Medical MCQ-Comment on the diagnosis of the ECG tracing shown below.

Comment on the diagnosis of the ECG tracing shown below.

First degree AV block, intranodal

Second degree AV block type1, intranodal

Second degree AV block type 2, infranodal

Third degree AV block

Question Category:

Medicine

Correct Answer:

Second degree AV block type 2, infranodal

Description:

Symmetry in PR interval before and after the missed beat --> Indicating Second degree AV block type 2: infranodal. In Second degree AV block type 1 --> Serial lengthening of PR interval before and after the missed beat. In Third degree AV block --> complete dissociation b/w atria and ventricles.

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