Left Bundle Branch Block If your cardiologist spots LBBB on an EKG, they may run tests to figure out the cause. Unlike RBBB, left bundle blocks are more often a sign of tissue damage.

Left bundle branch block is a condition in which there's slowing along the electrical pathway to your heart's left ventricle.

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 ...

Because every other QRS complex has a left bundle branch block morphology, this is termed 2:1 left bundle branch block. It may be intermittent or rate related.

Those who have left bundle branch block can also experience symptoms such as pre faint condition in which people feel like fainting but they actually don’t.

However, unlike in the presence of a left bundle branch block, myocardial ischemia and infarction can easily be detected on ECG when a RBBB is present.

Left bundle branch block (LBBB) may indicate an underlying heart condition, such as a thickened heart from high blood pressure, coronary artery disease, or some other heart problem.

But a left bundle branch block may signal high-blood pressure, thickening or stretching of the heart wall, coronary artery disease or simply advancing age.

Did you know that certain medications can cause symptom of 'Left Bundle Branch Block'. Find these drugs listed on the page and be warned of similar symptoms as possible side-effects.

Q. Please explain a bundle-branch block on the left side of my heart. Cause? Cure? Complications? After viewing my EKG, my anesthesiologist referred to the condition as a heart abnormality and sugg… ...

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A left bundle branch block is a type of disruption of the heart's electrical impulses that can signal an underlying heart condition. Learn more here.