Second degree AV block causes: Difference between revisions
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===Common Causes=== | ===Common Causes=== | ||
* [[Acute rheumatic fever]] | * [[Acute rheumatic fever]] | ||
* [[Bacterial endocarditis]] | * [[Bacterial endocarditis]]<ref name="pmid27585419">{{cite journal |vauthors=Kamatani T, Akizuki A, Kondo S, Shirota T |title=Second-Degree Atrioventricular Block Occurring After Tooth Extraction |journal=Anesth Prog |volume=63 |issue=3 |pages=156–9 |date=Fall 2016 |pmid=27585419 |pmc=5011958 |doi=10.2344/15-00042.1 |url=}}</ref> | ||
* [[aortic stenosis|Calcific aortic stenosis]] | * [[aortic stenosis|Calcific aortic stenosis]] | ||
* [[Digoxin]] | * [[Digoxin]] | ||
Revision as of 01:35, 4 March 2020
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Second degree AV block Microchapters |
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Diagnosis |
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Treatment |
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Case Studies |
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Second degree AV block causes On the Web |
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American Roentgen Ray Society Images of Second degree AV block causes |
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Risk calculators and risk factors for Second degree AV block causes |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Cafer Zorkun, M.D., Ph.D. [2]; Mahmoud Sakr, M.D. [3]
Overview
Atrioventricular (AV) block is defined as an interruption in the transmission of an impulse, either transient or permanent, from the atria to the ventricles due to an anatomic or functional impairment in the conduction system. In second degree AV block, some atrial impulses fail to reach the ventricles. Wenckebach described progressive delay between atrial and ventricular contraction and the eventual failure of an atrial beat to reach the ventricles. Mobitz subsequently divided second degree AV block into two subtypes, as determined by the findings on the electrocardiogram. In Mobitz type I AV block, progressive PR interval prolongation precedes a non-conducted P wave. While in Mobitz type II AV block, the PR interval remains unchanged prior to a P wave that suddenly fails to conduct to the ventricles.
Causes
Life Threatening Causes
Life-threatening conditions can result in death or permanent disability within 24 hours if left untreated[1].
- Acute myocardial infarction[2][3]
- Acute rheumatic fever
- Bacterial endocarditis
- Myocarditis
- Severe hypothermia
Common Causes
- Acute rheumatic fever
- Bacterial endocarditis[4]
- Calcific aortic stenosis
- Digoxin
- Dilated cardiomyopathy
- Diltiazem
- Enhanced vagal tone
- HCM
- Hypertension
- Iatrogenic after surgical correction of VSD, tetralogy of Fallot, and endocardial cushion defect
- Inferior ST elevation MI
- Massive calcification of the mitral annulus
- Myocarditis
- Normal variants
- Penetrating and non-penetrating trauma of the chest
- Sclerodegenerative disease of the electrical conduction system
- Verapamil
- β blockers
Causes by Organ System
Causes in Alphabetical Order
References
- ↑ Mangi MA, Jones WM, Napier L. PMID 29493981. Missing or empty
|title=(help) - ↑ Misumida N, Ogunbayo GO, Kim SM, Abdel-Latif A, Ziada KM, Elayi CS (November 2018). "Frequency and Significance of High-Degree Atrioventricular Block and Sinoatrial Node Dysfunction in Patients With Non-ST-Elevation Myocardial Infarction". Am. J. Cardiol. 122 (10): 1598–1603. doi:10.1016/j.amjcard.2018.08.001. PMID 30227965.
- ↑ Barold SS, Herweg B (December 2012). "Second-degree atrioventricular block revisited". Herzschrittmacherther Elektrophysiol. 23 (4): 296–304. doi:10.1007/s00399-012-0240-8. PMID 23224264.
- ↑ Kamatani T, Akizuki A, Kondo S, Shirota T (Fall 2016). "Second-Degree Atrioventricular Block Occurring After Tooth Extraction". Anesth Prog. 63 (3): 156–9. doi:10.2344/15-00042.1. PMC 5011958. PMID 27585419.