What is likely to occur when sa node of heart fails to function?
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▶ If the SA Node fails to fire, or fires at a much slower rate, the AVnode may take over as pacemaker at a rate of 40 - 60 BPM. The AV Node then delays relay of the impulse to the Bundle of His to allow the atria to empty into the ventricles before the ventricular contraction starts.
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