High blood pressure (HBP) also is called hypertension (HI-per-TEN-shun).
When HBP has no known cause, it might be called essential hypertension, primary hypertension, or idiopathic (id-ee-o-PATH-ick) hypertension.
When another condition causes HBP, it's sometimes called secondary hypertension.
Some people only have high systolic blood pressure. This condition is called isolated systolic hypertension (ISH). Many older adults have this condition. ISH can cause as much harm as HBP in which both numbers are too high.
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