What determines heart rate during a-fib? The AV node does. The AV node is the gateway to the ventricles and slows down the rapid atrial rate of atrial fibrillation. It determines how fast the heart goes in a-fib.
What determines heart rate during a-fib? The AV node does. The AV node is the gateway to the ventricles and slows down the rapid atrial rate of atrial fibrillation. It determines how fast the heart goes in a-fib.