title: In search of the optimal measure for assessment of parasympathetic control of heart rate.
authors.forename: Stuart D
authors.initials: SD
authors.lastname: Katz
mesh_terms: D000109:Acetylcholine / Q000502:physiology; D006334:Heart Function Tests; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D010275:Parasympathetic Nervous System / Q000502:physiology*; D011976:Receptors, Muscarinic / Q000502:physiology; D012849:Sinoatrial Node / Q000502:physiology
chemical_list: D011976:Receptors, Muscarinic; D000109:Acetylcholine