EKG and Electrical Pathway of the Heart

Which structure slows down the electrical impulse to allow the atria to fully contract before the ventricles begin to contract?

• SA node

• AV node

• bundle of His

• Purkinje fibers

Which structure of the cardiac conduction system extends from the SA node to the left atrium?

• Bundle of His

• Internodal pathway

• Bachmann's Bundle

• Purkinje Fibers

What happens if your right bundle branch is severed?

• Your right atrium won't contract

• Your left atrium won't contract

• Your right ventricle won't contract

• Your left ventricle won't contract

Which part of the cardiac conduction system is known as the "gatekeeper" since it makes sure pacing is correct?

• SA node

• AV node

• Bundle of His

• Bachmann's Bundle

Heart blocks can...

• Slow down the conduction of electrical impulses

• Speed up the conduction of electrical impulses

• Completely stop the conduction of electrical impulses

Heart blocks most commonly are

• SA blocks

• AV blocks

• Intra-Hisian blocks

• Fascicular blocks

Which of the EKG strips show a first degree heart block?

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Which of the EKG strips show a second degree type 1 heart block?

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Which of the EKG strips show a second degree type 2 heart block?

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Which of the EKG strips show a third degree heart block?

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