08/11/2021
APG provides important information regarding arterial stiffness. Increased stiffness is associated with most cardiovascular risk factors and established atherosclerosis.
In the waveform:
a and c are used to calculate others
b indicates how much blood the heart releases per beat. The lower the value is, the healthier the artery is.
d indicates how much blood still remains around the fingertips. The healthier the artery is, the less blood remains.