan (thallium stress test) |
This test shows the working of the heart muscle as blood flows through the heart. A small amount of radioactive material is injected into a vein, usually in the arm, and a camera records how much is taken up by the heart muscle. |
| nuclear ventriculogram |
a test that uses a special camera to take a series pictures of the pumping chambers (ventricles) of the heart to check their size and blood-pumping ability; the most accurate test for measuring the pumping function of the heart; also known as radionuclide ventriculography or a multigated acquisition scan (MUGA) |
| NYHA Class 1 (Mild) symptoms |
Symptoms that cause no limitation of physical activity - ordinary physical activity doesn't cause tiredness, heart palpitations, or shortness of breath |
| NYHA Class 2 (Mild) symptoms |
heart disease symptoms that cause a slight limitation of physical activity – comfortable at rest, but ordinary physical activity results in tiredness, heart palpitations, or shortness of breath |
| NYHA Class 3 (Moderate) symptoms |
heart disease symptoms that cause marked or noticeable limitations of physical activity – comfortable at rest, but less than ordinary physical activity causes tiredness, heart palpitations, or shortness of breath |
| NYHA Class 4 (Severe) symptoms |
heart disease symptoms that cause severe limitation of physical activity – unable to carry out any physical activity without discomfort; symptoms also present at rest; if any physical activity is undertaken, discomfort increases |
| NYHA Classification |
a system used to grade the severity of heart disease symptoms (including heart failure) based on how much they limit your physical activity |
