The percentage of the population which is elderly has been increasing steadily in many countries in the world; and as this tendency continues, the question of how to treat the elderly rises in importance. The problem of how to manage hypertension in the elderly has become one of the most important issues in the prevention and treatment of cardiovascular disease. However, not many of the cIinical studies performed so far to evaluate the effects of antihypertensive drug treatment have incIuded the elderly. Many important problems remain unsolved. How much bene- ficial effect can be expected from active antihypertensive drug treatment in the elderly? How can isolated systolic hypertension, which is fre- quently encountered in the elderly, have better prognosis when treated? When is drug treatment indicated, to what level should blood pressure be reduced and maintained in the e1derly, and how should drugs be selected? The elderly also frequently bear other medical problems, either re- cognized or unrecognized, such as mental depression, respiratory problems, infection, malignant neoplasms, and water and electrolyte im- balances. The body's ability to eliminate drugs also decreases with age and necessitates modified dosage. The 12th Scientific Meeting of the International Society of Hyperten- sion held in Kyoto, Japan on May 22-26, 1988 incIuded the satelIite symposium. "How Should Elderly Hypertensive Patients Be Treated?" wh ich focused on the pathophysiology and outcome of elderly hyperten- sive patients.