November 2015

Photoplethysmogram second derivative review: Analysis and applications

Photoplethysmogram (PPG) and its second derivative of the photoplethysmogram (SDPTG) are simple and low cost optical techniques for detecting and tracking blood volume changes. The PPG waveform and its SDPTG have been used by many scholars to obtain valuable information about heart and cardiovascular system. Since PPG and SDPTG reflect blood volume changes, much work has been done on its application as a diagnostic tool...

Author(s): Yousef K. Qawqzeh, Rubins Uldis and Mafawez Alharbi