Heart Block Is a Condition in Which the SA Node

question 8

Multiple Choice

Heart block is a condition in which the SA node is properly functioning but the atria and ventricles are contracting out of synch.What part of the heart must not be functioning for this to happen?

• A)The SA node is working extra hard to make the ventricles catch up.
• B)The AV node is not sending signals to the ventricles like it should.
• C)The coronary arteries are not delivering blood to the heart.
• D)The heart valves are allowing blood to flow backwards through the heart.

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