bjective To investigate the character of ambulatory blood pressure load and the relationship between different stages of hypertension and targetorgandamage (TOD)in the elderly. Methods Ambulatory blood pressure load during 24hours was measured by noninvasive ambulatory blood pressure mornitoring (ABPM) in 16 normal bloud pressure individuals,25 patients with stage one hypertension,34 patients with stage two hypertension ,and 27 patients with stage three hypertension in the e...