About Familial Hypercholesterolemia
What is Familial Hypercholesterolemia
Causes and Risk Factors
Familial hypercholesterolemia (FH) is a genetic disorder characterized by significantly elevated levels of low-density lipoprotein cholesterol (LDL-C), leading to increased atherogenesis [ath-uh-roh-JEN-uh-sis] and early cardiovascular disease. FH is primarily caused by autosomal dominant mutations in three genes: LDL receptor (LDLR), apolipoprotein B (APOB), and proprotein convertase subtilisin/kexin type 9 (PCSK9). These mutations impair the clearance of LDL-C from the bloodstream, resulting in its accumulation.
Risk factors that cannot be controlled include:
- Genetic predisposition: Being born to parents who carry the FH gene mutation increases the risk of developing FH.
Since FH is a genetic condition, there are no risk factors that can be changed or influenced for the disease. However, there are certain factors that can make the condition worse or increase the risk of heart complications:
- Lifestyle factors: Unhealthy lifestyle choices, such as a diet high in saturated fats, lack of physical activity, smoking, and obesity, can worsen the risk profile for cardiovascular disease in individuals with FH.
- Metabolic and endocrine disorders: Conditions like diabetes and hypertension can increase the risk of cardiovascular disease in FH patients.
It's important to note that while lifestyle modifications can help manage cholesterol levels, medication is usually necessary for effective treatment. Consult with your healthcare professional for personalized advice.
Signs and Symptoms of FH
Familial hypercholesterolemia (FH) is a genetic disorder characterized by elevated levels of LDL cholesterol in the blood. The symptoms of FH can vary depending on the severity and progression of the condition. Common early signs and symptoms of FH include:
- Elevated LDL cholesterol levels
- Cholesterol deposits called xanthomas [zan-THO-muhz] (bumps around the knees, knuckles, or elbows)
Other common findings in later stages or complications of FH include:
- Aortic valve disease
- Cholesterol deposits around the inner edge of the cornea
It's important to note that not everyone with FH will experience all these symptoms, and some individuals may not have any symptoms at all. If you suspect you have FH or have concerns about your cholesterol levels, it's important to consult with your healthcare professional for proper diagnosis and management.
Diagnosing FH
To diagnose familial hypercholesterolemia (FH), the following examinations, tests, and procedures are commonly performed:
- Physical exam: A healthcare provider will conduct a physical exam to look for physical signs of a medical problem, such as pain, swelling, or the presence of masses near the tendons of the ankle and hands.
- Lab tests: Blood tests may be ordered to check lipid levels, including total cholesterol, LDL cholesterol, HDL cholesterol, and triglycerides. These tests help diagnose FH and assess its severity.
- Family history evaluation: A thorough evaluation of family history is essential as FH is an inherited condition. Identifying a family history of high cholesterol or premature heart disease can aid in diagnosing FH.
- Genetic testing: Genetic testing can identify specific gene mutations associated with FH. This test helps confirm the diagnosis and determine if FH is inherited.
It's important to consult with your healthcare provider who can recommend specific examinations, tests, and procedures based on your individual situation.
Treatment Options
The goals of treatment for familial hypercholesterolemia (FH) are to control lipid levels in the blood and prevent the development of atherosclerotic [ath-uh-roh-skluh-RAH-tik] cardiovascular disease. The following medications, therapies, health behavior changes, and other treatments are recommended to achieve these treatment goals:
Medications include:
- Statins: These drugs are the first-line therapy for FH and work by inhibiting an enzyme involved in cholesterol production, thereby lowering LDL cholesterol levels.
- Ezetimibe: This medication reduces the intestine’s ability to absorption cholesterol from food and can be used in combination with statins to further lower LDL cholesterol levels.
- Monoclonal Antibodies also known as PCSK9 inhibitors: These novel drugs inhibit enzymes or proteins involved in regulating LDL cholesterol levels.
Health behavior changes:
- Maintaining a healthy weight
- Exercising regularly
- Quitting smoking
- Limiting alcohol consumption
Other treatments:
- Emerging therapies: Several novel treatments are being studied for FH management, such as inhibitors of angiopoietin-like protein 3 (ANGPLT3). These therapies aim to further lower LDL cholesterol levels.
It's important to note that specific treatment plans may vary depending on the severity of FH and individual patient factors. Treatment of FH often requires more than one therapeutic approach. Consult with a healthcare professional for personalized recommendations. Medication dosing may be affected by many factors. Check with your health care professional about dosing for your individual situation. Other side effects can occur. Check with your health care professional or read the information provided with your medication for additional side effect information.