Method and system for measuring heart rate variability

摘要

A system for measuring heart rate variability (HRV) of a patent comprises:recording means for obtaining and regulating heartbeat-to-heartbeat intervals for a predetermined period of time;processing means for digitizing said intervals, forming a recurrence plot, and assigning a unit mass to each point on the plot representing a measured interval, and calculating the determinant by the expressionwherein:Qxx is the quadrupole moment relative to the X axis of the principal coordinate,Qyy is the quadrupole moment relative to the Y axis of the principal coordinate; andQdet is the product of Qxx and Qyy.