Key points about bifascicular block
- Bifascicular block is a heart conduction disorder where two of the three fascicles are blocked.
- It often occurs due to heart disease or structural damage to the conduction system.
- Symptoms may be mild or absent, but it can lead to dizziness, fainting or arrhythmias.
- Diagnosis is typically made with an ECG, showing specific abnormalities.
- Treatment can involve monitoring, medications or, in some cases, a pacemaker.
Common related conditions
Bifascicular block causes
Bifascicular block may be caused by:
- Coronary artery disease or previous heart attacks, which can damage the conduction system.
- High blood pressure, leading to changes in the heart’s structure.
- Degenerative conduction system diseases, such as idiopathic fibrosis.
- Electrolyte imbalances affecting the heart's electrical system.
- Prior heart surgery or trauma.
Bifascicular block risk factors
Several factors increase the risk of developing bifascicular block, including:- Coronary artery disease or history of heart attack.
- Hypertension (high blood pressure).
- Age, as the risk of degeneration in the conduction system increases with age.
- Family history of heart disease or conduction problems.
- Chronic conditions like diabetes or obesity.
Bifascicular block symptoms
Symptoms of bifascicular block can include:- Dizziness, especially with physical activity or exertion.
- Fatigue or general weakness.
- Episodes of fainting or nearly fainting.
- Heart palpitations or an irregular heartbeat in some cases.
Bifascicular block diagnosis
To diagnose bifascicular block, doctors use:- An electrocardiogram (ECG or EKG) to identify abnormal conduction patterns.
- An echocardiogram to assess the heart’s function and structure.
- Additional tests to rule out underlying heart conditions, such as coronary artery disease or heart failure.
Bifascicular block treatment
Treatment options for bifascicular block include:- Regular monitoring for those with mild or asymptomatic cases.
- Medications to treat underlying conditions like high blood pressure or heart disease.
- In more severe cases, a pacemaker may be implanted to maintain a normal heart rate and prevent complications.
When to Seek Care
You should seek medical care if you experience:
- Symptoms like dizziness, fainting, or palpitations.
- A history of heart disease or if you have risk factors for heart disease.
- Difficulty exercising or shortness of breath, which could indicate worsening heart function.
- Any irregular heartbeat or significant change in your usual heart rhythm.