Hypertension is abnormally high blood pressure. High blood pressure puts extra strain on the heart, lungs, brain, and kidneys. It carries with it an increased risk of death and disability from coronary artery disease (CAD), stroke, heart failure, and kidney disease.
High blood pressure is very common but can't be seen or felt. Many people with high blood pressure don't know they have it. The best way to know if you have high blood pressure is to keep track of your numbers. You can get your blood pressure checked at your doctor's office, at home, or at your local pharmacy. It's important to get your blood pressure checked regularly.
Defining High Blood Pressure
High blood pressure is defined by 2 numbers (systolic and diastolic). The systolic or top number measures the pressure in your blood vessels when your heart beats. The diastolic or bottom number measures the pressure in your blood vessels when your heart rests between beats.
Systolic blood pressure (SBP) less than 120 mm Hg and diastolic blood pressure (DBP) less than 80 mm Hg are considered normal. Abnormal levels include:
- Prehypertension—SBP120-139 mm Hg or DPB 80-89 mm Hg
- Stage 1 hypertension—SBP 140-159 mm Hg or DPB 90-99 mm Hg
- Stage 2 hypertension—SBP more than 160 mm Hg or DBP more than 100 mm Hg
In people with diabetes or kidney disease, the targets numbers are lower. Check with your doctor to see what your target range should be.