We determined the effect of relaxation therapy for hypertension in patients whose blood pressure remained elevated despite the use of antihypertensive medication. The effect was assessed in multiple settings, including the relaxation therapist's office, the Hypertension Clinic, and the patient's natural environment, the latter using 24-hour automated ambulatory blood pressure measures. Nineteen patients were randomized either to temperature biofeedback-assisted relaxation or to an attention control, "stress education". Antihypertensive medication was kept constant. In the behavioral therapist's office, blood pressure decreased in equivalent amounts with both treatments. Hypertension Clinic nurse blood pressure remained stable or increased with both treatments, but again there was no difference between treatments. Ambulatory blood pressure increased with relaxation therapy and decreased with stress education, the effect being significant for diastolic pressure. The effects on ambulatory blood pressure were limited to the waking hours. The only variable that showed superior effects for relaxation therapy was physician-determined blood pressure. These results call into question the generalizability of the effects of relaxation therapy from one setting to another.

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