Hemiblock: Difference between revisions
| (2 intermediate revisions by the same user not shown) | |||
| Line 6: | Line 6: | ||
Hemiblocks are defined as impaired conduction in the [[electrical system of the heart]] that occurs below the [[AV node]] within the fascicles of the [[left bundle branch]]. | Hemiblocks are defined as impaired conduction in the [[electrical system of the heart]] that occurs below the [[AV node]] within the fascicles of the [[left bundle branch]]. | ||
==Classification | ==Classification== | ||
===Left | ===Left Anterior Hemiblock=== | ||
[[Left anterior hemiblock]] is caused by interruption of the anterior division of the [[left bundle branch]]. This fascicle is fragile, easily exposed to damage, and has a single blood supply (the [[left anterior descending coronary artery]]). | [[Left anterior hemiblock]] is caused by interruption of the anterior division of the [[left bundle branch]]. This fascicle is fragile, easily exposed to damage, and has a single blood supply (the [[left anterior descending coronary artery]]). | ||
===Left | |||
Left posterior fascicular block is characterized by a mean frontal plane axis of >90° in the absence of other causes of [[right axis deviation]]. Left posterior hemiblock (left posterior fascicular block) is infrequent.<ref>ABC of Clinical Electrocardiography, Morris F, Edhouse J, Brady WJ, Camm J, 2003</ref> Its seen either in the setting of either [[RCA]] or [[LAD]] related pathologies. | ===Left Posterior Hemiblock=== | ||
[[Left posterior fascicular block]] is characterized by a mean frontal plane axis of >90° in the absence of other causes of [[right axis deviation]]. Left posterior hemiblock (left posterior fascicular block) is infrequent.<ref>ABC of Clinical Electrocardiography, Morris F, Edhouse J, Brady WJ, Camm J, 2003</ref> Its seen either in the setting of either [[RCA]] or [[LAD]] related pathologies. | |||
==References== | ==References== | ||
{{Reflist|2}} | {{Reflist|2}} | ||
{{WH}} | |||
{{WS}} | |||
[[Category:Electrophysiology]] | |||
[[Category:Cardiology]] | |||
[[Category:Disease]] | |||
Latest revision as of 21:04, 7 February 2013
|
WikiDoc Resources for Hemiblock |
|
Articles |
|---|
|
Most recent articles on Hemiblock |
|
Media |
|
Evidence Based Medicine |
|
Clinical Trials |
|
Ongoing Trials on Hemiblock at Clinical Trials.gov Clinical Trials on Hemiblock at Google
|
|
Guidelines / Policies / Govt |
|
US National Guidelines Clearinghouse on Hemiblock
|
|
Books |
|
News |
|
Commentary |
|
Definitions |
|
Patient Resources / Community |
|
Patient resources on Hemiblock Discussion groups on Hemiblock Directions to Hospitals Treating Hemiblock Risk calculators and risk factors for Hemiblock
|
|
Healthcare Provider Resources |
|
Causes & Risk Factors for Hemiblock |
|
Continuing Medical Education (CME) |
|
International |
|
|
|
Business |
|
Experimental / Informatics |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
Hemiblocks are defined as impaired conduction in the electrical system of the heart that occurs below the AV node within the fascicles of the left bundle branch.
Classification
Left Anterior Hemiblock
Left anterior hemiblock is caused by interruption of the anterior division of the left bundle branch. This fascicle is fragile, easily exposed to damage, and has a single blood supply (the left anterior descending coronary artery).
Left Posterior Hemiblock
Left posterior fascicular block is characterized by a mean frontal plane axis of >90° in the absence of other causes of right axis deviation. Left posterior hemiblock (left posterior fascicular block) is infrequent.[1] Its seen either in the setting of either RCA or LAD related pathologies.
References
- ↑ ABC of Clinical Electrocardiography, Morris F, Edhouse J, Brady WJ, Camm J, 2003