Nocturnal blood pressure in untreated essential hypertensives

Cesare Cuspidi, Carla Sala, Cristiana Valerio, Francesca Negri, Giuseppe Mancia

Research output: Contribution to journalArticlepeer-review

Abstract

Aim. Prevalence, correlates and reproducibility of nocturnal hypertension (NH) as defined by fixed cut-off limits in uncomplicated essential hypertension are poorly defined. Therefore, we assessed such issue in a cohort of 658 untreated hypertensives. Methods. All subjects underwent procedures including cardiac and carotid ultrasonography, 24-h urine collection for microalbuminuria, ambulatory blood pressure monitoring (ABPM), over two 24-h periods within 4 weeks. NH was defined according to current guidelines (i.e. night-time blood pressure, BP ≥ 120/70 mmHg) and non-dipping status as a reduction in average systolic (SBP) and diastolic BP (DBP) at night lower than 10% compared with daytime values. Results. A total of 477 subjects showed NH during the first and second ABPM period; 62 subjects had normal nocturnal BP (NN) in both ABPM sessions. Finally, 119 subjects changed their pattern from one ABPM session to the other. Overall, 72.5% of subjects had reproducible NH, 18% variable pattern (VP) and 9.5% reproducible NN. In the same group, figures of reproducible non-dipping, variable dipping and reproducible dipping pattern were 24%, 24% and 52%, respectively. Among NH patients, 56% of whom were dippers, subclinical cardiac organ damage was more pronounced than in their NN counterparts. Conclusions. In uncomplicated essential hypertensives, NH is a more frequent pattern than non-dipping; NH is associated with organ damage, independently of dipping/non-dipping status. This suggests that options aimed at restoring a blunted nocturnal BP fall may be insufficient to prevent cardiovascular complications unless night-time BP values are fully normalized

Original languageEnglish
Pages (from-to)335-341
Number of pages7
JournalBlood Pressure
Volume20
Issue number6
DOIs
Publication statusPublished - Dec 2011

Keywords

  • nocturnal hypertension
  • non-dipping
  • organ damage

ASJC Scopus subject areas

  • Internal Medicine
  • Cardiology and Cardiovascular Medicine

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