Controlling hypertension in the elderly

摘要

Hypertension is best defined as the level of blood pressure above which treatment does more good than harm. This information comes from the results of ran- domized controlled trials, i.e. the evidence base. However, we do not know the level of blood pressure At which treatment fails to confer an overall benefit. Such a level is predicted to exist, as at lower levels of Blood pressure, few gain by having cardiovascular Events prevented yet all are at risk of the adverse Effects of treatment.