Abstract
For inquiring into relation between essential hypertension and catecholamine, the patients were divided into two groups according to their conditions of renal involvement, and changes of urinary catecholamine excretions and clinical effects were investigated by administrating sympathetic blocking agent and hypotensive diuretica and by increasing and decreasing of salt intake diet. From that results, it was observed that there were different reactivities for hypotensive diuretica and salt diet. Those differences came from different participation of catecholamine for vascular tone. That is to say, there seemed to be difinite biologic difference in the preserving mechanism for internal environment.
