Third degree AV block: Difference between revisions
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Revision as of 04:27, 26 July 2016
Background
- Atria and ventricles beat independently from each other
Causes
- Congenital
- Acquired
- Ischemia
- Drugs
- Structural heart disease
Clinical Features
- Dizziness
- Syncope
- Hypotension
Differential Diagnosis
AV blocks
- First degree AV block
- Second degree
- Third degree AV block
- AV dissociation without complete heart block
Evaluation
- No atrial impulses are conducted
- P waves normal and regular P-P intervals unrelated to slower regular R-R intervals
- QRS narrow if block above bundle of His
- QRS wide if block below bundle of His
- PR variable
Management
- Pacemaker placement
Disposition
- Admission