[Comparison of erythrocyte membrane Ca2(+)-Mg2(+)-ATPase activity in children with and without a family history of essential hypertension].

15 children with and without family history of essential hypertension respectively were chosen to compare erythrocyte membrane Ca2(+)-Mg2(+)-ATPase activity measured with biochemical method. Results were as follows: erythrocyte membrane Ca2(+)-Mg2(+)-ATPase activity was lower in children with family history of essential hypertension (2.16 +/- 1.10 vs 3.36 +/- 1.19 mumol Pi.mg protein-1/hour, P less than 0.01). This may be the cause of increase of intraerythrocyte calcium in offspring of hypertensive patients.