title: Estimating heart rate and RSA from the mattress-recorded kinetocardiogram.
abstract: This article describes a method for extracting heart rate (HR) and respiratory sinus arrhythmia (RSA) from the kinetocardiogram (KCG) recorded from accelerometers embedded in a mattress topper. Validation has been performed via comparison with simultaneously recorded ECG. All-night estimates of HR and RSA magnitude derived from both methods were highly correlated. KCG-derived estimates of HR were slightly lower, and those of RSA magnitude higher, than those derived from ECG. These biases are consistent with the need to constrain KCG estimation to periods free of body movement. Mattress actigraphy represents a zero-burden method of obtaining intensive longitudinal indices of cardiac status.
authors: National Center for PTSD, Clinical Laboratory and Education Division, VA Palo Alto HCS, Menlo Park Division, Menlo Park 94025, and Department of Psychiatry and Behavioral Sciences, Stanford University, California, USA. steve.woodward@va.gov
authors: Steven H
authors: SH
authors: Woodward
authors: Ned J
authors: NJ
authors: Arsenault
authors: Karin
authors: K
authors: Voelker
authors: Tram
authors: T
authors: Nguyen
authors: Janel
authors: J
authors: Lynch
authors: Greg
authors: G
authors: Leskin
authors: Javaid
authors: J
authors: Sheikh
mesh_terms: D000328:Adult; D000465:Algorithms; D001145:Arrhythmias, Cardiac / Q000503:physiopathology*; D004562:Electrocardiography; D005260:Female; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010275:Parasympathetic Nervous System / Q000503:physiopathology; D017286:Polysomnography; D015203:Reproducibility of Results; D012894:Sleep Stages / Q000502:physiology