3. At screening, patients should have hypertension, which is uncontrolled on medical treatment. Uncontrolled hypertension is an office blood pressure of 140 mm Hg systolic or 90 mm Hg diastolic or higher AND a self-measured blood pressure at home of 135 mm Hg systolic or 85 mm Hg diastolic or more. Practitioners will receive a weekly report on the self-measured blood pressure at home summarising the results of the run-in period.