Comment on the diagnosis of the ECG tracing shown below.
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.
First degree AV block, intranodal
Second degree AV block type1, intranodal
Second degree AV block type 2, infranodal
Third degree AV block
ECG and Arrhythmia 2