Differences in Pulse Timing and Amplitude

Dr. Julia Newton’s group in Newcastle (U.K.) reported results of testing 14 CFS (1994-Fukuda) patients and 14 IOPhealthy controls using non-invasive optical multi-site photoplethysmography to measure pulse timing and amplitude before and after a showed three-minute tilt test. Measurements were taken at ear, finger and toe sites. A significant reduction in the overall pulse timing response to controlled standing was found for the CFS group — 26% for CFS compared to 37% for controls. With more study and comparison to other disease groups with and without orthostatic intolerance, this non-invasive test could objectively distinguish CFS from healthy controls. (Physiologic Measurement, Jan. 25, 2011)

Tags: , January 25, 2011