Assertion: atrioventricular node | /r/HasProperty | a back‐up pacemaker
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Source sentences:
text: The atrioventricular node has other functions as well: it is a back‐up pacemaker (in case the sino‐atrial node fails) and, if the atria are beating too rapidly (as in atrial fibrillation), the atrioventricular node limits the number of action potentials conducted to the ventricles.