How does a bundle branch block happen?

It may occur with natural degeneration of the hearts conduction system that occurs with age. It can also occur in people who have another underlying heart or lung problem. It may also be caused as a result of a heart procedure. A block of the right bundle branch may cause an electrocardiogram to be distorted.

Is left bundle branch block life threatening?

In older people with coronary artery disease, left bundle branch block is associated with greater risk of death. This is especially true for people with heart failure. Left bundle branch block is also linked to a greater risk of death after a heart attack.

Can dehydration cause right bundle branch block?

RBBB can be chronic and lifelong; it can also be intermittent. In some people it is related to heart rate. It is possible to have a low blood pressure caused by dehydration. This can lead to a fast heart beat and RBBB.

Which is worse left or right bundle branch block?

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.

Why are bundle branch blocks bad?

In people with known or suspected heart disease, right bundle branch block is associated with a greater risk of death, especially after a heart attack. Some people with right bundle branch block may ultimately need a permanent pacemaker, but this is rare.

How is a bundle branch block diagnosed?

Electrocardiogram (ECG or EKG). An ECG records the electrical impulses in your heart using wires attached to the skin on your chest and sometimes your limbs. This test can show signs of a bundle branch block, as well as which side is being affected.

What is life expectancy with LBBB?

The mortality rates were 4.5\%/year for patients with LBBB, 2.5\%/year for patients with RBBB, and 1.9\%/year for patients without BBB (P < 0.001). Among patients with a normal SE, those with LBBB had similar mortality to those without LBBB (HR = 0.9; 95\% CI: 0.4-2.2; P = 0.8).