Left posterior fascicular block causes: Difference between revisions
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==Overview== | ==Overview== | ||
Isolated left posterior fascicular block is often an uncommon finding owing to the fact that the left posterior fascicle has a dual blood supply, and it is exposed to lower pressures and turbulence, hence, it is rarely damaged. It usually accompanies [[Right bundle branch block|right bundle branch block (RBBB)]] or in the setting of arteriosclerotic heart diseases such as [[myocardial infarction]]. Other less common causes include: [[infectious]] (e.g. [[Diphtheria natural history, complications and prognosis|diphteritic myocarditis]], [[The heart in Chagas' disease|Chagas disease]]); [[genetic]] (e.g. [[myotonic dystrophy]]). | Isolated left posterior fascicular block is often an uncommon finding<ref name="Godat-1993">{{Cite journal | last1 = Godat | first1 = FJ. | last2 = Gertsch | first2 = M. | title = Isolated left posterior fascicular block: a reliable marker for inferior myocardial infarction and associated severe coronary artery disease. | journal = Clin Cardiol | volume = 16 | issue = 3 | pages = 220-6 | month = Mar | year = 1993 | doi = | PMID = 8443995 }}</ref> owing to the fact that the left posterior fascicle has a dual blood supply, and it is exposed to lower pressures and turbulence, hence, it is rarely damaged. It usually accompanies [[Right bundle branch block|right bundle branch block (RBBB)]] or in the setting of arteriosclerotic heart diseases such as [[myocardial infarction]]. Other less common causes include: [[infectious]] (e.g. [[Diphtheria natural history, complications and prognosis|diphteritic myocarditis]], [[The heart in Chagas' disease|Chagas disease]]); [[genetic]] (e.g. [[myotonic dystrophy]]). | ||
==Causes== | ==Causes== | ||
Latest revision as of 20:27, 29 August 2013
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Left posterior fascicular block Microchapters |
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Differentiating Left posterior fascicular block from other Diseases |
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Left posterior fascicular block causes On the Web |
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Ayokunle Olubaniyi, M.B,B.S [2]
Overview
Isolated left posterior fascicular block is often an uncommon finding[1] owing to the fact that the left posterior fascicle has a dual blood supply, and it is exposed to lower pressures and turbulence, hence, it is rarely damaged. It usually accompanies right bundle branch block (RBBB) or in the setting of arteriosclerotic heart diseases such as myocardial infarction. Other less common causes include: infectious (e.g. diphteritic myocarditis, Chagas disease); genetic (e.g. myotonic dystrophy).
Causes
Life Threatening Causes
Life-threatening causes include conditions which may result in death or permanent disability within 24 hours if left untreated.
Common Causes
Causes by Organ System
| Cardiovascular | Cardiomyopathy, coronary artery disease, diphteritic myocarditis, hypertensive heart disease, myocardial infarction |
| Chemical/Poisoning | No underlying causes |
| Dental | No underlying causes |
| Dermatologic | No underlying causes |
| Drug Side Effect | No underlying causes |
| Ear Nose Throat | No underlying causes |
| Endocrine | No underlying causes |
| Environmental | No underlying causes |
| Gastroenterologic | No underlying causes |
| Genetic | Kearns-Sayre syndrome, limb-girdle muscular dystrophy, myotonic dystrophy |
| Hematologic | No underlying causes |
| Iatrogenic | No underlying causes |
| Infectious Disease | Chagas disease, diphteritic myocarditis |
| Musculoskeletal/Orthopedic | Limb-girdle muscular dystrophy, myotonic dystrophy |
| Neurologic | Kearns-Sayre syndrome |
| Nutritional/Metabolic | No underlying causes |
| Obstetric/Gynecologic | No underlying causes |
| Oncologic | No underlying causes |
| Ophthalmologic | No underlying causes |
| Overdose/Toxicity | No underlying causes |
| Psychiatric | No underlying causes |
| Pulmonary | Cor pulmonale |
| Renal/Electrolyte | Hyperkalemia |
| Rheumatology/Immunology/Allergy | No underlying causes |
| Sexual | No underlying causes |
| Trauma | No underlying causes |
| Urologic | No underlying causes |
| Miscellaneous | No underlying causes |
Causes in Alphabetical Order
- Cor pulmonale
- Cardiomyopathy
- Chagas disease
- Coronary artery disease
- Diphteritic myocarditis
- Hyperkalemia
- Hypertensive heart disease
- Kearns-Sayre syndrome
- Limb-girdle muscular dystrophy
- Myocardial infarction
- Myotonic dystrophy