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 ...

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.

A left bundle branch block is a type of disruption of the heart's electrical impulses that can signal an underlying heart condition. ... (ECG) can detect it. Heart disease is one possible cause.

Dear Dr. Roach: I am a 66-year-old woman who recently had an ECG prior to my knee surgery. The interpretation I received stated that I had an abnormal ECG with a “left anterior fascicular block ...

In summary, atypical Wenckebach-type second-degree in the left bundle branch is the more plausible electrophysiological mechanism involved in the EKG findings observed in Figure 1.

Dear Dr. Roach: I am a 66-year-old woman who recently had an ECG prior to my knee surgery. The interpretation I received stated that I had an abnormal ECG with a “left anterior fascicular block ...

CORRECTING and REPLACING Heart Rhythm Case Reports Publishes Notable Case Detailing First Use of AI-Guided ECG Mapping for Left Bundle Branch Area Pacing Provided by Business Wire Apr 3, 2025 1:09am ...