Understanding Blood Pressure Categories

Blood pressure is one of the most important vital signs your body produces. It tells you how hard your heart is working to pump blood through your arteries. Understanding your numbers is the first step toward better cardiovascular health.

What Do the Numbers Mean?

A blood pressure reading consists of two numbers. The top number (systolic) measures the pressure in your arteries when your heart beats. The bottom number (diastolic) measures the pressure between beats, when your heart is resting. Both numbers are measured in millimeters of mercury (mmHg).

For example, a reading of 120/80 mmHg means your systolic pressure is 120 and your diastolic pressure is 80. Both numbers matter — an elevated reading in either can indicate a health concern.

The Four Categories

The American Heart Association (AHA) and the European Society of Hypertension (ESH) define four main blood pressure categories:

• Normal — Systolic below 120 AND diastolic below 80. This is the ideal range. Keep doing what you’re doing!
• Elevated — Systolic 120–129 AND diastolic below 80. Your blood pressure is higher than normal but not yet hypertension. Lifestyle changes can help bring it down.
• Stage 1 Hypertension — Systolic 130–139 OR diastolic 80–89. Your doctor may suggest lifestyle modifications and possibly medication depending on your overall cardiovascular risk.
• Stage 2 Hypertension — Systolic 140 or higher OR diastolic 90 or higher. This level typically requires medication along with lifestyle changes. Consult your doctor promptly.

When to See a Doctor

If your readings consistently fall in the Elevated or Stage 1 range, schedule an appointment with your healthcare provider. If you ever record a reading above 180/120, this is a hypertensive crisis — seek medical attention immediately.

Remember that a single high reading doesn’t necessarily mean you have hypertension. Blood pressure fluctuates throughout the day based on activity, stress, and other factors. That’s why tracking over time is so valuable.

How Heartitly Helps

Heartitly automatically categorizes every reading you log using these standard guidelines. Color-coded indicators (green for Normal, amber for Elevated, red for High) make it easy to see your status at a glance. Over time, the statistics screen reveals patterns — whether your morning readings tend to be higher, or if your blood pressure has been trending in a particular direction.

When you visit your doctor, you can export a PDF report of all your readings directly from the app. This gives your healthcare provider a complete picture of your blood pressure history, not just a single in-office measurement.