A member asked:

Help please? what is the threshold voltage in cardiac muscle?

A doctor has provided 1 answer
Dr. Bennett Werner answered

Specializes in Cardiology

Depends: It depends on which cardiac muscle tissue. In the SA node, its around -50 mv. In subsidiary pacemakers it can be as much as -90 mv.

Answered 9/28/2016

3.9k views

Thank

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