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A member asked:

What does pac, activation mark mean on an ekg? i understand that pac means premature atrial contraction, but what is activation mark?

A doctor has provided 1 answer
Dr. Hogan Shy answered

Pac: I presume the activation mark is where the premature artrial electrical signal begins for the early beat. On a ekg, it would be the p wave where the PAC starts. Best of luck-

Answered 2/6/2019

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