In 2nd degree heart block.

a. Some impulses are being conducted through the ventricle but some are not getting through.
b. Impulses that got to the AV node from the SA node is not the impulse that got to the ventricle to contract. The impulse that got to the ventricle to contract came from somewhere else in the conducting system.
c. Impulses are being conducted through the AV node but being delayed


Answer: a. Some impulses are being conducted through the ventricle but some are not getting through.

Health & Biomechanics

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