AHI	Apnea-Hypopnea Index
BMI	Body mass index
CD	Circulatory delay
CI	Confidence interval
CSR	Cheyne-Stokes respiration
EF	Ejection fraction
HF	Heart failure
HFrEF	Heart failure with reduced ejection fraction
HSAT	Home sleep apnea test
IQR	interquartile range
LECT	Lung-to-ear circulation time
LFCT	Lung to finger circulation time
OSA	Obstructive sleep apnea
PSG	Polysomnogram
SDB	Sleep-disordered breathing
Sec	seconds
Tcirc	Circulation time
TTE	Transthoracic echocardiogram
T88	Time in minutes with oxygen saturation <88%