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[Cerebral microcirculation and structural changes in the brain in essential hypertension]

I Iu Efimova, I A Astanina, M V Kolodina

    Klinicheskaia Meditsina
    |March 1, 2005
    PubMed

    Insights

    Moderate arterial hypertension causes brain changes and reduced blood flow, even without symptoms. This study highlights the impact of hypertension on cerebral microcirculation and brain structure.

    Area of Science:

    • Neurology
    • Cardiology
    • Radiology

    Background:

    • Arterial hypertension (AH) is a significant risk factor for cerebrovascular diseases.
    • Early detection of cerebral changes in AH is crucial for timely intervention.
    • Subclinical changes in hypertensive patients require further investigation.

    Purpose of the Study:

    • To investigate cerebral microcirculatory and structural alterations in patients with moderate arterial hypertension.
    • To assess the correlation between hypertension and early signs of cerebrovascular insufficiency.
    • To identify specific brain regions affected by impaired perfusion and structural changes.

    Main Methods:

    • Single-photon emission computed tomography (SPECT) using (99m)Tc-hexamethylpropyleneaminoxyl for brain perfusion evaluation.
    • Magnetic resonance imaging (MRI) for detailed examination of cerebral structures.
    • Study included 32 patients (20 males, 12 females; age 37-63) with moderate arterial hypertension.

    Main Results:

    • Cerebral structural changes and perfusion impairments were observed in patients with moderate AH.
    • These changes were present even in the absence of clinical symptoms of cerebrovascular insufficiency.
    • Inadequate blood flow was most frequent in the parietal and temporal regions.
    • A reduction in cerebrovascular reserve was noted in the frontal lobes.

    Conclusions:

    • Moderate arterial hypertension is associated with subclinical cerebral microcirculatory and structural changes.
    • SPECT and MRI are valuable tools for detecting these early alterations.
    • Findings underscore the importance of managing hypertension to prevent potential cerebrovascular events.

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