High Blood Pressure (Hypertension)

About High Blood Pressure (Hypertension)

High blood pressure, also known as hypertension, is a condition where the force of blood against the artery walls is consistently too high. Blood pressure is measured in millimeters of mercury (mmHg) and is recorded as two numbers:
- Systolic pressure (top number): measures pressure during heartbeats
- Diastolic pressure (bottom number): measures pressure between heartbeats

Normal blood pressure is less than 120/80 mmHg. Hypertension is diagnosed when blood pressure is consistently 130/80 mmHg or higher.

Hypertension is often called the "silent killer" because it typically has no symptoms but can lead to serious health problems like heart disease, stroke, and kidney failure.

Symptoms

Most people with high blood pressure have no symptoms, even when readings are dangerously high. However, some people may experience:
• Severe headaches
• Shortness of breath
• Nosebleeds
• Flushing
• Dizziness
• Chest pain
• Visual changes
• Blood in the urine
• Fatigue
• Irregular heartbeat

These symptoms typically occur only when blood pressure reaches dangerously high levels and require immediate medical attention.

Causes

The causes of high blood pressure include:

Primary (Essential) Hypertension:
• No identifiable cause
• Develops gradually over many years
• Genetic factors
• Age-related changes
• Lifestyle factors

Secondary Hypertension:
• Kidney disease
• Adrenal gland tumors
• Thyroid problems
• Sleep apnea
• Certain medications (birth control pills, decongestants)
• Illegal drugs (cocaine, amphetamines)
• Pregnancy (preeclampsia)
• Congenital heart defects

Risk Factors

Risk factors for high blood pressure include:

Modifiable Risk Factors:
• Overweight or obesity
• Physical inactivity
• High-sodium (salt) diet
• Low-potassium diet
• Excessive alcohol consumption
• Smoking
• Stress
• Sleep apnea
• High cholesterol

Non-Modifiable Risk Factors:
• Age (risk increases with age)
• Family history
• Gender (men are at higher risk until age 64)
• Race (higher prevalence in certain ethnicities)
• Genetics

Complications of uncontrolled hypertension:
• Heart attack
• Stroke
• Kidney damage
• Vision loss
• Heart failure
• Aneurysm

Diagnosis

Blood pressure is measured using a sphygmomanometer (blood pressure cuff). Diagnosis is based on multiple readings taken on different days:

Blood Pressure Categories (American Heart Association):
• Normal: Less than 120/80 mmHg
• Elevated: 120-129/less than 80 mmHg
• Stage 1 Hypertension: 130-139/80-89 mmHg
• Stage 2 Hypertension: 140/90 mmHg or higher
• Hypertensive Crisis: Higher than 180/120 mmHg (emergency)

Additional tests may include:
• Urine tests
• Blood tests (cholesterol, potassium, kidney function)
• Electrocardiogram (ECG)
• Echocardiogram
• Ambulatory blood pressure monitoring (24-hour monitoring)

Regular blood pressure monitoring at home is recommended for accurate diagnosis and management.

Treatment

Treatment for high blood pressure aims to reduce blood pressure to a safe level:

Lifestyle Modifications:
• Weight loss (if overweight or obese)
• DASH Diet (Dietary Approaches to Stop Hypertension)
• Reducing sodium intake
• Regular physical activity (at least 150 minutes/week)
• Limiting alcohol
• Quitting smoking
• Managing stress
• Getting adequate sleep

Medications:
• Diuretics (water pills)
• ACE inhibitors
• Angiotensin II receptor blockers (ARBs)
• Calcium channel blockers
• Beta-blockers
• Alpha-blockers
• Renin inhibitors
• Combination medications

Emergency Treatment:
• For hypertensive crisis (180/120 or higher), immediate hospitalization may be required
• IV medications
• Close monitoring

Treatment is typically lifelong and requires regular monitoring and adjustments.

Prevention

Prevention strategies for high blood pressure:

1. Healthy Diet:
• Eat a diet rich in fruits, vegetables, and whole grains
• Choose low-fat dairy products
• Limit sodium (salt) intake to less than 2,300 mg per day
• Increase potassium intake
• Limit saturated fats and cholesterol

2. Regular Physical Activity:
• At least 150 minutes of moderate exercise weekly
• Include aerobic activities like walking, jogging, or swimming
• Strength training twice a week

3. Healthy Weight:
• Maintain BMI between 18.5-24.9
• Even modest weight loss can significantly lower blood pressure

4. Limit Alcohol:
• Men: no more than 2 drinks per day
• Women: no more than 1 drink per day

5. Quit Smoking:
• Smoking raises blood pressure and damages blood vessels
• Seek support for smoking cessation

6. Manage Stress:
• Practice relaxation techniques
• Get adequate sleep
• Take breaks and maintain work-life balance

7. Regular Health Screenings:
• Check blood pressure regularly
• Monitor cholesterol and blood sugar levels

Complications

Uncontrolled high blood pressure can lead to serious complications:

• Heart Attack: Damage to heart muscle from reduced blood flow
• Stroke: Brain damage from blocked or burst blood vessels
• Heart Failure: Heart cannot pump enough blood
• Kidney Damage: Kidneys become damaged and may fail
• Vision Loss: Damage to blood vessels in the eyes
• Aneurysm: Weakening of blood vessel walls
• Metabolic Syndrome: Cluster of conditions increasing heart disease risk
• Vascular Dementia: Reduced blood flow to the brain
• Peripheral Artery Disease: Narrowing of blood vessels in the limbs
• Angina: Chest pain due to reduced blood flow to the heart

When to Consult

Consult a doctor if you experience:

• Blood pressure readings consistently above 130/80 mmHg
• Symptoms like severe headaches, shortness of breath, or visual changes
• Family history of high blood pressure or heart disease
• Elevated risk factors (obesity, smoking, sedentary lifestyle)
• Pregnancy-related hypertension
• Side effects from blood pressure medications

Emergency Care (Call 1122 or go to ER):
• Blood pressure of 180/120 mmHg or higher
• Chest pain or pressure
• Shortness of breath
• Severe headache with confusion
• Numbness or weakness on one side
• Difficulty speaking
• Vision changes

Regular monitoring and follow-up care are essential for managing hypertension effectively.

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