What your face says about your heartbeat

Physorg  January 29, 2018
When the heart circulates blood through the arteries and veins, the light absorbed by the skin changes by measurable amounts. Hemoglobin in the blood has an absorption peak for green light. When the heart pushes blood into arteries near the skin, more green light is absorbed and less is reflected. Researchers at Utah State University have invented a system that processes the color data and computes an average over regions of the image where skin is visible on the face, neck or arms. Future versions of the design could even replace hospital tools that monitor blood pressure or blood oxygen levels… read more. Open Access TECHNICAL ARTICLE