Ambulatory Blood Pressure Monitoring (ABPM) is a diagnostic test that measures your blood pressure at regular intervals over a 24-hour period. While a standard clinic reading provides a single "snapshot," the ABPM uses a portable cuff and a small digital monitor to track how your blood pressure changes during work, sleep, and physical activity, providing a much more accurate average of your levels

This test is particularly useful for identifying blood pressure issues that "hide" during regular clinic visits, such as:

• White Coat Hypertension: When your blood pressure is high in a clinic setting due to anxiety but normal in daily life.

• Masked Hypertension: When clinic readings are normal, but blood pressure is dangerously high during daily activities or sleep.

• Nocturnal Hypertension: Detecting if blood pressure fails to drop at night ("non-dipping"), which can increase the risk of stroke.

• Medication Assessment: Evaluating how effectively your current blood pressure medication is working throughout the entire day.

The procedure is automated and integrates into your normal routine. A blood pressure cuff is wrapped around your upper arm and connected to a small monitor worn on a belt or shoulder strap. The device is programmed to inflate every 15–30 minutes during the day and every 30–60 minutes at night.​ You may be asked to keep a brief diary of your activities and sleep times so the doctor can correlate spikes in pressure with specific events

To ensure the 24-hour period goes smoothly, follow these guidelines:

• Clothing: Wear a loose-fitting top or a shirt with wide sleeves so the cuff can fit comfortably underneath.

• Physical Activity: You should go about your "normal" day, but avoid vigorous exercise or heavy lifting that might dislodge the cuff.

• Device Care: The monitor is not waterproof; you cannot shower, bathe, or swim while wearing it.

• Medication: Continue taking all your regular medications unless your doctor specifically tells you otherwise.