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Circadian blood pressure: clinical implications based on the pathophysiology of its variability

A J Peixoto1, W B White

  • 1Section of Nephrology, Yale University School of Medicine, New Haven, Connecticut 06516, USA. aldo.peixoto@yale.edu

Kidney International
|March 23, 2007
PubMed

Insights

Abnormal circadian blood pressure rhythms, like excessive morning surges or lack of nighttime fall (non-dippers), are linked to poor cardiovascular outcomes. Interventions targeting these rhythms, such as medication timing, may offer therapeutic benefits.

Area of Science:

  • Cardiology
  • Chronobiology
  • Hypertension Research

Background:

  • Circadian blood pressure (BP) rhythm abnormalities, including excessive morning BP surge and non-dipping (lack of nocturnal BP fall), are linked to adverse cardiovascular outcomes.
  • Pathophysiologic mechanisms involve sympathetic nervous system activity, salt/volume balance, and renin-angiotensin system activation.

Purpose of the Study:

  • To explore the pathophysiologic basis of abnormal circadian blood pressure rhythms.
  • To discuss potential clinical interventions, including lifestyle changes and antihypertensive drug therapy, to correct these abnormalities.

Main Methods:

  • Review of existing literature on circadian BP rhythms and their underlying mechanisms.
  • Discussion of pharmacological and non-pharmacological interventions.

Main Results:

  • Abnormal circadian BP patterns are associated with increased cardiovascular risk.
  • Sympathetic activity, salt/volume balance, and renin-angiotensin system activation are key contributing factors.
  • Medication timing and specialized delivery systems can potentially correct abnormal circadian BP patterns.

Conclusions:

  • Understanding the pathophysiology of circadian BP abnormalities is crucial for antihypertensive therapy design.
  • While not yet proven to improve outcomes, strategies to normalize circadian BP rhythms warrant consideration.

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