What is a normal summed rest 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. When a perfusion defect is identified, its location, size, severity, and reversibility must be reported.
What is abnormal perfusion?
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.
What is an abnormal TID ratio?
The TID ratio is the stress volume : rest volume. Abnormally elevated TID ratio has been defined with abnormal cut-off values ranging from 1.12-1.22 2.
What is SSS score?
The global scoring of myocardial perfusion uses measures such as: the Summed Stress Score (SSS), the Summed Rest Score (SRS), and the Summed Difference Score (SDS). The SSS is the sum of the individual scores from the 17 segments of the polar map obtained during stress.
What is fixed defect on stress test?
A fixed defect is a perfusion defect present at stress and rest. Primary differential for a fixed defect includes scarring from infarction, chronically ischemic areas called hibernating myocardium, or attenuation.
What is a reversible perfusion abnormality?
Stress-induced perfusion abnormalities in regions that exhibit normal perfusion at rest are termed reversible perfusion defects, and such regions represent viable, ischemic tissue with blunted coronary blood flow reserve.
What is a normal TID ratio?
• Although normal TID ratios vary among publications, the value of. 1.19 is generally accepted as the upper limit, with some referring as. up to 1.3 in women. • In this case study, LV volume at stress = 59 mL; at rest = 45 mL, TID. ratio = 1.31 in a male patient, thus above normal limit.
What is TID score?
Transient ischemic dilation (TID) of the left ventricle (LV) is a marker for severe and extensive CAD 13, 14, 15, 16, which has been shown to be of prognostic value 17, 18. However, the prognostic value of TID in patients with an otherwise normal MPS has not been defined.
What is a reversible perfusion defect?
What are the 7 stages of the Bruce protocol?
Stages
- Level 1 – 10% Incline at 2.7 km/h.
- Level 2 – 12% Incline at 4.02 km/h.
- Level 3 – 14% Incline at 5.47 km/h.
- Level 4 – 16% Incline at 6.76 km/h.
- Level 5 – 18% Incline at 8.05 km/h.
- Level 6 – 20% Incline at 8.85 km/h.
- Level 7 – 22% Incline at 9.65 km/h.
- Level 8 – 24% Incline at 10.46 km/h.