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Circadian blood pressure patterns in four cases with hemodynamic brain infarction and prolonged blood-brain barrier

D Sander1, J Klingelhöfer

  • 1Department of Neurology, Technical University of Munich, Germany.

Clinical Neurology and Neurosurgery
|September 1, 1993
PubMed

Insights

Pathological circadian blood pressure patterns, including nocturnal hypotension, were observed in patients with hemodynamic brain infarction. This condition prolonged blood-brain barrier disturbance, highlighting blood pressure variability

Area of Science:

  • Neurology
  • Cardiology
  • Vascular Biology

Background:

  • Hemodynamic brain infarction is associated with complex cardiovascular and cerebrovascular pathologies.
  • Circadian blood pressure variations and their impact on cerebrovascular integrity require further investigation.
  • Chronic arterial hypertension and reduced vasomotor reactivity are known risk factors for cerebrovascular events.

Observation:

  • Four patients presented with hemodynamic brain infarction, severe internal carotid artery stenosis, untreated chronic arterial hypertension, and impaired CO2-induced vasomotor reactivity.
  • Continuous 24-hour blood pressure monitoring revealed pathological circadian profiles characterized by elevated daytime hypertension and significant nocturnal hypotension (minimum 95/50 mm Hg).
  • A significantly increased diurnal variation in blood pressure was noted, exceeding 40% in one case, compared to control groups.

Findings:

  • The pathological circadian blood pressure patterns, particularly nocturnal hypotension, were linked to a prolonged disturbance of the blood-brain barrier in these patients.
  • Slow recovery of blood-brain barrier function was observed following pharmacological normalization of the abnormal circadian blood pressure rhythm.
  • Elevated blood pressure variability emerged as a critical factor in the pathophysiology of brain infarction development.

Implications:

  • Monitoring circadian blood pressure patterns offers potential prognostic and therapeutic value in managing patients at risk for brain infarction.
  • Understanding the role of blood pressure variability in cerebrovascular disease can lead to refined diagnostic and treatment strategies.
  • These findings underscore the importance of assessing 24-hour blood pressure dynamics beyond simple average values for neurological health.

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