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<p>COVID-19 is a systemic infection that causes endothelial dysfunction, contributing to severe cases. While vascular complications are well-documented, their impact on vascular structure, function, and cognition remains unclear. This cross-sectional study explored vascular and cognitive differences across patients with mild, moderate, and severe COVID-19, examining correlations between global cognitive performance and vascular parameters. This study included 83 working-age patients (30–65 years, both sexes) who recovered from COVID-19 within 6–12 months. They were grouped by severity: mild (outpatients, no oxygen support), moderate (hospitalized, conventional oxygen therapy), and severe (hospitalized, advanced oxygen therapy). Exclusions included pre-existing cognitive or neurological conditions, significant atherosclerosis, malignancies, and prior COVID-19 vaccination. Global cognitive function was assessed using the Montreal Cognitive Assessment (MoCA) test, while vascular parameters – carotid intima-media thickness (IMT), beta stiffness index (β index), mean flow velocity (MVs), maximum velocity after breath-holding (MV-BH), and breath-holding index (BHI) – were evaluated using duplex ultrasound and transcranial Doppler. Patients with severe COVID-19 had the highest carotid stiffness and poorest cerebrovascular reactivity. While MoCA scores showed no significant group differences, 23–40% had mild cognitive impairment. MoCA scores negatively correlated with β index in mild group (ρ=--0.453; <i>p</i> = 0.034), while MVs positively correlated with MoCA in severe cases (ρ = 0.414; <i>p</i> = 0.028). The association between arterial stiffness and cognitive impairment in mild cases, suggests lasting effects of SARS-CoV-2 rather than pre-existing conditions. These findings highlight carotid stiffness as a key factor in post-COVID-19 cognitive impairment, emphasizing early risk identification for timely intervention.</p>

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Cognitive and vascular (dys)function after COVID-19

  • 期刊论文

  • 发表日期：

    2025年9月15日

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  • Aleksandra Đ. Ilić,
  • Vladimir Galić,
  • Vojislava Bugarski Ignjatović,
  • Željka Nikolašević,
  • Dmitar Vlahović,
  • Goran Knezović,
  • Jasmina Boban,
  • Duško Kozić,
  • Željko Živanović

摘要

COVID-19 is a systemic infection that causes endothelial dysfunction, contributing to severe cases. While vascular complications are well-documented, their impact on vascular structure, function, and cognition remains unclear. This cross-sectional study explored vascular and cognitive differences across patients with mild, moderate, and severe COVID-19, examining correlations between global cognitive performance and vascular parameters. This study included 83 working-age patients (30–65 years, both sexes) who recovered from COVID-19 within 6–12 months. They were grouped by severity: mild (outpatients, no oxygen support), moderate (hospitalized, conventional oxygen therapy), and severe (hospitalized, advanced oxygen therapy). Exclusions included pre-existing cognitive or neurological conditions, significant atherosclerosis, malignancies, and prior COVID-19 vaccination. Global cognitive function was assessed using the Montreal Cognitive Assessment (MoCA) test, while vascular parameters – carotid intima-media thickness (IMT), beta stiffness index (β index), mean flow velocity (MVs), maximum velocity after breath-holding (MV-BH), and breath-holding index (BHI) – were evaluated using duplex ultrasound and transcranial Doppler. Patients with severe COVID-19 had the highest carotid stiffness and poorest cerebrovascular reactivity. While MoCA scores showed no significant group differences, 23–40% had mild cognitive impairment. MoCA scores negatively correlated with β index in mild group (ρ=--0.453; p = 0.034), while MVs positively correlated with MoCA in severe cases (ρ = 0.414; p = 0.028). The association between arterial stiffness and cognitive impairment in mild cases, suggests lasting effects of SARS-CoV-2 rather than pre-existing conditions. These findings highlight carotid stiffness as a key factor in post-COVID-19 cognitive impairment, emphasizing early risk identification for timely intervention.