Systolic Blood Pressure (measured as part of a 24-hour ambulatory blood pressure monitoring test using the maximum rate of change in systolic pressure)

What This Test Measures

Your device records your systolic blood pressure at regular intervals throughout the day and night. The test specifically looks at how fast your systolic pressure increases, which can indicate how well your blood vessels respond to activity or stress.

Why It’s Done

Doctors may order this test if you have high blood pressure that doesn’t improve with medication, if you experience symptoms like dizziness or fainting, or if you have conditions like heart disease or kidney problems that affect blood pressure control.

What to Expect

You’ll wear a small device that measures your blood pressure automatically. It attaches to your wrist or waist and records readings every 15–30 minutes for 24 hours. You’ll continue your normal activities, but avoid removing the device unless instructed otherwise.

Preparation

No special preparation is needed. However, you should avoid removing the device and keep it on as directed. If you’re taking blood pressure medications, continue using them as prescribed.