About Bicuspid Aortic Valve
The root causes of bicuspid aortic valve (BAV) are still not fully understood, but several factors have been identified:
- Unusual blood flow in the ascending aorta caused by the abnormal structure and function of a BAV
- Genetic factors can cause an unusual structure in the middle layer of the aortic wall, called the aortic media. This layer is important for giving the aorta strength and flexibility.
- Patients with a BAV often have higher levels of certain tiny particles in their blood, called endothelial microparticles (EMPs), which help cells in the body communicate with each other.
- A congenital condition that happens when the flaps (cusps) of the aortic valve fuse together before birth
Non-modifiable risk factors for BAV cannot be changed or controlled. These include:
- Genetics: BAV is a congenital condition, meaning it is present from birth. It can run in families, so having a family history of BAV or other congenital heart conditions is a significant risk factor.
- Gender: BAV is more common in males than females.
Modifiable risk factors, factors that can be influenced or changed, for BAV are not well understood. However, some risk factors for aortic valve stenosis (a condition where the aortic valve becomes narrowed and restricts blood flow, and a common complication of BAV) may also apply for BAV patients. These include:
- Age
- Obesity
- High cholesterol
- High blood pressure (hypertension)
- Smoking habits
It's important to note that these modifiable risk factors are not specific to BAV but are shared with other cardiovascular diseases. Lifestyle modifications and appropriate medical management can help reduce these risk factors. Remember to consult with your healthcare professional for personalized advice.
The most common early symptoms of BAV may include:
- Chest pain
- Lightheadedness
- Difficulty exercising
- Shortness of breath during physical activity
- Fatigue
As BAV progresses to later stages or higher severity, additional symptoms may occur, including:
- Feeling tired during physical activity
- Fainting
- Heart palpitations or fluttering
- Swollen feet or ankles
- Difficulty sleeping or lying flat
- Increased fatigue
In some cases, BAV can also lead to complications such as:
- Aortic stenosis: Narrowing of the aortic valve, restricting blood flow
- Aortic regurgitation: Leakage of blood back into the heart
- Heart failure: Weakened heart unable to pump blood effectively
- Aortic aneurysm: Bulge in the aorta, increasing the risk of rupture
- Endocarditis: Infection of the heart
- Irregular heart rhythms (arrhythmias): Abnormal heartbeat patterns
It's important to note that symptoms can vary from person to person, and some individuals with BAV may not experience any symptoms until adulthood. If you are experiencing any concerning symptoms, it is recommended to consult with your healthcare professional for an accurate diagnosis and appropriate management.
To diagnose BAV, the following examinations, tests, and procedures are commonly performed:
- Medical history review: Your doctor will ask about your symptoms and medical history.
- Physical exam: This includes using a stethoscope to listen to your heart for any abnormal sounds, like murmurs, which can signal problems with the valve.
- Echocardiogram: This is the main test for diagnosing BAV. It uses sound waves to create moving images of your heart, showing how blood flows through the heart and detecting any valve or blood flow problems.
- Transthoracic echocardiogram (TTE): During this test, a device called a transducer is placed on the chest to make pictures of the heart using sound waves. These pictures let doctors see if the aortic valve has two flaps instead of the usual three and check how well the heart and valves are working. This helps them diagnose and understand the condition better.
- Electrocardiogram (ECG): This test measures the electrical activity of your heart to assess its function.
- Chest X-ray: This imaging study can provide additional information about the heart and lungs.
- Cardiac CT (computed tomography) or MRI (magnetic resonance imaging) scans: These imaging techniques may be used to obtain more detailed images of the heart and blood vessels.
To determine the severity or impact of BAV, additional examinations, tests, and procedures may include:
- Regular monitoring of aortic sinuses and ascending aorta: The aortic sinuses are small pockets near the start of the aorta, and the ascending aorta is the parts that goes upward from the heart. Doctors check the size and shape or these areas over time using imaging tests like echocardiography, cardiac CT, or MRI.
- Duplex ultrasound, computed tomography angiography (CTA), or magnetic resonance angiography (MRA): These tests can help find the location and severity of artery narrowing (stenosis) in patients with symptoms of peripheral artery disease.
- Aortic diameter evaluation: Measuring the width of the aorta is recommended in patients with BAV as needed, based on factors like how quickly the aorta is widening, the severity of the condition, and family history.
It's important to consult with your healthcare professional for personalized advice regarding these examinations, tests, and procedures.
The goals of treatment for BAV are to manage symptoms, prevent complications, and improve overall heart health. Treatment options include:
- Medications:
- Blood thinners: These medications help prevent blood clots from forming in the heart, especially for individuals with mechanical valves.
- Antibiotics: Some doctors may recommend antibiotics before dental procedures to reduce the risk of developing endocarditis in individuals at risk.
- Therapeutic procedures:
- Valve repair: In cases of aortic regurgitation, a surgeon reshapes the valve using a catheter to improve its function.
- Valve replacement: If symptoms are present or aortic stenosis has developed, the valve may need to be replaced with a tricuspid valve made from either mechanical or tissue material. This can be done through open-heart surgery or with a minimally invasive catheter procedure.
- Cardiac rehabilitation: Usually paired with valve repair or replacement surgery. It’s a 12-week program that combines diet, exercise, and lifestyle changes to support heart health after surgery.
- Health behavior changes:
- Heart-healthy lifestyle: Adopting a nutritious diet, engaging in regular physical activity, managing stress, and avoiding tobacco use can help improve heart health and reduce complications associated with BAV.
Each treatment approach aims to address specific aspects of BAV and contribute to achieving the treatment goals. It is essential to consult with your healthcare professional for personalized advice and guidance regarding medication types, therapies, procedures, and lifestyle changes.
Medication dosing may be affected by many factors. Check with your healthcare professional about dosing for your individual situation. Other side effects can occur. Check with your healthcare professional or read the information provided with your medication for additional side effect information.