Ambulatory blood pressure (ABP) monitoring involves measuring blood pressure (BP) at regular intervals
(usually every 20–30 minutes) over a 24 hour period while patients undergo normal daily activities, including
sleep. The portable monitor is worn on a belt connected to a standard cuff on the upper arm (Figure 1) and
uses an oscillometric technique to detect systolic, diastolic and mean BP as well as heart rate.1 When
complete, the device is connected to a computer that prepares a report of the 24 hour, day time, night time,
and sleep and awake (if recorded) average systolic and diastolic BP.