title: The information content of succissive RR-interval times in the ECG. Preliminary results using factor analysis and frequency analysis.
mesh_terms: D003201:Computers; D004562:Electrocardiography; D005163:Factor Analysis, Statistical; D005583:Fourier Analysis; D006339:Heart Rate; D006801:Humans; D008722:Methods; D011603:Psychophysiology; D012119:Respiration; D013223:Statistics as Topic; D014937:Work