Question: Your grandfather was told that his SA node ( pacemaker ) had stopped functioning. Explain how his heart is still beating at a rate of

Your grandfather was told that his SA node

(

pacemaker

)

had stopped functioning. Explain how his heart is still beating at a rate of

40 - 50

times per minute. Are the atria still being stimulated to contract, and what area of the heart is stimulating them? Be thorough and complete in your response.

Your grandfather was told that his SA node (pacemaker) had stopped

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