Analysis for the Influence of ABR Sensitivity on PTT-Based Cuff-Less Blood Pressure Estimation before and after Exercise

Table 2

The pseudocode of BRS calculation.

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Initialize

The sliding-window start data-point number

Searching the sliding window:

Set inside-window start data-point number

 Repeat

  ,

 if (dRRi() < 0 and dSBP() < 0)

  Register in the first-quadrant array

 else if (dRRi() > 0 and dSBP() > 0)

  Register in the third-quadrant array

 Until

Calculate the regression coefficient between dRRi (i) and dSBP (i) in the first-quadrant and third-quadrant separately: R₁ and R₂

 BRS in the sliding-window is calculated as:

 BRS  = (R₁ + R₂)/2, .

go to Searching the sliding window;

until the last data-point is reached

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