Section | 1st derivative | 2nd derivative | Blood volume | Rate of bold volume change | Dominant pressure | Sub-dominant pressure | Remarks |
---|---|---|---|---|---|---|---|
PPi | Positive | Positive | Increase | Increase (faster) | Pi | – | Early-systole |
PNi | Â | Negative | Â | Decrease (slower) | Pi | Pm | Late-systole |
NNi | Negative | Negative | Decrease | Decrease (slower) | Pm | – | Early-diastole |
NPi | Â | Positive | Â | Increase (faster) | Pm | Po | Late-diastole |
PPr | Positive | Positive | Increase | Increase (faster) | Po | – | Early-reflection |
PNr | Â | Negative | Â | Decrease (slower) | Po | Pm | Â |
NNr | Negative | Negative | Decrease | Decrease (slower) | Pm | – | Late-reflection |
NPr | Â | Positive | Â | Increase (faster) | Pm | Po | Â |