Conventional Versus Automated Measurement of Blood Pressure in the Office (The CAMBO Study)

Inclusion Criteria: * Both treated and untreated patients with systolic hypertension under routine FP care * For untreated patients, routine office SBP as measured by the patient's FP at the last routine office visit using a mercury device must have SBP ≥ 160 mmHg and DBP \<= 95 mmHg * For patients already receiving antihypertensive therapy, the last routine office BP as measured by the patient's FP using mercury sphygmomanometry must be SBP ≥ 140 mmHg and DBP \<= 90 mmHg Exclusion Criteria: * Presence of target organ damage such as MI, stroke, and serum creatinine twice normal * Diabetes mellitus treated with insulin or oral hypoglycemic therapy * Secondary hypertension * Participation in another research study involving measurement of BP * Patient's insistence on using self BP measurement outside of the study * Any conditions or circumstances which might preclude the successful completion of the study