A left anterior fascicular block (LAFB) also known as a left anterior hemiblock (LAHB) occurs when the anterior fascicle of the left bundle branch is no longer able to conduct action potentials.

The interpretation I received stated that I had an abnormal ECG with a “left anterior fascicular block.” Needless to say, this alarmed me. I saw a nurse practitioner who stated: “Don’t be ...

The interpretation I received stated that I had an abnormal ECG with a “left anterior fascicular block.” Needless to say, this alarmed me. I saw a nurse practitioner who stated: “Don’t be ...

San Francisco, CA(updated) - Left anterior fascicular block (LAFB), an electrocardiographic abnormality previously considered benign, is associated with a significantly increased long-term risk of ...

The interpretation I received stated that I had an abnormal ECG with a "left anterior fascicular block." Needless to say, this alarmed me. I saw a nurse practitioner who stated: "Don't be ...

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?