Second degree AV block type I: Difference between revisions
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==Evaluation== | ==Evaluation== | ||
*[[ECG]] | *[[ECG]] | ||
**Progressive prolongation of PR interval on consecutive beats | |||
**Dropped QRS beat not conducted to ventricle after maximal PR prolongation | |||
**After dropped QRS complex, PR interval resets and again begins the cycle of progressive prolongation | |||
==Management== | ==Management== | ||
Revision as of 18:35, 7 March 2019
Background
- Also known as a Mobitz I or Wenkebach AV block
- Disturbance of atrial impulse conducting through the AV node
- Considered more benign than Mobitz II as it is not associated with histological changes
Clinical Features
Differential Diagnosis
AV blocks
- First degree AV block
- Second degree
- Third degree AV block
- AV dissociation without complete heart block
Evaluation
- ECG
- Progressive prolongation of PR interval on consecutive beats
- Dropped QRS beat not conducted to ventricle after maximal PR prolongation
- After dropped QRS complex, PR interval resets and again begins the cycle of progressive prolongation
Management
Disposition
- Generally outpatient
- 2:1 block[1]
- May be unable to determine if Type I or type II
- If so, assume type II and admit with cardiology
See Also
External Links
References
- ↑ Sovari AA et al. Second-Degree Atrioventricular Block Treatment & Management. eMedicine. Apr 28, 2014. http://emedicine.medscape.com/article/161919-treatment#showall.