Hypertension
Hypertension
Hypertension, commonly known as high blood pressure occurs when the force of the blood against the artery walls is consistently too high.
Over time, this increased pressure can cause significant damage to the cardiovascular system, increasing the risk of heart attack, stroke, kidney disease, and other serious health issues. Hypertension often develops over many years and typically exists without noticeable symptoms, making it a silent but dangerous condition.
High blood pressure is one of the leading risk factors for cardiovascular disease, contributing to about half of all heart attacks and strokes worldwide. In Australia, around 34% of adults have high blood pressure or are on medication for it (Australian Institute of Health and Welfare,2024). Despite its prevalence, many people remain unaware they have hypertension, as it typically presents no symptoms. However, with proper management, including lifestyle changes and medical treatment, it is possible to control blood pressure and reduce the risk of complications.
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Things you want to know
Hypertension is often referred to as the “silent killer” because most people do not experience any noticeable symptoms until the condition has progressed or complications arise. In cases where symptoms do occur, they may include:
- Severe headaches
- Shortness of breath
- Nosebleeds
- Chest pain
- Dizziness
- Vision changes.
However, these symptoms often indicate dangerously high blood pressure, and immediate medical attention is required.
Several factors can contribute to the development of hypertension, including:
- Genetics: A family history of hypertension increases the risk.
- Age: Blood pressure tends to rise as people get older.
- Lifestyle factors: Poor diet, excessive alcohol consumption, lack of physical activity, smoking, and high salt intake.
- Chronic conditions: kidney disease, diabetes, and obesity are often linked to high blood pressure.
- Stress: Prolonged stress may also play a role in raising blood pressure.
- Secondary hypertension: hypertension caused by another medical condition, such as the heart, kidney or endocrine system.
Hypertension is typically diagnosed through a simple blood pressure measurement taken using a cuff around the arm. However, several tests may be recommended to assess any damage to the heart or organs:
- Ambulatory blood pressure monitoring (ABPM): A wearable device for 24 hours to measure blood pressure periodically throughout the day and night, which most accurately reflects daily blood pressure and associated cardiovascular risks. A comprehensive report is provided by a hypertension specialist.
- Electrocardiogram (ECG): To detect any abnormalities in heart function.
- Echocardiogram: An ultrasound of the heart to assess its structure and function.
- Blood and urine tests: To check for underlying conditions such as kidney disease or diabetes.
If left untreated, hypertension can lead to severe complications, including:
- Heart disease: Such as heart attacks and heart failure.
- Stroke: Due to the damage caused to blood vessels in the brain.
- Kidney disease: High blood pressure can damage the kidneys, leading to renal failure.
- Vision loss: Damage to the blood vessels in the eyes can result in vision problems or blindness.
- Aneurysms: Weakened blood vessels may bulge and rupture.
Effective management of hypertension typically involves a combination of lifestyle changes and medication. Treatment options may include:
- Lifestyle modifications: Adopting a heart-healthy diet (e.g., low in salt, rich in fruits and vegetables), engaging in regular physical activity, reducing alcohol intake, quitting smoking, and managing stress.
- Medications: Common medications for hypertension include ACE inhibitors, beta-blockers, calcium channel blockers, and diuretics. The choice of medication depends on the patient’s overall health, age, and other medical conditions.
Commonly Asked Questions
Hypertension cannot usually be cured, but can be managed effectively with lifestyle changes and medications. Early detection and consistent management help prevent complications.
For people diagnosed with hypertension, regular monitoring at home and periodic visits to the doctor are essential. If you are at risk or have a family history, it is advisable to check your blood pressure at least once a year.
While stress can temporarily raise blood pressure, chronic stress and unhealthy stress-related behaviours (e.g., overeating, smoking) can contribute to long-term hypertension.
Hypertension rates tend to increase with age and are more prevalent in populations with sedentary lifestyles, high salt diets, and those with a family history of the condition. In Australia, adults over 55 are more likely to experience high blood pressure.
In many cases, particularly in early-stage hypertension or pre-hypertension, lifestyle changes such as improving diet, exercising, and reducing alcohol intake can significantly lower blood pressure. However, some individuals will still require medication for optimal control.
