Bundle branch blocks are abnormalities of the heart’s conduction system that show up an electrocardiogram (ECG), which is a tracing of the electrical activity in the heart.

DEAR DR. ROACH: I am a 63-year-old male who, during a routine EKG, showed a left bundle branch block. Can you tell me anything about this diagnosis, what it means, any treatment, future concerns ...

When a left bundle branch block appears on an ECG, the next step is usually an echocardiogram. This noninvasive imaging test shows whether the heart structure looks normal.

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… ...

We see this all the time: A routine ECG shows a left anterior fascicular block (also known as LAFB or left anterior hemiblock). Who cares? Does this mean anything, and is it any cause for concern?

Q-I`m a 27-year-old female in good health. However a recent EKG turned up a ”bundle branch blockage.” The doctor says it is an interruption in the heart`s electromagnetic field. What el… ...

A few years ago I had an EKG and was told I had a left bundle branch block. The heart doctor told me that in all other respects my heart was working fine and it was not a major problem.

No new left bundle branch block occurred after hospital discharge. In multivariate analysis, predictors of persistent left bundle branch block were greater ventricular depth of valve implantation and ...

Dear Dr. Roach: I am a 63-year-old male who, during a routine EKG, showed a left bundle branch block.Can you tell me anything about this diagnosis, what it means, any treatment, future concerns, etc ...

Dear Dr. K: I recently had an ECG that showed that I have a “left bundle branch block.” What does this mean? Dear Reader: When your heart beats, it does so in response to electrical signals ...