What is a normal summed stress score?
What is a normal summed stress score?
Summed stress scores of less than 3 are considered normal, whereas scores of 4–7, 8–12, and 13 or higher are indicative of low, intermediate, and high risk for a hard cardiac event.
What is a fixed apical perfusion defect?
A fixed perfusion defect with preserved wall motion can be attributed to soft tissue attenuation artifact, such as breast attenuation or inferior wall attenuation caused by the diaphragm, ascites, large pleural effusions, or by other abdominal visceral structures.
What is normal myocardial perfusion?
The average pixel-wise myocardial perfusion reserve (MPR) was 2.5±0.7. The coefficient of variation (CV) was 0.61 and 0.33 for global stress and rest perfusion, and 0.28 for MPR. The skewness test confirmed the normal distribution of stress and rest perfusion values (1.8 and 1.03, respectively; Figure 1).
What does abnormal myocardial perfusion mean?
Abnormal results may mean your heart isn’t pumping as well as it should. This might happen when you have heart damage or heart disease. Myocardial perfusion scans help us diagnose: Coronary artery disease. Heart failure.
How do I read my stress test results?
Possible Conclusions
- Positive or abnormal: Doctors may conclude the stress test is positive for cardiac ischemia—meaning the heart muscle wasn’t getting adequate oxygenated blood during the stress.
- Negative or normal: A negative test result lacks any of the things that could trigger a positive conclusion.
What are good nuclear stress test results?
Normal or abnormal, what does it mean? A normal test result indicates there is sufficient and unrestricted blood flow to your heart, both during periods of rest and exercise. Generally, there’s little concern for coronary artery disease and, in most cases, you won’t require any further testing.
What is the apical region of the heart?
The apex (the most inferior, anterior, and lateral part as the heart lies in situ) is located on the midclavicular line, in the fifth intercostal space. It is formed by the left ventricle. The base of the heart, the posterior part, is formed by both atria, but mainly the left.
How accurate is a myocardial perfusion scan?
A mycocardial perfusion scan is an imaging study that shows how well blood flows through the heart muscle. The sensitivity, specificity and accuracy of cardiac imaging with single-photon emission computed tomography (SPECT) is between 44 percent and 70 percent depending on the blood vessels involved.
How do you read a nuclear stress test?
The test results will fall into one of three categories:
- Normal results will show no prior heart attack or evidence of blockage.
- Abnormal resting results may show evidence of a prior heart attack.
- Abnormal cardiac results with normal resting results indicate there is a blockage in the coronary artery.
Should I be worried about an abnormal stress test?
While generally accurate, stress tests can sometimes be misleading. They can give a result that ends up being a false positive, needlessly worrying a patient about coronary artery disease. On the other hand, they can deliver a false negative, giving the patient a false sense of security.
What is a good stress test score?
Low risk (score > 5) indicates a 5-year survival of 97%. Intermediate risk (score between 4 and -11) indicates 5-year survival of 90%. High risk (score < -11) indicates 5-year survival of 65%.
What is an abnormal stress test?
An abnormal result in both phases of your stress test is an indication that your heart’s blood flow is poor, regardless of your exertion level. The restricted blood flow suggests significant coronary artery disease.