A normal blood pressure reading, whether taken on the wrist or upper arm, is defined as a systolic pressure (the top number) below 120 mm Hg and a diastolic pressure (the bottom number) below 80 mm Hg.
Understanding Blood Pressure Readings
Blood pressure measurements consist of two numbers:
- Systolic pressure: This is the top number and represents the pressure in your arteries when your heart beats and pushes blood out.
- Diastolic pressure: This is the bottom number and indicates the pressure in your arteries when your heart rests between beats.
Both numbers are crucial for determining your blood pressure category.
Blood Pressure Categories
Blood pressure is categorized based on both systolic and diastolic readings. Here's a general overview of blood pressure categories:
| Top Number (Systolic) in mm Hg | And/or | Blood Pressure Category |
|---|---|---|
| Below 120 | and | Normal blood pressure |
| 120 to 129 | and | Elevated blood pressure |
| 130 to 139 | or | Stage 1 Hypertension |
| 140 or higher | or | Stage 2 Hypertension |
Accuracy of Wrist Blood Pressure Monitors
While wrist blood pressure monitors offer convenience, the definition of a normal blood pressure reading remains consistent regardless of the measurement site. The key to accurate readings with a wrist monitor lies in proper technique.
To ensure reliable results when using a wrist blood pressure monitor:
- Positioning is key: Always hold your wrist at heart level during the measurement. Rest your forearm on a table or support your arm with your hand if standing.
- Stay still: Sit quietly and avoid talking or moving during the reading.
- Relax: Ensure you are relaxed and have not exercised, consumed caffeine, or smoked within 30 minutes prior to the measurement.
- Take multiple readings: Take two or three readings a few minutes apart and calculate the average for a more accurate result.
- Cuff fit: Ensure the wrist cuff fits snugly but not too tightly.
When to Consult a Doctor
If you consistently get readings that fall outside the normal range, especially if they are elevated or indicate hypertension, it's important to consult a healthcare provider. They can provide a professional diagnosis and recommend an appropriate course of action, which may include lifestyle adjustments or medication.
