Left bundle branch block often results from heart damage. Conditions that can cause LBBB include: Heart attack (myocardial infarction). Heart disease (coronary artery disease).

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 …

6 days ago · Learn what bundle branch block means, what causes it, and how it's diagnosed and managed—plus when symptoms like fainting or fatigue need urgent care.

Sep 3, 2025 · Left bundle branch block (LBBB) occurs when cardiac electrical impulses cannot follow a typical pathway to regulate heart rhythm. It can be a sign of underlying heart disease. …

Left bundle branch block (LBBB) results from anatomical or functional impairment of the left bundle branch (LBB), leading to a blockage of electrical impulse conduction through this …

Sometimes, though, left bundle branch block happens on its own even when the heart may be structurally normal. Researchers aren’t sure what causes these cases of left bundle branch …

Left bundle branch block (LBBB) is a conduction abnormality in the heart that can be seen on an electrocardiogram (ECG). [1] In this condition, activation of the left ventricle of the heart is …

Oct 5, 2024 · Left bundle branch block (LBBB) is an intraventricular conduction abnormality usually caused by ischemic or mechanical factors affecting the cardiac conduction system's …

Jun 19, 2025 · Impulses, or electrical signals, travel through both the left and right chambers of your heart to make it pump. But if the pathway is blocked, the impulses may move slower than …

Mar 1, 2024 · Left bundle branch block (LBBB) is an electrical issue in the heart. An electrical signal that begins in the right atrium triggers contractions in each heart chamber. From the …