[The effect of pharmacologic blockade of serotonin receptors (S2) on arterial pressure in rats with 2 forms of hereditary arterial hypertension].

The influence of blockade of serotonin S2 receptors with ketanserin was studied in two strains of rats with inherited arterial hypertension: spontaneously hypertensive rats (SHR strain) and rats with inherited stress-induced arterial hypertension (ISIAH strain). It was found that peripheral injection of ketanserin produced a greater decrease of arterial blood pressure than i.c.v. administration. ISIAH rats were more sensitive to the hypotensive effect of ketanserin when compared to normotensive Wistar or SHR rats.