isDiagnosticBiomarkerFor isMonitoringBiomarkerFor isDigitalBiomarkerFor isBiomarkerOfAging metric blood volume pulse Photoplethysmographic blood volume pulse (BVP) is a noninvasive sensor and is used to measure blood volume changes and vasodilator function in the microvessels of the finger. BVP is widely used to detect the peripheral pulse waveform that is converted to blood volume amplitude (BVA). Blood volume amplitude reflects arterial dilation and contraction that are controlled by the autonomic nervous system (ANS). https://pubmed.ncbi.nlm.nih.gov/24842231/ disease