HDI – HemoDynamic Info

For patients

A simple test to understand your high blood pressure.

Your doctor may use a test called NICaS to see why your blood pressure is high. Knowing the reason helps your doctor choose the medicine that fits you.

Nurse checking a woman's blood pressure

Why it matters

The same number can have different causes.

A blood-pressure cuff gives one number. But high blood pressure can come from tight blood vessels, a heart that is working too hard, or both. NICaS helps your doctor see which one. That can mean finding the right medicine sooner, with fewer return visits.

What to expect

A couple of sensors, a couple of minutes.

No needles

Two small sensors go on your wrist and your opposite ankle.

Stay dressed

You do not need to undress.

Just rest

You sit or lie still while the test runs.

Talk it over

Your doctor reviews the results with you and decides next steps.

Doctor talking with a patient during a blood-pressure check

After the test

A follow-up test shows if treatment is working.

At a later visit, your doctor may repeat the test to see whether your treatment is working, or whether it needs a change.

Clinician with a patient and a NICaS tablet

Common questions

Questions patients ask.

Ask your doctor about NICaS.

For women: blood pressure at every stage of life

This page is general information, not medical advice. Talk with your doctor about your blood pressure.