Attenuation of Isoproterenol-Mediated Vasodilatation in Blacks

There are racial and geographic differences in the incidence and severity of essential hypertension. In the United States, the prevalence of essential hypertension is greater among blacks than among whites at all ages after young adulthood 1 , 2 ; the higher prevalence among blacks is associated with greater morbidity and mortality. 3 A variety of genetic and environmental factors have been proposed to account for the racial differences in the prevalence and severity of hypertension. 4 – 6 Greater blood-pressure responses to mental and physical stress have been reported in normotensive blacks. 7 – 11 The heightened blood-pressure response generally occurs in conjunction with an increase . . .