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Dyslipidemia – Causes, Symptoms and Treatment

Dyslipidemia refers to abnormal levels of lipids in the blood, including high cholesterol or triglycerides. It is a major risk factor for cardiovascular disease and is often linked to lifestyle and genetic factors.

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Things worth knowing about "Dyslipidemia"

Dyslipidemia refers to abnormal levels of lipids in the blood, including high cholesterol or triglycerides. It is a major risk factor for cardiovascular disease and is often linked to lifestyle and genetic factors.

What is Dyslipidemia?

Dyslipidemia is a medical condition characterized by abnormal concentrations of lipids (fats) in the bloodstream. This includes elevated total cholesterol, elevated LDL cholesterol (often called bad cholesterol), reduced HDL cholesterol (good cholesterol), or elevated triglycerides. Dyslipidemia is a leading risk factor for atherosclerosis, heart attack, and stroke.

Causes

Dyslipidemia can be classified as primary or secondary:

Primary dyslipidemia: Caused by genetic factors, such as familial hypercholesterolemia
Secondary dyslipidemia: Caused by lifestyle factors or underlying conditions, including:
- Unhealthy diet high in saturated and trans fats
- Physical inactivity and obesity
- Type 2 diabetes mellitus
- Hypothyroidism (underactive thyroid)
- Chronic kidney disease
- Certain medications (e.g., corticosteroids, beta-blockers)
- Excessive alcohol consumption

Symptoms

Dyslipidemia typically causes no direct symptoms and is often discovered incidentally during routine blood tests. In severe or genetically driven cases, the following signs may appear:

Xanthomas: Fatty deposits beneath the skin, particularly around tendons and elbows
Xanthelasmas: Yellowish plaques on or around the eyelids
Corneal arcus: A whitish-grey ring around the cornea of the eye
Symptoms of complications such as chest pain from coronary artery disease

Diagnosis

Dyslipidemia is diagnosed through a blood lipid panel (lipid profile), which measures:

Total cholesterol
LDL cholesterol
HDL cholesterol
Triglycerides

Blood should ideally be drawn in a fasting state (after at least 12 hours without food). Additional tests may be performed to rule out underlying conditions such as diabetes, thyroid disorders, or kidney disease.

Treatment

Lifestyle Modifications

For mildly elevated lipid levels, lifestyle changes are recommended as the first step:

Dietary adjustments: reducing saturated fats and trans fats, increasing fiber, omega-3 fatty acids, and plant-based foods
Regular physical activity (at least 150 minutes of moderate exercise per week)
Weight loss in overweight individuals
Smoking cessation and reduction of alcohol intake

Pharmacological Treatment

When lifestyle changes are insufficient or cardiovascular risk is high, medications are prescribed:

Statins (e.g., atorvastatin, simvastatin): Inhibit the body's own cholesterol synthesis – the primary drug of choice
Ezetimibe: Reduces intestinal absorption of cholesterol
PCSK9 inhibitors: Monoclonal antibodies for significant LDL reduction, used in genetic forms or statin intolerance
Fibrates: Primarily used to lower elevated triglycerides
High-dose omega-3 fatty acids: Used as add-on therapy in hypertriglyceridemia

Prevention

A heart-healthy lifestyle is the most effective way to prevent dyslipidemia. This includes a balanced diet, regular physical activity, avoiding smoking, moderate alcohol intake, and regular health check-ups – especially for individuals with a family history of lipid disorders or cardiovascular disease.

References

European Atherosclerosis Society (EAS) / European Society of Cardiology (ESC): 2019 ESC/EAS Guidelines for the management of dyslipidaemias. European Heart Journal, 2019.
National Heart, Lung, and Blood Institute (NHLBI): High Blood Cholesterol – What You Need to Know. U.S. Department of Health and Human Services, 2022. Available at: https://www.nhlbi.nih.gov/health/blood-cholesterol
World Health Organization (WHO): Cardiovascular diseases (CVDs) – Key facts. WHO Fact Sheet, 2021. Available at: https://www.who.int/news-room/fact-sheets/detail/cardiovascular-diseases-(cvds)

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