❤️ Arterial Hypertension: A Complete Guide to Causes, Symptoms, Diagnosis, and Prevention

Arterial hypertension is one of the most common chronic cardiovascular diseases, affecting more than 1.4 billion people worldwide. The insidious nature of this condition lies in the fact that it can develop unnoticed for years, gradually damaging the blood vessels, heart, kidneys, and other vital organs. This is why hypertension is often called the “silent killer.” Understanding the causes, mechanisms, and methods of preventing this disease is the first step toward protecting your health and longevity.

What Is Arterial Hypertension and How Does It Develop?

Blood pressure is the force exerted by blood against the walls of the blood vessels with each heartbeat. It is measured using two values: systolic (upper) pressure is recorded when the heart muscle contracts, while diastolic (lower) pressure is recorded when it relaxes. A blood pressure of around 120/80 mmHg is considered normal. When these values consistently exceed 140/90 mmHg, this is referred to as arterial hypertension.

The development of hypertension involves several processes. With age or under the influence of adverse factors, the walls of the arteries lose elasticity and become stiffer. The blood vessel lumen may narrow due to atherosclerotic plaques. As a result, the heart has to work harder to push blood through narrowed and stiffened vessels. Over time, this leads to thickening of the wall of the heart’s left ventricle, known as hypertrophy, which is itself a serious risk factor.

Types and Classification of Hypertension

Doctors distinguish between two main types of arterial hypertension. Primary (essential) hypertension accounts for approximately 90–95% of all cases. Its exact cause is unknown, but its development is associated with a combination of genetic factors, lifestyle, and age-related changes in the blood vessels. Secondary (symptomatic) hypertension occurs in 5–10% of cases and is caused by another condition, such as kidney disease, endocrine disorders, narrowing of the aorta, or the use of certain medications.

Depending on the degree of blood pressure elevation, hypertension is divided into three grades:

• Grade I (mild): systolic pressure of 140–159 and diastolic pressure of 90–99 mmHg.
• Grade II (moderate): systolic pressure of 160–179 and diastolic pressure of 100–109 mmHg.
• Grade III (severe): systolic pressure of 180 or higher and diastolic pressure of 110 or higher mmHg.

Isolated systolic hypertension is classified separately. In this condition, only the upper pressure is elevated (140 or higher), while the lower pressure remains normal (below 90). This type is especially common among older adults and is associated with age-related loss of elasticity in the large arteries.

Causes and Risk Factors

The development of primary hypertension is caused by a complex combination of factors. Genetic predisposition plays a significant role: if both parents had hypertension, their children’s risk of developing it reaches 50–70%. Age is another non-modifiable factor: the likelihood of hypertension increases substantially after age 45 in men and after age 55 in women.

Among modifiable risk factors, excessive consumption of table salt ranks first. Sodium causes the body to retain water, increasing the volume of circulating blood and the strain on blood vessels. The average modern person consumes 10–12 grams of salt per day, whereas the recommended amount is no more than 5 grams. Excess body weight places additional strain on the cardiovascular system: every extra kilogram increases blood pressure by 1–2 mmHg.

A sedentary lifestyle weakens the heart muscle and impairs vascular tone. Chronic stress causes persistent activation of the sympathetic nervous system and the release of adrenaline, which constricts blood vessels and raises blood pressure. Smoking damages the inner lining of blood vessels and promotes the formation of atherosclerotic plaques and arterial spasms. Excessive alcohol consumption disrupts the regulation of vascular tone. Insufficient potassium, magnesium, and calcium in the diet may also contribute to elevated blood pressure.

Symptoms at Different Stages of the Disease

In its early stage, hypertension is most often asymptomatic. A person may live with elevated blood pressure for years without realizing there is a problem. This is why it is so important to measure blood pressure regularly, even when you feel well. The first symptoms usually appear once the disease has already progressed.

Early signs include intermittent headaches, most often in the back of the head, especially in the morning. Dizziness, noise or ringing in the ears, and a throbbing sensation in the temples may occur. Increased fatigue, irritability, and sleep disturbances are also common. Some patients report seeing “floaters” or dark spots before their eyes.

As the disease progresses, the symptoms become more pronounced: shortness of breath during physical exertion, rapid heartbeat, pain in the heart area, swelling of the legs in the evening, and impaired memory and concentration. During a hypertensive crisis—a sudden rise in blood pressure to critical levels—severe headache, nausea, vomiting, visual disturbances, chest pain, and a feeling of fear may occur. This condition requires immediate medical attention.

Target Organs: What Hypertension Damages

Prolonged elevation of blood pressure causes serious damage to so-called target organs. The heart is forced to work under increased strain, which causes thickening of the walls of the left ventricle (hypertrophy). Over time, the heart muscle becomes “fatigued,” and its ability to pump blood declines, leading to heart failure. The risk of myocardial infarction and cardiac arrhythmias also increases.

The brain is extremely sensitive to impaired blood supply. Hypertension is a leading cause of both ischemic strokes (blockage of a blood vessel) and hemorrhagic strokes (rupture of a blood vessel with bleeding into the brain). Chronically elevated blood pressure leads to a gradual deterioration of cerebral circulation and a decline in cognitive function, memory, and learning ability—a condition known as vascular encephalopathy.

The kidneys filter blood through tiny blood vessels called glomeruli. High blood pressure damages these vessels, impairing their filtering function. Hypertensive nephropathy develops and, if left untreated, may lead to chronic kidney failure. The eyes are affected by damage to the retinal blood vessels, known as hypertensive retinopathy. This may cause reduced visual acuity and even loss of vision. Large blood vessels undergo accelerated atherosclerosis, increasing the risk of an aortic aneurysm.

Diagnostic Methods

Regular blood pressure measurement is the basis of diagnosis. To obtain reliable results, certain rules must be followed: do not smoke, drink coffee, or exercise for 30 minutes before taking a measurement. Blood pressure should be measured in a calm state while seated with the back supported and the arm positioned at heart level. A diagnosis of hypertension is made when persistently elevated blood pressure is documented during several visits to a doctor.

Twenty-four-hour ambulatory blood pressure monitoring makes it possible to assess blood pressure fluctuations throughout the day and night and detect nocturnal hypertension or “white coat hypertension” (elevated blood pressure only in the presence of a doctor). Laboratory tests include complete blood count and blood chemistry, measurement of glucose, cholesterol, creatinine, and uric acid levels, as well as urinalysis. Instrumental methods—including ECG, echocardiography (ultrasound of the heart), ultrasound of the kidneys and adrenal glands, and examination of the ocular fundus—help assess the condition of target organs and rule out secondary causes of hypertension.

Lifestyle Changes as the Basis of Prevention

Lifestyle modification is a fundamental component of both the prevention and treatment of hypertension. Even when medication is prescribed, long-term blood pressure control cannot be achieved without changing one’s habits.

Diet. A diet rich in vegetables, fruits, whole grains, low-fat dairy products, fish, and nuts is recommended. Salt intake should be limited to 5 grams per day (about one teaspoon), and the consumption of saturated fats and sugar should be reduced. Potassium-rich foods such as bananas, dried apricots, potatoes, and spinach help remove excess sodium from the body.

Physical activity. Regular aerobic exercise—brisk walking, swimming, cycling, or dancing—for at least 150 minutes per week (30 minutes five times a week) can reduce blood pressure by 5–8 mmHg. It is important to begin with moderate activity and gradually increase its intensity. Heavy strength exercises involving breath-holding are contraindicated in people with hypertension.

Weight management. Every kilogram of body weight lost reduces blood pressure by approximately 1 mmHg. Reducing waist circumference is especially important: abdominal obesity (fat accumulation in the abdominal area) is closely associated with elevated blood pressure and metabolic disorders.

Giving up harmful habits. Quitting smoking improves vascular health within the first few weeks. Alcohol should be limited to minimal amounts: no more than one standard drink per day for women and two for men. Completely avoiding alcohol is even more preferable.

Stress management. Chronic stress is one of the leading triggers of hypertension. Relaxation techniques such as deep breathing, meditation, walks outdoors, and engaging in hobbies are beneficial. Establishing a regular sleep schedule is important: sleep at least 7–8 hours a night and go to bed and wake up at the same time each day.

When to See a Doctor

You should consult a general practitioner or cardiologist if your blood pressure remains consistently above 140/90 mmHg. Do not wait for symptoms to appear, as hypertension can remain hidden for a long time. Regular blood pressure measurement is recommended for everyone over the age of 35–40 and at an earlier age if risk factors are present. Emergency medical attention is required during a hypertensive crisis: blood pressure above 180/120 mmHg, severe headache, visual disturbances, chest pain, shortness of breath, numbness of the limbs, or speech impairment.

Complications of Untreated Hypertension

Without timely treatment and lifestyle changes, hypertension leads to serious consequences. Myocardial infarction and stroke are the most dangerous and common complications. Chronic heart failure causes shortness of breath, swelling, and an inability to tolerate even minimal physical exertion. Chronic kidney failure may require dialysis or a kidney transplant. An aortic aneurysm—an enlargement of the wall of the body’s largest blood vessel—may rupture and cause massive bleeding. Impaired blood supply to the lower limbs leads to intermittent claudication and trophic ulcers. According to research, controlling blood pressure can reduce the risk of stroke by 35–40%, myocardial infarction by 20–25%, and heart failure by more than 50%.

Common Myths About Hypertension

There are many misconceptions surrounding this condition. “If my blood pressure is high but I feel fine, I do not need treatment” is a dangerous myth. The absence of symptoms does not mean the absence of harm: the blood vessels and organs continue to suffer. “Hypertension is a disease of old age” is incorrect: in recent decades, the disease has become significantly more common among younger people and is often diagnosed in those aged 30–40. “If my blood pressure has returned to normal, I can stop taking my pills” is absolutely false: discontinuing medication without consulting a doctor can cause a sudden spike in blood pressure and a hypertensive crisis. “Coffee causes hypertension” is another misconception: moderate coffee consumption (2–3 cups per day) does not increase the risk of hypertension in healthy people, although those already diagnosed with the condition are advised to consult a doctor.

Arterial hypertension is a serious but manageable condition. Regular blood pressure monitoring, a healthy lifestyle, and, when necessary, properly selected medication make it possible to control the disease effectively and prevent its dangerous complications. Caring for vascular health is an investment in a long and active life.