What is the mechanism of Atrial flutter in Rheumatic MS with a grossly dilated , scarred LA ? (poll 8176132)

What is the mechanism of Atrial flutter in Rheumatic MS with a grossly dilated , scarred LA ?

Isthumus dependent counterclockwsie flutter

Isthumus dependent clockwise flutter

It is an isolated left atrial flutter invloving IAS and free wall of LA

Single macro renetrant circuit within the left atrial side of the IAS.

Any of the above mechsnism can be opertive

Other:

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