A 5-year prospective, observational study of the withdrawal of antihypertensive treatment in elderly people.

Abstract

OBJECTIVES: To observe blood pressure, cardiovascular events, and total mortality after withdrawing antihypertensive treatment for elderly patients. DESIGN: Multicentre observational study. SETTING: Sweden. A 5-year follow-up of 333 elderly hypertensive patients, aged 70-84 years (mean age 75.2 +/- SD 3.8 years, 68% females). In all, 74 out of the 333 patients (22%) died during the study period. METHOD: After withdrawal of the antihypertensive therapy, all patients started in the untreated state and during the 5-year follow-up they could then either remain in the untreated state, or be reverted to blood-pressure-lowering drug treatment because of hypertension or other diseases, e.g. angina pectoris, oedema, congestive heart failure, etc. RESULTS: The probability of remaining without treatment for 5 years was estimated to be 20%. During the state of no treatment the patients had a lower total mortality risk than that of the general Swedish population, matched for age and sex. They also had a lower risk of cardiovascular events than those in the treated states. Markers indicating a successful withdrawal were monotherapy in low doses and relatively low blood pressure before withdrawal. CONCLUSION: These results suggest that with frequent check-ups, withdrawal of antihypertensive therapy in the elderly can be tried without increased risk of cardiovascular events.