| 1st Degree AV Block |
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| NOTE: In the interpretation always state the underlying rhythm. For example, the rhythm above would be interpreted this way: |
| NSR with a 1st degree AV Block |
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| 2nd Degree AV Block Mobitz I |
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| NOTE: There is NO underlying rhythm with the 2nd Degree AV Block Mobitz I |
| Interpretation: 2nd Degree AV Block Mobitz I |
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| 2nd Degree AV Block Mobitz II |
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| NOTE: There is NO underlying rhythm with the 2nd Degree AV Block Mobitz II |
| Interpretation: 2nd Degree AV Block Mobitz II |
| Class, please note below. The 2nd Degree AV Block Mobitz II very often develops a 2:1 conduction with 2 'P' waves for every QRS complex. Please see below; Interpretation: 2nd Degree AV Block Mobitz II: 2:1 Conduction (The arrows point out the 'P' waves) |
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| 3rd Degree AV Block |
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| The 3rd Degree AV Block is often referred to as a complete heart block because there is no communication or association of the atria and ventricles. Each has its own pacemaker working independently. Note how inconsistent the 'PRI' lengths are! With the 3rd Degree AV Block the PRIs lengths vary because the atria and ventricles are depolarizing independently. |
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