BP	Blood pressure	M1	Modality 1 (PPG + ECG)
PPG	Photoplethysmography	M2	Modality 2 (PPG + BCG)
PTT	Pulse transit time	M3	Modality 3 (PPG + SCG)
PAT	Pulse arrival time	M4	Modality 4 (PPG + IPG)
PWV	Pulse wave velocity	M5	Modality 5 (PPG + SBS)
PEP	Pre-ejection period	M6	Modality 6 (PPG + ICG)
AO	Aortic opening	M7	Modality 7 (PPG + ECG + ICG)
ECG	Electrocardiography	M8	Modality 8 (PPG + ECG + BCG)
ICG	Impedance cardiography	M9	Modality 9 (PPG + SCG + GCG)
BCG	Ballistocardiography	M10	Modality 10 (PPG + ECG + SCG)
SCG	Seismocardiography	ME	Mean error
GCG	Gyrocardiography	SD	Standard deviation
IPG	Impedance plethysmography	MIMIC	Medical Information Mart for Intensive Care
SBS	Strain based sensor	AAMI	Association for the Advancement of Medical Instrumentation
MAP	Mean arterial pressure	HTN	Hypertension
SBP	Systolic blood pressure	NTN	Normotension
DBP	Diastolic blood pressure	ABP	Arterial invasive blood pressure
HR	Heart rate	CBP	Cuff blood pressure
PIR	PPG intensity ratio	FABP	Finger arterial blood pressure
HRPS	Heart-power spectrum ration	IEEE	Institute of Electrical and Electronics Engineers