Hypercholesterolemia (High Cholesterol): Symptoms, Causes & Treatment

Hypercholesterolemia, or high cholesterol, is a very common health condition characterized by elevated cholesterol levels in the blood, particularly low-density lipoprotein (LDL) cholesterol, known as 'bad cholesterol.' When cholesterol levels rise, fat molecules begin to accumulate on artery walls, forming plaques that narrow blood passages and reduce blood flow. This significantly increases the risk of heart attacks, strokes, and other cardiovascular diseases. Importantly, most people experience no symptoms in the early stages, making regular screening essential for early detection and prevention.

In Jordan and the Middle East, high cholesterol affects millions of people, especially with changing lifestyles and increased consumption of fatty foods combined with sedentary habits. Cholesterol comes in two main types: LDL (bad cholesterol) that deposits in arteries, and HDL (good cholesterol) that helps clean arteries. Triglycerides, another type of blood fat, also increase cardiovascular risk when elevated. High cholesterol can be effectively managed through a healthy diet, regular exercise, and medication compliance when prescribed.

Early detection through regular blood screening is crucial, especially for those with risk factors such as family history of heart disease, obesity, or diabetes. Appropriate treatment and careful monitoring significantly reduce the likelihood of serious complications.

Most people with high cholesterol experience no symptoms at all, especially in early stages. High cholesterol is called a "silent killer" because it can progress for years without obvious signs while gradually damaging arteries and the heart. Blood tests are the only way to detect it. However, when high cholesterol leads to complications, serious symptoms may appear.

• No symptoms in most cases: This is the most common scenario; a person may feel nothing despite elevated cholesterol.
• Chest pain (Angina): A person may feel chest pain or pressure, especially during exertion, if cholesterol narrows the coronary arteries.
• Shortness of breath: This may occur during exertion or exercise due to reduced blood flow to the heart.
• Fatigue and tiredness: Some patients feel extreme fatigue without obvious cause due to insufficient oxygen reaching the heart and tissues.
• Weakness and lethargy: A person may be unable to perform physical activities they previously could manage.
• Erectile dysfunction in men: May indicate damage to small blood vessels due to cholesterol deposits.
• Stroke symptoms: If a blood clot forms in the brain, sudden weakness, facial drooping, speech difficulty, or loss of consciousness may occur.
• Heart attack symptoms: Severe chest pain, pain in the left arm or shoulder, nausea, and a feeling of suffocation.

• Genetic factors: Some people inherit genes that cause their bodies to produce more cholesterol than normal or struggle to eliminate it efficiently, leading to high cholesterol regardless of diet.
• Unhealthy diet: Consuming large amounts of saturated fats (found in red meat, butter, and cheese) and trans fats (in processed and baked foods) directly raises bad (LDL) cholesterol levels.
• Lack of physical activity: Exercise helps increase good cholesterol (HDL) and decreases bad cholesterol and triglycerides, so sedentary lifestyle worsens the condition.
• Obesity and excess weight: Extra weight is directly linked to elevated bad cholesterol and triglycerides, and reduced good cholesterol levels.
• Smoking: Smoking decreases good cholesterol (HDL) and increases the damage caused by bad cholesterol to blood vessels.
• Chronic stress: Prolonged stress may raise cholesterol and triglyceride levels in the blood.
• Certain medical conditions: Conditions like diabetes, hypothyroidism, liver disease, and kidney disease can elevate blood cholesterol levels.
• Medication side effects: Certain medications such as contraceptives and hormone replacement therapy may increase cholesterol levels.

• Family history: Having a first-degree relative (parent, sibling) with heart disease or high cholesterol significantly increases your risk.
• Age: Risk increases with age; men over 45 and women over 55 or postmenopausal are at higher risk.
• Sex/Gender: Men generally face higher cholesterol risk at a younger age compared to premenopausal women.
• Diabetes and prediabetes: Diabetic patients are more prone to elevated cholesterol and triglycerides.
• High blood pressure: People with hypertension have increased risk of high cholesterol and heart disease.
• Chronic liver and kidney disease: Can affect cholesterol metabolism and elevate levels.
• Hypothyroidism: Associated with elevated cholesterol levels.
• Metabolic syndrome: A combination of obesity, high blood pressure, elevated blood sugar, and abnormal lipids significantly increases risk.
• Ethnicity and genetic background: Certain populations have higher genetic predisposition to high cholesterol.
• Sedentary lifestyle and excessive alcohol consumption: Both increase triglycerides and bad cholesterol levels.

Diagnosis of high cholesterol is primarily based on a blood test called a Lipid Panel or Lipid Profile, which measures cholesterol and triglyceride levels. There are no visible clinical signs detectable on general physical examination, making laboratory testing essential for early detection. Screening is recommended every 4-6 years for healthy adults, and more frequently for those with risk factors.

• Lipid Panel test: Measures four values: total cholesterol, bad cholesterol (LDL), good cholesterol (HDL), and triglycerides. A blood sample is taken from a vein after 9-12 hours of fasting for accurate results.
• Reference normal values: Total cholesterol: less than 200 mg/dL (desirable); LDL: less than 100 mg/dL; HDL: more than 40 mg/dL for men and 50 mg/dL for women; triglycerides: less than 150 mg/dL.
• LDL (Low-Density Lipoprotein) test: Usually calculated from the full test and is the most important indicator of cardiovascular risk. The lower the value, the better.
• Triglycerides test: Elevated values increase cardiovascular risk, especially when HDL is low.
• Carotid ultrasound: May be used to assess the thickness of carotid artery walls and evaluate the degree of hardening, particularly for high-risk patients.
• Electrocardiography (ECG) and stress test: May be ordered for patients with symptoms or very high-risk factors to check for cardiac damage.
• CT coronary angiography: May be used in suspected cases to evaluate the degree of blockage in coronary arteries.

Medications

• Statins: First-line treatment that reduces LDL cholesterol production in the liver, lowering it by 30-50%. Examples include Atorvastatin, Simvastatin, and Rosuvastatin. Usually taken once daily, often in the evening, with doses adjusted as needed.
• PCSK9 Inhibitors: Modern, highly effective medications for patients who don't respond adequately to statins or have severe hereditary high cholesterol. They lower LDL by 50-70%. Administered by subcutaneous injection every two weeks or monthly (e.g., Evolocumab).
• Ezetimibe (Cholesterol Absorption Inhibitors): Reduce cholesterol absorption from food in the intestines. Can be used alone or with statins, lowering LDL by 15-20%.
• CETP Inhibitors: Relatively newer medications that increase HDL and reduce LDL and triglycerides, though less commonly used than other options.
• Bile Acid Sequestrants: Older medications that reduce cholesterol absorption in the intestines. Less commonly used now due to known gastrointestinal side effects.
• MTP Inhibitors: Primarily used for very high triglyceride levels.

Procedures

• Angioplasty and Stent Placement: Used when there is severe blockage in a specific artery causing symptoms. A balloon opens the blocked artery, and a stent keeps it open. This treats complications, not cholesterol itself.
• Coronary Artery Bypass Surgery: May be used for severe and multiple blockages where stents are insufficient.
• Carotid Endarterectomy: A surgical procedure to remove plaques from carotid arteries in the neck if blockages are very severe.

Lifestyle Changes

• Healthy diet: Follow Mediterranean or DASH diet. Reduce saturated and trans fats, increase fiber from vegetables, fruits, and whole grains. Eat fatty fish (salmon, mackerel) rich in omega-3 twice weekly. Choose low-fat milk and skinless chicken.
• Regular exercise: At least 150 minutes of moderate activity weekly (brisk walking, swimming). Physical activity raises HDL, reduces weight and triglycerides.
• Weight loss: Losing 5-10% of excess weight can noticeably improve cholesterol levels.
• Quit smoking: Smoking significantly reduces good cholesterol (HDL) and increases damage. Quitting improves the condition quickly.
• Limit alcohol: Excessive alcohol raises triglycerides significantly. If you drink, consume moderately (one drink daily for women, two for men).
• Stress management: Practice relaxation techniques like yoga, meditation, or deep breathing.
• Sleep quality: Aim for 7-9 hours of sleep daily, as poor sleep increases inflammation and cholesterol.
• Medication adherence: If prescribed medications, take them regularly as directed even if you feel well. Many people stop medications early because they feel no symptoms.

• Heart Attack (Myocardial Infarction): Occurs when cholesterol completely or partially blocks heart arteries, preventing blood flow to heart muscle, causing muscle death. This is a very dangerous emergency that can be fatal if not treated immediately.
• Stroke: Happens when a brain artery is blocked by cholesterol or a blood clot, cutting oxygen to brain tissue and causing nerve cell death. May leave permanent effects like paralysis or speech difficulty.
• Stable Angina: Chest pain or pressure during exertion due to reduced blood flow to the heart. May develop into dangerous unstable angina.
• Heart Failure: Over time, the heart weakens due to cholesterol damage and cannot pump blood efficiently. Causes fluid buildup in lungs and limbs, shortness of breath, and severe fatigue.
• Peripheral Artery Disease: Narrowing of arteries in limbs (legs and arms), causing pain and weakness during walking that may progress to serious complications.
• Erectile Dysfunction: Cholesterol damages small blood vessels responsible for erection, causing sexual problems in men.
• Kidney Disease: High cholesterol may affect blood vessels in the kidneys and cause kidney function problems.
• Aortic Aneurysm: In rare cases, cholesterol and inflammation may weaken large blood vessel walls, causing dangerous expansion that could rupture.

• Follow a healthy, balanced diet: Focus on vegetables, fruits, whole grains, and legumes. Reduce saturated fats (red meat, butter) and trans fats (baked goods, fast food). Choose healthy fats like olive oil, fish oil, and nuts.
• Exercise regularly: At least 30 minutes of moderate activity most days per week. This raises good cholesterol (HDL) and lowers bad cholesterol (LDL).
• Maintain a healthy weight: Obesity is directly linked to high cholesterol. If overweight, aim to lose 5-10% of your weight gradually.
• Don't smoke and avoid secondhand smoke: Smoking significantly reduces good cholesterol and increases bad cholesterol damage. Quitting now is the best decision you can make.
• Limit alcohol consumption: If you drink, consume in moderation only. Excessive alcohol raises triglycerides significantly.
• Manage stress: Chronic stress increases cholesterol and inflammation. Practice yoga, meditation, and enjoyable hobbies.
• Ensure good sleep quality: Sleep 7-9 hours daily. Poor sleep increases inflammation and cholesterol.
• Get regular cholesterol screening: If you have risk factors, test every 1-2 years. Without risk factors, test every 4-6 years after age 20.
• Treat other chronic conditions: Diabetes and high blood pressure may increase cholesterol. Manage them well.
• Check your family's genetics: If you have a strong family history, consult your doctor about genetic testing and you may need medication at a younger age.