AV blocks: Difference between revisions
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*March out QRS complex | *March out QRS complex | ||
*Look at PR interval to determine relation | *Look at PR interval to determine relation | ||
{{AV block types}} | |||
==See Also== | ==See Also== | ||
Revision as of 22:39, 27 March 2024
Types
- First Degree AV Block
- Prolonged PR interval (>200msec) but constant and always conducts
- Second Degree
- Second Degree AV Block Type I (Wenckeback)
- Progressive prolongation with intermittent dropped QRS complexes
- Progressively shortening RR intervals
- Second Degree AV Block Type II
- PR interval is constant with intermittent P waves not conducting QRS complexes
- Surrounding RR intervals are constant
- Second Degree AV Block Type I (Wenckeback)
- Third Degree AV Block
- Complete Heart Block - no AV conduction
- Dissociation between P waves and QRS complexes
Evaluation
- March out P waves
- March out QRS complex
- Look at PR interval to determine relation
AV blocks
- First degree AV block
- Second degree
- Third degree AV block
- AV dissociation without complete heart block