Assertion: atrial fibrillation's heart rate | /r/HasProperty | about 100 to 170 bpm
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Source sentences:
text: The AV nodal refractoriness inhibits more than half of these action potentials from reaching the ventricles; thus, the typical ventricular heart rate in patients with atrial fibrillation — in the absence of AV blocking medications — is about 100 to 170 bpm.