Abbreviation	Definition
AC	aortic valve closure
AO	aortic valve opening
AS	peak of atrial systole
BCG	ballistocardiography
dHF-FCG	first derivative of HF-FCG
ECG	electrocardiogram
FCG	forcecardiography
FRG	forcerespirogram
GCG	gyrocardiography
HF-FCG	high-frequency component of FCG signal
HS-FCG	heart sounds component of FCG signal
IC	isotonic contraction
IM	isovolumic movement
KCG	kinocardiography
LF-FCG	low-frequency component of FCG signal
MC	mitral valve closure
MEMS	microelectromechanical systems
MO	mitral valve opening
PCG	phonocardiography
PEP	pre-ejection period
RE	peak of rapid systolic ejection
RF	peak of rapid systolic filling
SCG	seismocardiography