Left posterior fascicular block causes: Difference between revisions

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Latest revision as of 20:27, 29 August 2013

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

References

↑ Godat, FJ.; Gertsch, M. (1993). "Isolated left posterior fascicular block: a reliable marker for inferior myocardial infarction and associated severe coronary artery disease". Clin Cardiol. 16 (3): 220–6. PMID 8443995. Unknown parameter |month= ignored (help)

Template:WikiDoc Sources

[Godat-1993-1] Godat, FJ.; Gertsch, M. (1993). "Isolated left posterior fascicular block: a reliable marker for inferior myocardial infarction and associated severe coronary artery disease". Clin Cardiol. 16 (3): 220–6. PMID 8443995. Unknown parameter |month= ignored (help)

[1]

@@ Line 1: / Line 1: @@
 __NOTOC__
+{{Left posterior fascicular block}}
+{{CMG}}; {{AE}} {{AO}}
-{{Left posterior fascicular block}}
+==Overview==
+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]]).
-{{CMG}}
+==Causes==
+===Life Threatening Causes===
+Life-threatening causes include conditions which may result in death or permanent disability within 24 hours if left untreated.
+*[[Hyperkalemia]]
+*[[Myocardial infarction]]
-== Overview ==
+===Common Causes===
+*[[Cardiomyopathy]]
+*[[Coronary artery disease]]
+*[[Hypertensive heart disease]]
+*[[Myocardial infarction]]
-== Causes ==
+===Causes by Organ System===
+{|style="width:80%; height:100px" border="1"
+|style="height:100px"; style="width:25%" border="1" bgcolor="LightSteelBlue" |'''Cardiovascular'''
+|style="height:100px"; style="width:75%" border="1" bgcolor="Beige" | [[Cardiomyopathy]], [[coronary artery disease]], [[Diphtheria natural history, complications and prognosis|diphteritic myocarditis]], [[hypertensive heart disease]], [[myocardial infarction]]
+|-
+|bgcolor="LightSteelBlue"| '''Chemical/Poisoning'''
+|bgcolor="Beige"| No underlying causes
+|-
+|-bgcolor="LightSteelBlue"
+| '''Dental'''
+|bgcolor="Beige"| No underlying causes
+|-
+|-bgcolor="LightSteelBlue"
+| '''Dermatologic'''
+|bgcolor="Beige"| No underlying causes
+|-
+|-bgcolor="LightSteelBlue"
+| '''Drug Side Effect'''
+|bgcolor="Beige"| No underlying causes
+|-
+|-bgcolor="LightSteelBlue"
+| '''Ear Nose Throat'''
+|bgcolor="Beige"| No underlying causes
+|-
+|-bgcolor="LightSteelBlue"
+| '''Endocrine'''
+|bgcolor="Beige"| No underlying causes
+|-
+|-bgcolor="LightSteelBlue"
+| '''Environmental'''
+|bgcolor="Beige"| No underlying causes
+|-
+|-bgcolor="LightSteelBlue"
+| '''Gastroenterologic'''
+|bgcolor="Beige"| No underlying causes
+|-
+|-bgcolor="LightSteelBlue"
+| '''Genetic'''
+|bgcolor="Beige"| [[Kearns-Sayre syndrome]], [[limb-girdle muscular dystrophy]],  [[myotonic dystrophy]]
+|-
+|-bgcolor="LightSteelBlue"
+| '''Hematologic'''
+|bgcolor="Beige"| No underlying causes
+|-
+|-bgcolor="LightSteelBlue"
+| '''Iatrogenic'''
+|bgcolor="Beige"| No underlying causes
+|-
+|-bgcolor="LightSteelBlue"
+| '''Infectious Disease'''
+|bgcolor="Beige"| [[The heart in Chagas' disease|Chagas disease]], [[Diphtheria natural history, complications and prognosis|diphteritic myocarditis]]
+|-
+|-bgcolor="LightSteelBlue"
+| '''Musculoskeletal/Orthopedic'''
+|bgcolor="Beige"| [[Limb-girdle muscular dystrophy]], [[myotonic dystrophy]]
+|-
+|-bgcolor="LightSteelBlue"
+| '''Neurologic'''
+|bgcolor="Beige"| [[Kearns-Sayre syndrome]]
+|-
+|-bgcolor="LightSteelBlue"
+| '''Nutritional/Metabolic'''
+|bgcolor="Beige"| No underlying causes
+|-
+|-bgcolor="LightSteelBlue"
+| '''Obstetric/Gynecologic'''
+|bgcolor="Beige"|  No underlying causes
+|-
+|-bgcolor="LightSteelBlue"
+| '''Oncologic'''
+|bgcolor="Beige"| No underlying causes
+|-
+|-bgcolor="LightSteelBlue"
+| '''Ophthalmologic'''
+|bgcolor="Beige"| No underlying causes
+|-
+|-bgcolor="LightSteelBlue"
+| '''Overdose/Toxicity'''
+|bgcolor="Beige"| No underlying causes
+|-
+|-bgcolor="LightSteelBlue"
+| '''Psychiatric'''
+|bgcolor="Beige"| No underlying causes
+|-
+|-bgcolor="LightSteelBlue"
+| '''Pulmonary'''
+|bgcolor="Beige"| [[Cor pulmonale]]
+|-
+|-bgcolor="LightSteelBlue"
+| '''Renal/Electrolyte'''
+|bgcolor="Beige"| [[Hyperkalemia]]
+|-
+|-bgcolor="LightSteelBlue"
+| '''Rheumatology/Immunology/Allergy'''
+|bgcolor="Beige"| No underlying causes
+|-
+|-bgcolor="LightSteelBlue"
+| '''Sexual'''
+|bgcolor="Beige"| No underlying causes
+|-
+|-bgcolor="LightSteelBlue"
+| '''Trauma'''
+|bgcolor="Beige"| No underlying causes
+|-
+|-bgcolor="LightSteelBlue"
+| '''Urologic'''
+|bgcolor="Beige"| No underlying causes
+|-
+|-bgcolor="LightSteelBlue"
+| '''Miscellaneous'''
+|bgcolor="Beige"| No underlying causes
+|-
+|}
-* [[Congenital aortic stenosis]]
+===Causes in Alphabetical Order===
-* [[Congenital heart disease]] repair
+*[[Cor pulmonale]]
-* [[Endocarditis]]
+*[[Cardiomyopathy]]
-* [[Myocarditis]] secondary to [[diphtheria]]
+*[[The heart in Chagas' disease|Chagas disease]]
+*[[Coronary artery disease]]
+*[[Diphtheria natural history, complications and prognosis|Diphteritic myocarditis]]
+*[[Hyperkalemia]]
+*[[Hypertensive heart disease]]
+*[[Kearns-Sayre syndrome]]
+*[[Limb-girdle muscular dystrophy]]
+*[[Myocardial infarction]]
+*[[Myotonic dystrophy]]
-== References ==
+==References==
-{{reflist|2}}
+{{Reflist|2}}
-{{WH}}
+[[Category:Crowdiagnosis]]
+[[Category:Cardiology]]
+[[Category:Up-To-Date]]
+[[Category:Up-To-Date cardiology]]
+[[Category:Arrhythmia]]
+[[Category:Electrophysiology]]
+[[Category:Disease]]
-{{WS}}
+{{WikiDoc Help Menu}}
+{{WikiDoc Sources}}