Left bundle branch block (LBBB) occurs when something blocks or disrupts the electrical impulse that causes your heart to beat. This block leads to an abnormal heart rhythm.

Oct 8, 2024 · Left bundle branch block (LBBB): 1) rS complex in V1 (tiny R wave, deep S wave) 2) Characteristic lateral lead morphology in V5-6 3) Note appropriate discordance in V1 with ST …

Jun 11, 2022 · Bundle branch block is a condition in which there's a delay or blockage along the pathway that electrical impulses travel to make the heart beat. It sometimes makes it harder for the heart to pump blood to the rest of the body.

Learn about left bundle branch block (LBBB), with emphasis on ECG criteria, differential diagnoses, causes, management and diagnosis of ischemia/infarction.

Oct 5, 2024 · Left bundle branch block (LBBB) is a cardiac conduction disorder that affects the left bundle branch of the heart's conduction system, leading to delayed or abnormal electrical impulses through the ventricles.

Aug 2, 2023 · A left bundle branch block (LBBB) is an abnormal pattern seen on an electrocardiogram (ECG). If LBBB is identified, cardiac electrical impulses are not following a normal distribution pattern across the ventricles.

In patients with significant LV dysfunction, LBBB results in left ventricular dyssynchrony and may contribute to heart failure (HF). The anatomy, clinical manifestations, differential diagnosis, prognostic implications, and treatment of LBBB will be reviewed here.

Electrocardiogram showing left bundle branch block and irregular rhythm due to supraventricular extrasystoles. A left bundle branch block LBBB is diagnosed on a 12-lead ECG. In adults, it is seen as wide QRS complexes lasting ≥120ms with characteristic QRS shapes in the precordial leads, although narrower complexes are seen in children. [4]

What is left bundle branch block? Left bundle branch block is a problem with the heart’s electrical wiring (conduction) system. Your heart has 4 chambers. The 2 upper chambers are called atria, and the 2 lower chambers are called ventricles.

The ECG strip below shows normal sinus rhythm, then atrial fibrillation with a rapid ventricular response develops. With the faster heart rate, the QRS complex morphology changes to that of a...