Second derivative of photoplethysmogram d:a ratio

1. Hypertension is associated with second derivative of photoplethysmogram d:a ratio in humans (two-fold greater adjusted risks).

   “hypertensive subjects showed two-fold greater adjusted risks of having high D:A and low B:A ratios.”

   Humanshypertensive subjects vs normotensive subjectsn = 848

   Determinants of the second derivative of the finger photoplethysmogram and brachial-ankle pulse-wave velocity: the Ohasama study

   American journal of hypertension·1 Apr 2005

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