ABPM stands for Ambulatory Blood Pressure Monitoring. It is a non-invasive method for measuring a person's blood pressure at regular intervals over a period of 24 hours or longer. This method allows doctors to track a patient's blood pressure throughout the day and night, providing a more comprehensive picture of their hypertension. It is done using a small, portable device that is worn on the person's wrist or upper arm. This device automatically takes blood pressure readings at regular intervals and records the results, which can then be analyzed by a healthcare provider. ABPM is used to diagnose and manage hypertension, as well as to monitor the effectiveness of treatment.