Assertion: pacemaker's rate | /r/HasProperty | avn= 40-60 beats per minute
Facets:
Source sentences:
text: Pacemaker activity of these cells is vital, as it means that if the SAN were to fail, then the heart could continue to beat, albeit at a lower rate (AVN= 40-60 beats per minute, purkinje fibres = 20-40 beats per minute).