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Cardiovascular Disease: Causes, Symptoms and Treatment

Cardiovascular diseases affect the heart and blood vessels and are the leading cause of death worldwide. Many cases can be prevented through a healthy lifestyle.

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Things worth knowing about "Cardiovascular Disease"

Cardiovascular diseases affect the heart and blood vessels and are the leading cause of death worldwide. Many cases can be prevented through a healthy lifestyle.

What Are Cardiovascular Diseases?

Cardiovascular diseases (CVD) are a group of disorders affecting the heart and blood vessels. They include coronary artery disease, heart attack (myocardial infarction), stroke, heart failure, and peripheral artery disease. According to the World Health Organization, cardiovascular diseases are responsible for approximately 17.9 million deaths each year, making them the leading cause of mortality worldwide.

Causes and Risk Factors

Cardiovascular diseases typically develop from a combination of genetic predisposition and lifestyle factors. The most important risk factors include:

High blood pressure (hypertension)
Elevated blood cholesterol levels (hypercholesterolaemia)
Smoking
Diabetes mellitus
Overweight and obesity
Physical inactivity
Unhealthy diet
Chronic stress
Family history and genetic factors

A key underlying mechanism in many cardiovascular diseases is atherosclerosis -- a gradual hardening and narrowing of the arteries caused by the buildup of fatty deposits called plaques, which restrict blood flow.

Symptoms

Symptoms vary depending on the specific condition but may include:

Chest pain or pressure (angina pectoris)
Shortness of breath, especially during physical activity
Irregular or rapid heartbeat (arrhythmia)
Dizziness or fainting
Swelling in the legs or ankles (oedema, common in heart failure)
Sudden weakness, speech difficulties, or vision loss (warning signs of stroke)

Many cardiovascular diseases progress silently for years without noticeable symptoms. Regular medical check-ups are therefore essential for early detection.

Diagnosis

Several diagnostic methods are available to evaluate cardiovascular health:

ECG (electrocardiogram): records the electrical activity of the heart
Echocardiography: ultrasound imaging of the heart
Blood tests: measuring cholesterol, blood glucose, and inflammatory markers
Blood pressure measurement
Coronary angiography: imaging of the coronary arteries using contrast dye
CT and MRI scans of the heart or blood vessels

Treatment

Medications

Treatment depends on the specific condition and may include:

Antihypertensives (e.g., ACE inhibitors, beta-blockers, calcium channel blockers) to lower blood pressure
Statins to reduce cholesterol levels
Blood thinners (anticoagulants and antiplatelet agents) to prevent clot formation
Diuretics to reduce fluid retention in heart failure

Interventional and Surgical Procedures

Coronary artery bypass surgery: rerouting blood flow around blocked arteries
Stent implantation: widening narrowed arteries using a small mesh tube
Pacemaker or defibrillator implantation for heart rhythm disorders
Heart transplantation in severe cases of heart failure

Lifestyle Changes

Alongside medical treatment, lifestyle modifications are crucial for both management and prevention:

Regular physical activity
A heart-healthy diet (e.g., Mediterranean diet)
Quitting smoking
Stress management
Weight loss in cases of overweight or obesity

Prevention

A large proportion of cardiovascular diseases can be prevented or significantly delayed through a healthy lifestyle. Managing known risk factors, attending regular health screenings, and adopting heart-healthy habits are the most effective preventive measures available.

References

World Health Organization (WHO): Cardiovascular diseases (CVDs). Fact Sheet, 2023. https://www.who.int/news-room/fact-sheets/detail/cardiovascular-diseases-(cvds)
Roth GA et al.: Global Burden of Cardiovascular Diseases and Risk Factors, 1990-2019. Journal of the American College of Cardiology, 2020;76(25):2982-3021.
Arnett DK et al.: 2019 ACC/AHA Guideline on the Primary Prevention of Cardiovascular Disease. Circulation, 2019;140(11):e596-e646.

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