Central and cerebrovascular effects of leg crossing in humans with sympathetic failure

Mark P M Harms, Wouter Wieling, Willy N J M Colier, Jacques W M Lenders, Niels H Secher, Johannes J van Lieshout

    20 Citationer (Scopus)

    Abstract

    Leg crossing increases arterial pressure and combats symptomatic orthostatic hypotension in patients with sympathetic failure. This study compared the central and cerebrovascular effects of leg crossing in patients with sympathetic failure and healthy controls. We addressed the relationship between MCA Vmean (middle cerebral artery blood velocity; using transcranial Doppler ultrasound), frontal lobe oxygenation [O2Hb (oxyhaemoglobin)] and MAP (mean arterial pressure), CO (cardiac output) and TPR (total peripheral resistance) in six patients (aged 37-67 years; three women) and age- and gender-matched controls during leg crossing. In the patients, leg crossing increased MAP from 58 (42-79) to 72 (52-89) compared with 84 (70-95) to 90 (74-94) mmHg in the controls. MCA Vmean increased from 55 (38-77) to 63 (45-80) and from 56 (46-77) to 64 (46-80) cm/s respectively (P
    OriginalsprogEngelsk
    TidsskriftClinical science (London, England : 1979)
    Vol/bind118
    Udgave nummer9
    Sider (fra-til)573-81
    Antal sider9
    DOI
    StatusUdgivet - 1 maj 2010

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