OBSTRUCTIVE SLEEP APNEA (OSA) APPEARS TO BE AN INDEPENDENT RISK FACTOR FOR DIURNAL SYSTEMIC HYPERTENSION,1-3 although the biologic markers for this association have not been well worked out. Acute systemic blood pressure (BP) perturbations have been well described in association with obstructive events in patients with OSA,4-8 but arterial vasomotor activity, which may influence BP activity in ...
