Cholesterol is often perceived as the “classic villain,” yet modern cardiology and international research (e.g., European Society of Cardiology guidelines) offer a more nuanced perspective. Understanding how cholesterol affects vascular health is the first step toward preventing cardiovascular diseases.
What is cholesterol?
Cholesterol is a waxy, fat-like substance (lipid) produced by the liver and obtained through diet. It is critical for building cell membranes, synthesizing Vitamin D, and producing hormones (estrogen, testosterone).
The role of cholesterol in the body:
- Cell membrane structure – ensures stability.
- Vitamin D synthesis – a raw material for skin-derived Vitamin D.
- Hormone production – essential for estrogen, testosterone, and cortisol.
- Digestion – the liver uses cholesterol to produce bile acids for fat metabolism.
Problems arise when there is an excess of low-density lipoproteins (LDL) or “bad” cholesterol in the bloodstream.
LDL vs. HDL: Understanding the difference
- LDL (Low-Density Lipoprotein): Transports cholesterol to cells. If present in excess, it deposits in artery walls, forming plaques (atherosclerosis).
- HDL (High-Density Lipoprotein): Acts as a “cleaner,” collecting excess cholesterol and returning it to the liver for processing.
What is a lipid panel?
To understand your risk profile, measuring total cholesterol is not enough. A lipid panel is required, analyzing:
- Total cholesterol – the sum of all fractions; informative but insufficient on its own.
- LDL (Bad cholesterol) – the main driver of atherosclerosis.
- HDL (Good cholesterol) – helps remove excess cholesterol.
- Triglycerides – fats used for energy; high levels are linked to metabolic syndrome.
| Patient Risk Group | LDL Target |
|---|---|
| Low risk (no other factors) | < 3.0 mmol/L |
| Moderate risk (e.g., smoking, mild hypertension) | < 2.6 mmol/L |
| High risk (significant hypertension, diabetes) | < 1.8 mmol/L |
| Very high risk (diagnosed atherosclerosis, previous heart attack) | < 1.4 mmol/L |
Why this is important: If plaque is detected during a vascular Doppler ultrasound, the patient is automatically classified as “High” or “Very high” risk, regardless of how well they feel. In such cases, even a cholesterol level of 2.5 mmol/L is considered too high.
Why “total cholesterol” is not enough
Experience shows that total cholesterol may appear “normal,” but if LDL is high and HDL is low, a patient is still in the high-risk zone for heart attack or stroke. A lipid panel also allows for the calculation of the atherogenic index—the ratio between “good” and “bad” cholesterol, which is a much more accurate predictive tool.
When does cholesterol become dangerous? The role of Doppler ultrasound
If a lipid panel shows elevated levels over time, there is a risk of atherosclerosis. This is when Doppler ultrasound (Duplex scanning) becomes vital. It is a non-invasive method used to visualize vessel walls and assess blood flow speed, helping to detect plaques (stenosis) before they cause a stroke or heart attack.
Vascular surgeon consultation: When should you act?
Many mistakenly believe that a vascular surgeon should only be visited when surgery is required. In reality, a consultation with a vascular surgeon is critical for prevention.
A specialist evaluates both your lipid panel data and Doppler ultrasound results to determine:
- Plaque stability: Are the changes in the vessel walls stable, or is there a risk that they could detach and cause thrombosis (blood clots)?
- Treatment strategy: Is dietary modification and statin therapy sufficient, or is a minimally invasive intervention required?
- Prognosis: How to prevent further blockage of blood vessels.
Dr. Roberts Rumba
Šeit ir teksta tulkojums angļu un krievu valodā, saglabājot medicīnisko precizitāti un SEO struktūru.
How to lower cholesterol?
If you want to improve your results, follow the recommendations of the American Heart Association (AHA):
- Reduce saturated fats – replace butter and fatty meats with olive oil and fish (Omega-3).
- Fiber intake – consume at least 25–30g of fiber daily (oats, legumes), which helps “flush” cholesterol from the digestive tract.
- Physical activity – 150 minutes of moderate-intensity cardio per week increases HDL (“good”) cholesterol levels.
Cholesterol management is not just about avoiding eggs. It is a complex approach that starts with a lipid panel, continues with a Doppler ultrasound to see the real condition of the blood vessels, and culminates in a professional vascular surgeon’s assessment.
FAQ
To ensure accurate test results, please follow these guidelines:
Fasting: Blood samples should be taken after a 9–12 hour fast. You may drink water, but avoid all food and other beverages.
Stability: Avoid alcohol consumption and excessive physical exertion for 24 hours prior to the test.
Consistency: If you are currently taking medication (such as statins), continue your regular dosage as prescribed. Taking the test while on medication allows your doctor to evaluate the effectiveness of your ongoing therapy.
To improve your cholesterol levels, follow these recommendations based on the American Heart Association (AHA) guidelines:
Reduce saturated fats: Replace butter and fatty meats with heart-healthy options like olive oil and fish (rich in Omega-3 fatty acids).
Increase fiber: Aim for at least 25–30g of fiber daily from sources like oats and legumes. Fiber acts like a sponge, helping to “flush” cholesterol out of your digestive tract before it enters your bloodstream.
Physical activity: Engage in 150 minutes of moderate-intensity cardio exercise per week. This helps raise HDL (“good”) cholesterol levels, which protects your arteries.
