Can bifascicular block cause syncope?

Introduction. Bifascicular block (BFB) is a conduction disturbance with reported prevalence of 1% to 1.5%, with up to 25% of adult patients presenting with syncope.

How serious is bifascicular block?

The main complication of bundle branch block, right or left, is to progress to a complete block of the electric conduction from the upper chambers of the heart to the lower. This can slow your heart rate, which can cause fainting and lead to serious complications and abnormal heart rhythms.

Which heart block causes syncope?

Syncope due to paroxysmal atrioventricular block (AVB) occurs because of a sudden change from apparently physiological atrioventricular conduction to transient second- or third-degree heart block, which leads to ventricular asystole.

Why does RBBB cause syncope?

RBBB doesn’t always cause symptoms. In fact, some people have it for years and don’t realize it until it shows up on an electrocardiogram (ECG or EKG). But in rare cases, a delay in the arrival of electrical impulses to the heart’s right ventricle can cause syncope.

What are the symptoms of bifascicular block?

When symptoms occur, most people experience unexplained fainting (syncope). A slow heart rate (bradycardia) or irregular heartbeat (arrhythmia) slows blood flow through your body, causing you to faint. Sometimes, a bifascicular block turns into a complete blockage that affects all bundle branches.

What is the treatment for bifascicular block?

Treatment. In those with bifascicular block and no symptoms, little with respect to treatment is needed. In those with syncope, a pacemaker is recommended.

Can you live with bifascicular block?

In patients with acute myocardial infarction, the incidence of complete AV block in patients with bifascicular block varied from 24 to 43 percent. The mortality in these patients is high, even in the absence of complete AV block, and varies from 36 to 59 percent.

What is the most common arrhythmia leading to syncope?

Syncope from arrhythmia most commonly results from ventricular tachycardia, which accounts for 11% of all cases of syncope.

What is Bifascicular block?

Bifascicular block – The term bifascicular block most commonly refers to conduction disturbances below the atrioventricular (AV) node in which the right bundle branch and one of the two fascicles (anterior or posterior) of the left bundle branch are involved.

Is bifascicular block considered heart disease?

Associated Conditions. Bifascicular block is often associated with structural heart disease and may be associated with progression to high-grade block or CHB.

What causes Bifascicular heart block?

A bifascicular block can occur as a part of the ischemic heart disease or as a part of the normal degeneration of the conduction system (Lev’s disease).