title: Normal sinus heart rate: sinus tachycardia and sinus bradycardia redefined.
authors.forename: D H
authors.initials: DH
authors.lastname: Spodick
mesh_terms: D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D001146:Arrhythmia, Sinus / Q000175:diagnosis*; D001919:Bradycardia / Q000175:diagnosis*; D005260:Female; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012016:Reference Values; D012737:Sex Factors; D013616:Tachycardia, Sinus / Q000175:diagnosis*