Hypertension: Symptoms, Causes, Diagnosis & Treatment
Hypertension, also known as high blood pressure, is a common medical condition in which the force of blood pushing against the walls of the arteries is consistently too high.
When blood pressure increases, the heart has to work harder to pump blood throughout the body. Over time, this extra pressure can damage the arteries, heart, kidneys, and other organs.
Hypertension often develops without noticeable symptoms, which is why it is sometimes called a "silent killer." Regular blood pressure checks are important because early diagnosis and appropriate treatment can help reduce the risk of serious complications, including heart attacks and strokes.
What Is Hypertension?
Blood pressure is the force exerted by circulating blood against the walls of the arteries.
When arteries become narrow or less flexible, resistance to blood flow increases, which can cause blood pressure to rise.
Healthcare professionals measure blood pressure in millimeters of mercury (mmHg). A blood pressure reading consists of two numbers:
Systolic Blood Pressure: The top number, which measures the pressure in your arteries when your heart beats.
Diastolic Blood Pressure: The bottom number, which measures the pressure in your arteries between heartbeats.
The reference threshold used in this article defines hypertension as:
A systolic blood pressure of 140 mmHg or higher.
A diastolic blood pressure of 90 mmHg or higher.
Blood pressure does not remain the same throughout the day. It can change depending on physical activity, emotional stress, body position, medications, and age.
For example, blood pressure may increase during exercise or excitement and become lower when you are resting.
Types of Hypertension
Hypertension can be classified into several types depending on its cause and the pattern of blood pressure readings.
1. Primary Hypertension
Primary hypertension, also known as essential hypertension, develops gradually and does not have one identifiable underlying cause.
Factors such as genetics, family history, and aging may contribute to its development.
2. Secondary Hypertension
Secondary hypertension occurs when high blood pressure is caused by an identifiable medical condition, medication, or substance.
Possible contributing factors include kidney conditions, hormonal disorders, and certain medications.
3. White Coat Hypertension
White coat hypertension occurs when blood pressure readings are higher in a healthcare setting but normal when measured at home or in other everyday environments.
This may be associated with stress or anxiety during medical appointments.
4. Masked Hypertension
Masked hypertension occurs when blood pressure readings appear normal in a healthcare setting but are elevated when measured at home or during daily activities.
Home blood pressure monitoring or ambulatory monitoring may help identify this pattern.
Signs and Symptoms of Hypertension
Hypertension is often a silent condition because many people do not experience noticeable symptoms, even when their blood pressure is elevated.
The condition may develop over several years without obvious warning signs.
However, extremely high blood pressure can cause serious symptoms that require urgent medical assessment.
Possible warning signs include:
Changes in mental function or confusion.
Chest pain.
Dizziness.
Edema or swelling.
Heart palpitations.
Seizures.
Severe headache.
Vision changes, including sudden blurred vision or vision loss.
Stroke-like symptoms, such as sudden facial drooping, slurred speech, or weakness in an arm or leg.
Important: Chest pain, seizures, sudden vision loss, or symptoms of a stroke require immediate emergency medical attention. Do not wait for blood pressure to return to normal on its own.
What Causes High Blood Pressure?
Several factors may contribute to the development of hypertension.
Common causes and risk factors include:
Age: The risk of hypertension generally increases as people get older, particularly after age 55.
Family History: Having close family members with high blood pressure may increase your risk.
Smoking: Tobacco use damages blood vessels and contributes to cardiovascular problems.
Obesity: Excess body weight can increase the workload on the heart and contribute to high blood pressure.
Physical Inactivity: A sedentary lifestyle may increase the risk of hypertension.
High Sodium Intake: Consuming too much sodium can contribute to fluid retention and elevated blood pressure.
Excessive Alcohol Consumption: Drinking too much alcohol may increase blood pressure.
Underlying Medical Conditions: Certain conditions, including obstructive sleep apnea, renal artery stenosis, primary aldosteronism, and thyroid disorders, may contribute to hypertension.
Not everyone with these risk factors develops high blood pressure, but managing them can help reduce cardiovascular risk.
Complications of Hypertension
Untreated or poorly controlled hypertension can gradually damage the heart, blood vessels, kidneys, brain, and eyes.
Possible complications include:
Stroke: High blood pressure can damage blood vessels in the brain and increase the risk of a stroke.
Heart Attack: Long-term pressure can damage arteries and increase the risk of coronary artery disease and heart attacks.
Heart Failure: The heart may become enlarged or weakened after working against increased pressure for a long time.
Arrhythmia: Hypertension may contribute to changes in the heart's structure and electrical activity.
Coronary Artery Disease: Damage to the arteries supplying blood to the heart may reduce blood flow.
Chronic Kidney Disease: High blood pressure can damage the small blood vessels in the kidneys.
Hypertensive Retinopathy: High blood pressure can damage the blood vessels in the retina.
Sexual Dysfunction: Hypertension and related blood vessel damage may contribute to sexual health problems.
Cognitive Impairment and Dementia: Long-term vascular damage may affect brain function and increase the risk of cognitive problems.
Early diagnosis and consistent blood pressure management can help reduce the risk of these complications.
Diagnosis and Tests
Healthcare professionals commonly measure blood pressure during routine medical appointments and annual check-ups.
A diagnosis of hypertension is generally based on repeated elevated readings rather than a single measurement.
The reference approach described here involves:
Taking blood pressure readings during at least two separate visits.
Obtaining at least two readings during each visit.
Evaluating the results and considering the patient's medical history and other risk factors.
If blood pressure remains elevated, a healthcare provider may recommend additional tests to assess cardiovascular health and investigate possible underlying causes.
Common tests include:
Blood Pressure Monitoring: Repeated measurements may help confirm whether blood pressure is consistently elevated.
Cholesterol Screening: Measures cholesterol levels and helps assess cardiovascular risk.
Electrocardiogram (ECG or EKG): Records the electrical activity of the heart.
Heart Ultrasound (Echocardiogram): Uses ultrasound to examine the structure and function of the heart.
Kidney Ultrasound: May be recommended when a kidney-related cause is suspected.
Home or ambulatory blood pressure monitoring may also help identify white coat or masked hypertension.
Management and Treatment of Hypertension
The main goals of hypertension treatment are to lower blood pressure, protect the heart and blood vessels, and reduce the risk of long-term complications.
Treatment may include lifestyle modifications, medications, or a combination of both.
Lifestyle Changes for High Blood Pressure
Healthy lifestyle habits can make an important difference in managing hypertension.
1. Maintain a Healthy Weight
Excess body fat, particularly around the abdomen, can contribute to increased blood pressure.
Fat tissue is metabolically active and releases substances that may affect blood pressure regulation and cardiovascular health.
For people who are overweight, gradual and sustainable weight loss may help improve blood pressure.
2. Follow a Healthy Diet
A nutritious eating pattern can support cardiovascular health and help control blood pressure.
Two commonly recommended eating patterns include:
DASH Diet: Dietary Approaches to Stop Hypertension, which emphasizes fruits, vegetables, whole grains, and low-fat dairy products while limiting sodium and saturated fat.
Mediterranean Diet: Focuses on vegetables, fruits, whole grains, legumes, nuts, fish, and healthy fats.
Reducing sodium intake and choosing minimally processed foods may also help control blood pressure.
3. Get Enough Potassium
Potassium helps balance sodium levels in the body and supports healthy blood pressure regulation.
Foods that contain potassium include:
Bananas.
Avocados.
Leafy green vegetables.
Potatoes.
People with kidney disease or those taking certain medications may need to monitor their potassium intake. Potassium supplements or salt substitutes should only be used when recommended by a healthcare professional.
4. Exercise Regularly
Regular physical activity can help lower blood pressure and improve cardiovascular health.
Aerobic activities encourage blood vessels to expand and contract, helping maintain their flexibility.
Examples include:
Walking.
Swimming.
Cycling.
Dancing.
Other moderate-intensity aerobic activities.
Aim for approximately 150 minutes of moderate aerobic activity each week, depending on your health and fitness level.
5. Quit Smoking
Smoking damages the lining of blood vessels and contributes to cardiovascular disease.
Quitting smoking can improve overall cardiovascular health and reduce the risk of heart and blood vessel complications.
6. Get Enough Quality Sleep
Good sleep supports overall health and helps regulate several processes involved in blood pressure control.
People who experience loud snoring, interrupted breathing during sleep, or excessive daytime sleepiness may need assessment for obstructive sleep apnea.
7. Limit Alcohol Consumption
Excessive alcohol consumption can increase blood pressure.
Limiting alcohol or avoiding it can be part of a healthy blood pressure management plan.
Medications for Hypertension
When lifestyle changes are not enough to control blood pressure, a healthcare provider may prescribe medication.
The choice depends on several factors, including blood pressure levels, age, kidney function, other medical conditions, and the patient's overall cardiovascular risk.
Different medication groups work in different ways.
Calcium Channel Blockers
Calcium channel blockers help relax and widen blood vessels by blocking calcium channels in their walls. This can reduce blood pressure and improve circulation.
Examples include:
Amlodipine.
Lercanidipine.
Examples of Brand Names:
Amlodipine 5 mg tablets.
Lercanidipine hydrochloride 10 mg.
Possible Side Effects:
Swelling of the ankles.
Headache.
Dizziness.
Flushing.
These medications are commonly prescribed once daily, according to the individual treatment plan.
Angiotensin Receptor Blockers (ARBs)
Angiotensin receptor blockers prevent angiotensin II from binding to its receptors. Angiotensin II normally causes blood vessels to narrow.
By blocking this effect, ARBs help blood vessels relax and lower blood pressure.
Examples include:
Candesartan.
Irbesartan.
Valsartan.
Losartan.
Telmisartan.
Examples of Brand Names:
Atacand.
Candesartan Calox.
Irbesartan.
Valsartan.
Losartan.
Telmisartan Sandoz.
Possible Side Effects:
Dizziness.
Low blood pressure.
These medications are commonly taken once daily when prescribed.
Angiotensin-Converting Enzyme (ACE) Inhibitors
ACE inhibitors reduce the activity of the angiotensin-converting enzyme, which plays a role in narrowing blood vessels.
This helps blood vessels relax and can lower blood pressure.
Examples include:
Enalapril.
Ramipril.
Lisinopril.
Captopril.
Perindopril.
Examples of Brand Names:
Renetic.
Enalapril.
Ramipril.
Lisinopril.
Captopril.
Ramilich.
Perindopril.
Possible Side Effects:
Dry cough.
Dizziness.
Beta Blockers
Beta blockers reduce the effects of stress-related hormones on beta-adrenergic receptors. This can lower heart rate and blood pressure and reduce the workload on the heart.
Examples include:
Atenolol.
Bisoprolol.
Nebivolol.
Propranolol.
Carvedilol.
Metoprolol.
Nebivolol may also increase the release of nitric oxide, which helps relax blood vessels.
Examples of Brand Names:
Atenolol 50 mg.
Bisoprolol 5 mg.
Metoprolol 50 mg.
Seloken ZOK.
Nebivolol 5 mg.
Beloc ZOK.
BisoHEXAL.
Carvedilol 25 mg.
Possible Side Effects:
Headache.
Dizziness.
Fatigue.
Slow heart rate.
Cold hands or feet.
Thiazide Diuretics
Thiazide diuretics help the kidneys remove sodium and water through urine.
This reduces the amount of fluid in the bloodstream and can help lower blood pressure.
Examples include:
Hydrochlorothiazide.
Chlortalidone.
Indapamide.
Examples of Brand Names:
Hydrochlorothiazide 25 mg.
Chlortalidone 12.5 mg.
Indapamide 2.5 mg.
Possible Side Effects:
Frequent urination.
Dizziness.
Low potassium levels.
Dehydration.
Potassium-Sparing Diuretics
Potassium-sparing diuretics help the body remove excess salt and water while conserving potassium.
An example is spironolactone.
Spironolactone blocks the effects of aldosterone, a hormone that encourages the body to retain salt and water.
Possible Side Effects:
Increased urination.
Dizziness.
Breast tenderness.
Loop Diuretics
Loop diuretics act on the kidneys by reducing the reabsorption of sodium and chloride in a part of the kidney called the loop of Henle.
This increases the excretion of water, salts, and electrolytes.
Examples include:
Furosemide.
Torsemide.
Examples of Brand Names:
Furosemide.
Torasemide.
Possible Side Effects:
Increased urination.
Dehydration.
Dizziness.
Low blood pressure.
Combination Blood Pressure Medications
Some medications contain two or more active ingredients to help control blood pressure through different mechanisms.
Examples include:
Atacand Plus: Combines candesartan with hydrochlorothiazide.
Co-Diovan: A combination medicine containing valsartan and hydrochlorothiazide.
Exforge: Combines amlodipine and valsartan.
Triplixam: Combines perindopril, amlodipine, and indapamide.
Combination medicines may simplify treatment for some patients, but they are not suitable for everyone.
Centrally Acting Antihypertensive Medications
Centrally acting antihypertensive medications work by reducing excessive nerve signals from the brain that can cause blood vessels to tighten and blood pressure to rise.
By reducing sympathetic nervous system activity, these medications can help blood vessels relax and lower blood pressure.
They may be prescribed for certain cases of essential or primary hypertension.
Possible Side Effects:
Slow heartbeat.
Low blood pressure.
Dizziness when standing.
Fainting.
Ringing in the ears.
Neck pain.
Swelling or edema.
Anxiety or nervousness.
Severe symptoms that require urgent medical attention may include:
Severe fainting.
Very slow heartbeat.
Severe low blood pressure.
Swelling of the face, lips, or throat.
Difficulty breathing.
Signs of a serious allergic reaction.
Important Information
DokterForYou does not sell medication.
The medications mentioned in this article are examples of treatments that healthcare professionals may consider depending on the patient's medical condition, blood pressure readings, symptoms, and medical history.
The choice of medication and dosage must be determined by a qualified healthcare professional.
Do not start, stop, or change blood pressure medication without medical advice.
Final Thoughts
High blood pressure often does not cause noticeable symptoms, even when it is gradually damaging the heart and blood vessels.
Regular blood pressure checks are important because early detection and appropriate treatment can help protect your cardiovascular health over time.
Lifestyle changes, including maintaining a healthy weight, following a balanced diet, exercising regularly, quitting smoking, and getting enough sleep, can support blood pressure control.
When necessary, medications prescribed by a healthcare professional can help lower blood pressure and reduce the risk of serious complications.
If you have elevated blood pressure or risk factors for hypertension, seek medical advice and follow a regular monitoring plan. Early diagnosis and consistent management can make a significant difference to your long-term health.
