Hypertension medical definition
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Hypertension Medical Definition and Blood Pressure Thresholds
Hypertension, also known as high blood pressure, is a chronic medical condition where the pressure in the arteries is consistently elevated. It is typically defined as having a systolic blood pressure (the top number) of 140 mmHg or higher, or a diastolic blood pressure (the bottom number) of 90 mmHg or higher, measured on multiple occasions while at rest Kaur2019Mirza2024Deepshikha2025. Some guidelines now consider hypertension as persistent systolic blood pressure of at least 130 mmHg or diastolic blood pressure of at least 80 mmHg . Blood pressure is measured using two numbers: systolic (when the heart contracts) and diastolic (when the heart relaxes between beats) .
Classification and Stages of Hypertension
Hypertension is classified into different stages based on blood pressure readings. The main categories are:
- Normal
- Prehypertension (or elevated blood pressure)
- Stage 1 Hypertension
- Stage 2 Hypertension
Some experts suggest that classification should also consider cardiovascular risk factors, early disease markers, and organ damage, not just blood pressure numbers Giles2009Giles2005. Hypertension can be further divided into primary (essential) hypertension, which has no identifiable cause, and secondary hypertension, which results from another medical condition .
Pathophysiology and Risk Factors
Hypertension develops due to a complex mix of genetic, environmental, and lifestyle factors. Key contributors include age, weight, diet (especially high salt intake), alcohol consumption, lack of physical activity, and other medical conditions Mirza2024Deepshikha2025. The underlying mechanisms involve changes in blood vessel function, increased activity of the sympathetic nervous system, and hormonal systems like the renin-angiotensin-aldosterone system .
Health Consequences of Hypertension
If left untreated, hypertension puts extra strain on the heart and blood vessels, leading to serious health problems such as heart disease, stroke, kidney disease, and damage to other organs Kaur2019Mirza2024Deepshikha2025+1 MORE. It is a leading cause of cardiovascular disease and a major public health challenge worldwide Deepshikha20258Carey2022.
Diagnosis and Management
Hypertension is diagnosed by measuring blood pressure with a sphygmomanometer. Early diagnosis through regular monitoring is important to prevent complications Mirza2024Deepshikha2025. Management includes lifestyle changes such as weight loss, healthy diet, reduced salt intake, regular exercise, and limiting alcohol. If lifestyle changes are not enough, medications like diuretics, ACE inhibitors, angiotensin receptor blockers, calcium channel blockers, and beta-blockers are used Mirza2024Deepshikha2025Carey2022.
Conclusion
Hypertension is a chronic condition defined by persistently high blood pressure, usually above 140/90 mmHg, though some guidelines use lower thresholds. It is a major risk factor for heart disease, stroke, and other serious health problems. Diagnosis relies on blood pressure measurements, and management focuses on lifestyle changes and, when necessary, medication. Early detection and effective treatment are crucial to reduce the risk of complications and improve long-term health outcomes Kaur2019Mirza2024Deepshikha2025+3 MORE.
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