Key Facts about Hypertension
- An estimated 1.28 billion adults aged 30–79 years worldwide have hypertension, most (two-thirds) living in low- and middle-income countries
- An estimated 46% of adults with hypertension are unaware that they have the condition.
- Less than half of adults (42%) with hypertension are diagnosed and treated.
- Approximately 1 in 5 adults (21%) with hypertension have it under control.
- Hypertension is a major cause of premature death worldwide.
- One of the global targets for non-communicable diseases is to reduce the prevalence of hypertension by 33% between 2010 and 2030.
What is Hypertension?
Hypertension (high blood pressure) is when the pressure in your blood vessels is too high (130/90 mmHg or higher). It is common but can be serious if not treated.
People with high blood pressure may not feel symptoms. The only way to know is to get your blood pressure checked.
Things that increase the risk of having high blood pressure include:
- older age
- genetics
- being overweight or obese
- not being physically active
- high-salt diet
- drinking too much alcohol
Lifestyle changes like eating a healthier diet, quitting tobacco, and being more active can help lower blood pressure. Some people may still need to take medicines.
Blood pressure is written as two numbers. The first (systolic) number represents the pressure in blood vessels when the heart contracts or beats. The second (diastolic) number represents the pressure in the vessels when the heart rests between beats.
Hypertension is diagnosed if, when it is measured on two different days, the systolic blood pressure readings on both days are ≥140 mmHg and/or the diastolic blood pressure readings on both days is ≥90 mmHg.
The American College of Cardiology and the American Heart Association divide blood pressure into four general categories. Ideal blood pressure is categorized as normal.)
- Normal blood pressure. Blood pressure is 120/80 mm Hg or lower.
- Elevated blood pressure. The top number ranges from 120 to 129 mm Hg and the bottom number is below, not above, 80 mm Hg.
- Stage 1 hypertension. The top number ranges from 130 to 139 mm Hg and the bottom number is between 80 and 89 mm Hg.
- Stage 2 hypertension. The top number is 140 mm Hg or higher or the bottom number is 90 mm Hg or higher.
Blood pressure higher than 180/120 mm Hg is considered a hypertensive emergency or crisis. Seek emergency medical help for anyone with these blood pressure numbers.
Untreated, high blood pressure increases the risk of heart attack, stroke, and other serious health problems. It’s important to have your blood pressure checked at least every two years starting at age 18. Some people need more-frequent checks.
Healthy lifestyle habits, such as not smoking, exercising, and eating well, can help prevent and treat high blood pressure. Some people need medicine to treat high blood pressure.