title: [The day-night rhythm in the 24-hour blood pressure profile. A possibility of distinguishing between primary and secondary hypertension?].
abstract: Automatic 24-hour blood pressure measurements were undertaken in 60 patients with primary systemic hypertension (24 women, 36 men; mean age 51 +/- 23 years) and 105 with secondary hypertension (36 women, 69 men; mean age 51 +/- 24 years). The aim of the study was to ascertain whether the absence of a day-night blood pressure rhythm is a reliable sign that the hypertension is secondary or whether it can also occur in primary hypertension. None of the patients was receiving any treatment. Day-night rhythm was abolished in 10 patients with primary hypertension (16%) and in 65 of those with secondary hypertension (62%). But an analysis of 11 case reports indicated that in an individual case there is no absolute rule. While absence of the day-night rhythm points to secondary hypertension, there are numerous exceptions.
authors.affiliation: Medizinische Klinik I, Universität München.
authors.forename: K
authors.initials: K
authors.lastname: von Hoyningen-Huene
authors.forename: B
authors.initials: B
authors.lastname: Mack
authors.forename: P
authors.initials: P
authors.lastname: Gonschior
authors.forename: B
authors.initials: B
authors.lastname: Höfling
mesh_terms: D000328:Adult; D000368:Aged; D001794:Blood Pressure / Q000502:physiology*; D015924:Blood Pressure Monitors; D002940:Circadian Rhythm / Q000502:physiology*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D006973:Hypertension / Q000175:diagnosis* / Q000209:etiology / Q000503:physiopathology; D008297:Male; D008875:Middle Aged
vernacular_title: Tag-Nacht-Rhythmus im 24-Stunden-Blutdruckprofil. Möglichkeit zur Unterscheidung zwischen primärer und sekundärer Hypertonie?