Atrial flutter results from circus reentry, a condition during which the impulse from the SA node circles back through the atria, returning to the SA node region and repeatedly restimulates the AV node over and over.

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Quizplus · Accepted Answer

Atrial flutter is indeed caused by a reentrant circuit, but it typically does not involve the SA node. Instead, the reentrant circuit is usually confined within the atria, often around the tricuspid valve in the right atrium, and repeatedly stimulates the AV node.

Atrial Flutter Results from Circus Reentry, a Condition During Which