PPG	Photoplethysmography
WHO	World Health Organization
CVD	Cardiovascular Disease
AHA	American Heart Association
ECG	Electrocardiography
PD	Photodiode
I2C	Inter Intergrated Circuit
SPI	Serial Peripheral Interface
ADC	Analog-to-Digital Converter
FIR	Finite Impulse Response
PPI	Peak-to-Peak Interval
PR	Pulse Rate
BMI	Body Mass Index
Se	Sensitivity
+P	Positive Predictivity
FDR	Failed Detection Rate
TP	True Positive
FN	False Negative
FP	False Positive