Concealed Conduction: Atrial Flutter

Report:

Sinus rhythm

Left atrial abnormality (LAA)

Second degree 2:1 AV block

Atrial flutter 300/min

Third degree AV block

Idioventricular escape rhythm 41/min

Inferoposterolateral MI, age uncertain, probably old

Comment:

The (concealed) conduction of the flutter to the AV node is only manifest by its effect on AV nodal conduction: it is not visible per se. That is why it is called concealed.

A similar example is provided by Marriott14.

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