A 60 year old cardiac patient has irregular heartbeats.
What is the single most likely correct order of electrical conduction in the heart?

Question

A 60 year old  cardiac patient has irregular heartbeats. 
 What is the single most likely correct order of electrical conduction in the heart?

Answer

SA node → AV node → Purkinje fibers → Bundle of His

Answer

AV node → Bundle branches → Purkinje fibers

Answer

AV node → SA node → Purkinje fibers → Bundle branches

Answer

AV node → SA node → Bundle branches → Purkinje fibers

Answer

SA node → AV node → Bundle of His → Purkinje fibers

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