How is LAFB diagnosed on ECG?

How is LAFB diagnosed on ECG?

The criteria to diagnose a LAFB, or LAHB, on ECG include the following:

  1. Left axis deviation of at least -45 degrees.
  2. The presence of a qR complex in lead I and a rS complex in lead III.
  3. Usually a rS complex in lead II and III (sometimes aVF as well)

Why does LAFB cause left axis deviation?

It is caused by only the anterior half of the left bundle branch being defective. It is manifested on the ECG by left axis deviation….

Left anterior fascicular block
Specialty Cardiology

How is left anterior fascicular block diagnosis?

Isolated (pure) LAFB is diagnosed by finding a mean QRS axis of −45° or more and a QRS width of less than 0.12 sec.

Is LAFB benign?

Left anterior fascicular block (LAFB) is considered a benign electrocardiographic (ECG) finding,1 but its long-term consequences have not been comprehensively studied.

Is LAFB serious?

The condition, called “left anterior fascicular block” (LAFB), involves scarring in a section of the hearts’ left ventricle (pumping chamber). People with the condition may be at higher risk of heart failure, sudden cardiac death or a dangerous heart rhythm disorder called atrial fibrillation, the new study found.

What is the significance of left anterior fascicular block?

Left anterior fascicular block (LAFB) is considered a failure or delay of conduction in the left anterior fascicle. Despite the fact that little is known about the long-term prognosis associated with LAFB, it has generally been thought of as a benign electrocardiographic (ECG) finding.

What are the symptoms of left axis deviation?

Left axis deviation symptoms depend on the underlying cause. For example, if left ventricular hypertrophy is the cause of LAD, symptoms can include shortness of breath, fatigue, chest pain (especially with exercise), palpitations, dizziness, or fainting.