Why is ambulatory blood pressure monitoring (ABPM) important?

ABPM (24-hour blood pressure monitoring) is a non-invasive test that measures arterial blood pressure continuously over a full day and night, under the real conditions of everyday life. Unlike a blood pressure measurement in the clinic, which shows only a single reading at one moment, ABPM shows your actual blood pressure values throughout the whole day, including periods of activity, stress, rest and sleep.

This test is particularly important because it detects blood pressure disorders that cannot be identified by a single measurement. Some people have normal readings in the clinic but raised blood pressure during the day (so-called masked hypertension), while in others blood pressure rises only in a medical setting (white-coat hypertension). ABPM helps to distinguish between these conditions and so prevents misdiagnosis and unnecessary or inadequate treatment.

ABPM is also key to assessing how well treatment is working in patients who are already taking antihypertensive medicines. It shows how stable blood pressure is over 24 hours, identifies morning surges in blood pressure and shows how blood pressure behaves during sleep. It is particularly important for detecting nocturnal hypertension – raised blood pressure during sleep, which often goes unnoticed but is a significant risk factor for stroke, kidney damage and other long-term complications.

The test is simple, safe and well tolerated. The patient wears a cuff connected to a small digital device that measures blood pressure at regular intervals, while the patient can walk, work and carry out everyday activities as normal throughout. The data obtained give the doctor a precise picture of the blood pressure profile during the day and night and allow informed decisions about further treatment or investigations.