[Dynamics of the poststress recovery of the contractile function and adrenoreactivity of the portal vein].

Emotional painful stress is accompanied by deep depression of portal vein spontaneous contractile function and by a considerable fall of its smooth muscle adrenoreactivity . The time course of post-stress recovery of these parameters was studied. The time course of changes in adrenoreactivity was correlated to the previously studied time course of the post-stress content of noradrenaline in the portal vein wall. Portal vein contractile function was shown to return to normal completely only at the 8th day after exposure to stress. The time course of the recovery of smooth muscle adrenoreactivity was discovered to be similar to that of the recovery of noradrenaline concentration, being wave-like in nature with "fading" fluctuations. Both the processes were found to be marked by the same line of changes.