Estimation of Blood Pressure by Using Electrocardiogram (ECG) and Photo-Plethysmogram (PPG)

In the current study, we found the relationship between blood pressure (BP) and pulse transit time (PTT). After measuring ECG and photoplethysmogram, the PTT was calculated from the acquired signals. Blood pressure (BP), the pressure exerted by circulating blood upon the walls of blood vessels, is an important physiological parameter and can provide some information for personal healthcare. Pulse transit time is the time taken for the arterial pulse Pressure wave to travel from the aortic valve to a peripheral site. It is usually measured from the R wave on the electrocardiogram to a photoplethysmography signal. PTT is inversely proportional to blood pressure. The mean error are 0.29 mmHg for SBP and 0.1mmHg for DBP. These results are satisfied with the regulation of ANSI/AAMI for certification of sphygmomanometer that real measurement error value should be within the mean error of ±5mmHg.