title: Autocorrelation and spectral analysis of cardiac sinus rhythm.
mesh_terms: D001146:Arrhythmia, Sinus / Q000503:physiopathology*; D002302:Cardiac Output; D003201:Computers; D004562:Electrocardiography; D006331:Heart Diseases / Q000503:physiopathology*; D006334:Heart Function Tests; D006339:Heart Rate; D006801:Humans; D011187:Posture; D012849:Sinoatrial Node / Q000502:physiology*; D013057:Spectrum Analysis