Ambulatory blood pressure monitoring records blood pressures periodically during normal activities. It is indicated primarily for diagnosis of suspected white coat hypertension (persistently elevated blood pressure readings in the office without evidence of end-organ damage) or to confirm a poor response to antihypertensive medication. It may also be useful in assessing for masked hypertension (evidence of end-organ damage without apparent elevated blood pressures) or for evaluating episodic or resistant hypertension.