Table 1.
Results | Grading | Value | Definitiona |
---|---|---|---|
15. Blood flow response to tilt | |||
Normal | 0 | ||
Mild | 1,2 | ||
Abnormal | Moderate | 3–4 | |
Severe | >4 |
Using mean CBFV. CBFV should be measured at baseline, and at 1, 5, and 10 min of tilt.
aAt each measurement, assign the value 0 for normal results. Abnormal results are defined as CBFV less than normal limit. Normal limit is defined as follows:
At 1 min: normal decline in CBFV ≥ 90% of baseline. Assign 1 for CBFV 80–89% of baseline, 2 for 70–79% of baseline, and 3 for <70% of baseline.
At 5 min: normal decline in CBFV ≥ 89% of baseline. Assign 1 for CBFV 79–88% of baseline, 2 for 69–78% of baseline, and 3 for <69% of baseline.
At 10 min: normal decline in CBFV ≥ 86% of baseline. Assign 1 for CBFV 77–85% of baseline, 2 for 67–76% of baseline, and 3 for <67% of baseline. Total score is obtained by sum of all scores. Revised after (Novak, 2015).