What is hypertension and how is it classified?

Hypertension is a chronic medical condition where blood pressure in the arteries remains persistently elevated. It is a major global risk factor for cardiovascular diseases, stroke, and premature death. Most cases are classified as primary hypertension due to lifestyle and genetic factors, while a smaller portion is secondary hypertension caused by specific medical disorders.

What we know

• Hypertension is a long-term medical condition defined by persistently elevated blood pressure in the arteries. [1, 2]
• High blood pressure usually does not cause symptoms on its own but is a major risk factor for stroke, heart failure, and coronary artery disease. [2]
• About 90 to 95 percent of cases are primary hypertension, driven by non-specific lifestyle and genetic factors. [2]
• Secondary hypertension accounts for 5 to 10 percent of cases and stems from clearly identifiable causes like chronic kidney disease or endocrine disorders. [2]

Still open

• The exact effect of treating moderately elevated blood pressure between 130/80 and 160/100 mmHg remains somewhat unclear, with varying conclusions across medical reviews.

Where to go next

• what followedHow does coronary artery disease develop?
• how it workedWhat role do alpha-1 blockers play in treatment?
• what caused itHow does atherosclerosis narrow the arteries?
• how we knowHow is ambulatory blood pressure monitoring performed?
• the bigger pictureWhat are cardiovascular diseases?
• an unexpected connectionHow do genetic mutations from two million years ago relate to modern arterial disease?Sources suggest that atherosclerosis may have genetic roots tracing back to CMAH mutations in human ancestors over two million years ago.

Sources

• [1]arterial hypertension (Wikidata Q41861) · CC0 1.0
• [2]Hypertension · CC BY-SA 4.0
• [3]Alpha-1 blocker · CC BY-SA 4.0
• [4]Coronary artery disease · CC BY-SA 4.0
• [5]Atherosclerosis · CC BY-SA 4.0