What is a bundle branch block on an ECG?

What is a bundle branch block on an ECG?

A bundle branch block is either a complete or a partial interruption of the electrical pathways inside the wall of the heart between the two lower chambers (ventricles).

How can you tell the difference between stemi and LBBB?

In LBBB, V1-V3 always have a predominant S-wave (QRS is predominantly negative) and therefore ST depression (STD) in V1-V3 is always concordant; ≥ 1 mm of STD in just one of these leads is diagnostic of STEMI (posterior STEMI, in fact).

Is left bundle branch block a heart condition?

A left bundle branch block usually is a sign of an underlying heart disease, including dilated cardiomyopathy, hypertrophic cardiomyopathy, high blood pressure, aortic valve disease, coronary artery disease and other heart conditions.

What are the criteria for left bundle branch block?

The ECG criteria for a left bundle branch block include: QRS duration greater than 120 milliseconds Absence of Q wave in leads I, V5 and V6 Monomorphic R wave in I, V5 and V6 ST and T wave displacement opposite to the major deflection of the QRS complex

What is left bundle branch?

Left bundle branch block (LBBB) is a disorder which affects the heart. Normally, the electrical signals which cause cardiac muscle to contract pass through specialized heart tissue called the Bundle of His before dividing into right and left branches.

Is left bundle branch serious?

Left bundle branch block is considered more serious than right bundle branch block, and there’s also a greater likelihood that someone with left bundle branch block will experience symptoms. However, people with left bundle branch block may exhibit few to no symptoms.

Is a bundle branch block a serious condition?

In some cases, the presence of bundle branch block is a sign of serious underlying heart disease , and occasionally the bundle branch block itself causes problems. But in many other cases, bundle branch block is essentially a nonsignificant finding.