title: Components of heart rate variability--what they really mean and what we really measure.
authors.forename: M
authors.initials: M
authors.lastname: Malik
authors.forename: A J
authors.initials: AJ
authors.lastname: Camm
mesh_terms: D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D013564:Sympathetic Nervous System / Q000502:physiology*; D014630:Vagus Nerve / Q000502:physiology*