Last updated November 23, 2025
Below is an ECG Exercise focused on the PR interval. Consider reading the following ECG Topics before proceeding:
- The PR Interval
- Pericarditis
- Wolff Parkinson White (WPW)
- Lown Ganong Leveine
- 1st degree av block
- 2nd degree av block
- 3rd degree av block
Comment on the PR segment and determine the diagnosis. Answer any associated quiz questions.
ECG 1
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ECG 2
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Questions
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ECG 3
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ECG 4

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ECG 5
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ECG 6
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ECG 7
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ECG 8
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ECG 9
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ECG 10
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ECG 11
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ECG 12
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ECG 13
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ECG 14
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ECG 15
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ECG 16
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ECG 17

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ECG 18

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ECG 19

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ECG 20

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ECG 21
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ECG 22

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ECG 23

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ECG 24
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ECG 25
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ECG 26

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Questions
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Related Posts
- ECG Exercise 13 - Dude, is this sinus?
- ECG Exercise 14 - Identify the AV block
- ECG Exercise 15 - Premature Contraction
- ECG Exercise 16 - Bradycardias
This post is educational and not medical advice.