LBBB


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Related to LBBB: Left bundle branch block

LBBB

left bundle branch block; see bundle branch block, under block.

LBBB

abbreviation for left bundle branch block.

LBBB

Left bundle-branch block

bundle branch block

,

BBB

A defect in the electrical conduction system of the heart in which there is failure of conduction down one of the main branches of the bundle of His. On the surface electrocardiogram, the QRS complex is > 0.12 sec. and its shape is altered. Synonym: bundle branch heart block; interventricularheart block

left bundle branch block

Abbreviation: LBBB
A defect in the conduction system of the heart in which electrical conduction down the left bundle branch is delayed. On the 12-lead EKG, it gives the QRS complex a widened QS complex in lead V1 (0.12 sec.).

right bundle branch block

Abbreviation: RBBB
A defect in the conductive system of the heart in which electrical conduction down the right bundle branch is delayed. On the 12-lead EKG, it gives the widened QRS complex an RSR appearance in leads V1 and V2.

left bundle branch block

Abbreviation: LBBB
A defect in the conduction system of the heart in which electrical conduction down the left bundle branch is delayed. On the 12-lead EKG, it gives the QRS complex a widened QS complex in lead V1 (0.12 sec.).
References in periodicals archive ?
Among 383 patients with unstable angina who were in the hospital, 56 patients suffering from LBBB were included in the present study.
LBBB criteria were based on recommendations of American Heart Association Electrocardiography and Arrhythmias Committee [9].
Hypercreatininemia and prerenal azotemia are predictors of death in patients with unstable angina and LBBB within 14 days of the onset of the disease.
Exercise tests can be misleading in patients with LBBB.
Assessment of a patient with LBBB can also be complicated if the block is rate related--if it only manifests when the patient's heart reaches a certain pumping rate.
Although a minor change of the T-wave in an anterior lead can be a normal variant, larger changes (4-5 mm) can flag silent myocardial ischemia or infarction, intermittent LBBB, or ventricular overload.
Hopefully, improved recognition of patterns of myocardial infarction in the presence of wide QRS complexes, especially LBBB, will result in more widespread and prompt use of reperfusion therapy (6).
The early deterioration of the left ventricular function related to left bundle-branch dyssynchrony and the occurrence of ventricular tachyarrhythmia poses the question whether a biventricular ICD should be the first choice management in MD1 with early onset heart failure and complete LBBB.
The ability of Cardio3KG to identify old LBBB will help reduce unnecessary invasive procedures and lower the overall cost of medical care.
The latest results show that Cardio3KG accurately identifies new LBBB, adding to the diagnostic power of this solution.
Conclusion: The MSCT coronary angiography can be utilized as a noninvasive diagnostic method for patients with LBBB, in order to evaluate coronary artery disease.
In the Framingham Study, 45% of patients with LBBB were reported to have coronary artery disease, and 10-year follow-up of these patients revealed mortality rates up to 50% (1).