Transcranial Doppler monitoring in hypertensive patients during physical exercise

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11 Citations (Scopus)

Abstract

Purpose: To evaluate the diagnostic value of a combined method, i.e. ergometer cycling with continuous bilateral transcranial Doppler monitoring (TCD) to detect cerebral hemodynamic abnormalities in recently diagnosed hypertensive patients. Methods: 30 neurologically symptom-free, nontreated patients with essential hypertension and 30 age- and sex-matched controls were studied. Carotid ultrasound, resting ECG and blood parameters were investigated. Cycling ergometry was performed according to the WHO protocol. Blood pressure, heart rate, end-tidal CO2 (etCO2) and bilateral middle cerebral artery (MCA) blood flow velocity (MV) were monitored. Results: At rest, MV in the MCA did not differ significantly between controls and hypertensive subjects. MV continuously increased in controls until the end of loading whereas a plateau was reached at 4 min in hypertensive subjects. During 6 min of cycling, the time course of absolute values of MV in the MCA and that of the changes in the ratio of mean velocity/end-tidal CO2 (ΔMV/ΔetCO2) differed significantly between hypertensive subjects and controls (p =0.03 and p =0.02, respectively). Conclusion: Ergometer cycling combined with TCD revealed altered vasoreactivity, therefore this may be a sensitive method for the detection of early hemodynamic impairment in nontreated hypertensive subjects.

Original languageEnglish
Pages (from-to)186-191
Number of pages6
JournalCerebrovascular Diseases
Volume12
Issue number3
DOIs
Publication statusPublished - Oct 27 2001

Keywords

  • Cerebral hemodynamics
  • Ergometer cycling
  • Hypertension
  • Transcranial Doppler

ASJC Scopus subject areas

  • Neurology
  • Clinical Neurology
  • Cardiology and Cardiovascular Medicine

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