1. There was no significant change in plasma renin activity over 6 h in five subjects given calcium gluconate or in four subjects given parathyroid hormone.

2. It is concluded that acute hypercalcaemia does not increase plasma renin activity and is unlikely to play a role in the hypertension found with primary hyperparathyroidism.

Keywords:
calcium, hypertension, parathyroid hormone, plasma renin activity
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© 1976 The Biochemical Society and the Medical Research Society
1976
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