The Incomplete Left Bundle Branch Block
Copyright policy )The Incomplete Left Bundle Branch Block
SUMMARY The incomplete left bundle branch block is an electrocardiographic entity, having well defined criteria, yet is a frequent cause of misinterpretation. The R>L septal depolarization results in loss of the normal left ventricular q wave, being replaced by an initial r wave. On occasion, the initial r wave component may be fused on the ascending limb of the predominant left ventricular R' wave, making identification of the ILBBB more difficult. The ILBBB electromotively differs in no way from the CLBBB, save for a QRS duration of 0.08 – 0.10 sec. Arteriosclerotic (coronary artery disease) and hypertensive heart disease (left ventricular and probable septal wall hypertrophy) are the two most common clinical and anatomic entities associated with the ILBBB.
- Larue Carter Hospital United States
- University of Wisconsin–Madison United States
Heart Block, Cardiac Conduction System Disease, Bundle-Branch Block, Humans
Heart Block, Cardiac Conduction System Disease, Bundle-Branch Block, Humans
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