ECG characteristics of a typical LBBB showing wide QRS complexes with abnormal morphology in leads V1 and V6.
Specialty
Cardiology, Emergency Medicine
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 delayed, which causes the left ventricle to contract later than the right ventricle.
^"Conduction Blocks". Department of Physiology. Kansas City University of Medicine & Biosciences. Archived from the original on 23 May 2009. Retrieved 20 January 2009.
and 27 Related for: Left bundle branch block information
A bundlebranchblock is a partial or complete interruption in the flow of electrical impulses in either of the bundlebranches of the heart's electrical...
right bundlebranchblock (RBBB) is a heart block in the right bundlebranch of the electrical conduction system. During a right bundlebranchblock, the...
distinguished from, left bundle branchblock (LBBB). It is caused by only the left anterior fascicle – one half of the leftbundlebranch being defective. It is...
physiologic change. Conduction defects such as leftbundlebranchblock or left anterior fascicular block can cause LAD on the ECG. Pre-excitation syndrome...
Bifascicular block is characterized by right bundlebranchblock with left anterior fascicular block, leftbundlebranchblock, or right bundlebranchblock with...
one in the right bundlebranch, and two in the leftbundlebranch the left anterior fascicle and the left posterior fascicle. A block at any of these levels...
from the bundle of His to the Purkinje fibers. There are two branches of the bundle of His: the leftbundlebranch and the right bundlebranch, both of...
arrhythmias, left atrial enlargement, and sometimes intraventricular conduction defects and low voltage. When leftbundle-branchblock (LBBB) is accompanied...
changes indicating acute heart damage include: ST elevation, new leftbundlebranchblock and ST depression amongst others. The absence of ECG changes does...
Hypokalemia Right or left ventricular hypertrophy Intraventricular conduction abnormalities (e.g., right or leftbundlebranchblock, WPW, etc.) Hypothermia...
left ventricles. This is especially problematic in people with leftbundlebranchblock (blockage of one of the two primary conducting fiber bundles that...
infarction, but it may also be caused by leftbundlebranchblock, Wolff–Parkinson–White syndrome, right and left ventricular hypertrophy, or a faulty ECG...
Third-degree AV block or complete AV block Right bundle Incomplete right bundlebranchblock (IRBBB) Complete right bundlebranchblock (RBBB) Leftbundle Incomplete...
heart. The bundle of His branches into the left and the right bundlebranches, which run along the interventricular septum. The leftbundlebranch further...
years old, in the absence of a right bundlebranchblock (RBBB) Ventricular tachycardia with a leftbundlebranchblock (LBBB) morphology, with superior axis...
The key indication for CRT is leftbundlebranchblock (LBBB) of the heart, a cardiac abnormality leading to delayed left ventricular contraction. LBBB...
supraventricular tachycardias with aberrant conduction from a pre-existing bundlebranchblock are commonly misdiagnosed as ventricular tachycardia. Other rarer...
mimics of acute myocardial infarction, which include left ventricular hypertrophy, leftbundlebranchblock, paced rhythm, early repolarization, pericarditis...
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