Is a left bundle branch block a serious condition?

Is a left bundle branch block a serious condition?

A block in the right bundle branch can occur in people who otherwise seem normal. If it happens with a heart attack, it can be a sign of serious heart muscle damage. A block in the left bundle branch is usually a sign of heart disease.

What is first degree block in ECG?

First-degree atrioventricular (AV) block is a condition of abnormally slow conduction through the AV node. It is defined by ECG changes that include a PR interval of greater than 0.20 without disruption of atrial to ventricular conduction. This condition is generally asymptomatic and discovered only on routine ECG.

Is 1st degree AV block serious?

First-degree heart block. This is the least severe. The electrical signals slow down as they move from your atria to your ventricles. But they continue to reach the ventricles without interruption. You generally don’t need any treatment for first-degree heart block.

What causes a 1st degree AV block?

Causes. The most common causes of first-degree heart block are AV nodal disease, enhanced vagal tone (for example in athletes), myocarditis, acute myocardial infarction (especially acute inferior MI), electrolyte disturbances and medication.

Is left bundle branch block worse than right?

This prospective study demonstrated that men with left bundle branch block showed both a much higher risk for developing high degree atrioventricular block and a markedly higher hazard ratio for all-cause mortality than individuals with right bundle branch block.

What is the treatment for 1st degree AV block?

In general, no treatment is required for first-degree AV block unless prolongation of the PR interval is extreme (>400 ms) or rapidly evolving, in which case pacing is indicated. Prophylactic antiarrhythmic drug therapy is best avoided in patients with marked first-degree AV block.

Can 1st degree heart block get worse?

What are the complications of first-degree heart block? In rare instances, a first-degree heart block may develop into a more serious type of heart block that results in slower heartbeats. This may cause symptoms.