Circadian changes in vascular sympathetic activity in ambulant subjects

Raffaello Furlan, Wilma Crivellaro, Simonetta Dell'Orto, Elisa Gentile, Simona Piazza, Maria R. Pagani, Mauro Tinelli, Sergio Cerutti, Federico Lombardi, Massimo Pagani, Alberto Malliani

Research output: Contribution to journalArticlepeer-review


In 10 ambulant subjects we studied the circadian changes in sympathetic vasomotor control as assessed by the spectral power of the 0.1-Hz low-frequency component of systolic ar-terial pressure variability measured with a Millar ø3F tip trans-ducer. The low-frequency component was higher during the day-time, while the subjects were performing light physical activity, and lower during the night, thus paralleling the circadian systolic blood pressure pattern. However, the morning low-fre-quency rise preceded the blood pressure increase by about 3h, suggesting that vasometer control and blood pressure control are at least partly related to different mechanisms.

Original languageEnglish
Pages (from-to)S30-S31
JournalJournal of Hypertension, Supplement
Publication statusPublished - 1989


  • Ambulatory blood pressure recording
  • Circadian sympathetic activity
  • Spectral analysis

ASJC Scopus subject areas

  • Physiology
  • Cardiology and Cardiovascular Medicine
  • Internal Medicine
  • Endocrinology


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