Twenty-four-hour blood pressure changes in young Somalian blacks after migration to Italy.

Blood pressure changes induced by migration from Somalia to Italy were studied in 25 normotensive clinical healthy blacks (aged 29 +/- 6 years) who had immigrated from Mogadishu to Florence. Basal and 24-h ambulatory blood pressure, venous compliance, and daily urinary electrolyte excretion were measured on arrival and 6 months later. After 6 months both basal pressure (P < .05 for systolic blood pressure, P < .01 for diastolic blood pressure) and 24-h blood pressure (P < .004 for systolic blood pressure, P < .01 for diastolic blood pressure) had significantly increased. Urinary sodium excretion had also increased (P < .001), whereas plasma renin activity was significantly reduced (P < .05). The ambulatory pressure increase was significantly related to the urinary sodium increase (r = 0.49; P < .01). At follow-up 8 of 25 blacks were hypertensive according to the WHO definition (basal diastolic blood pressure > 90 mm Hg). In conclusion, an increase in 24-h blood pressure is detectable after immigration and changes seems to be mainly related to higher sodium intake in the Western diet.