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A 45-year-old member asked:

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

1 doctor answer4 doctors weighed in
Dr. Bennett Werner
Cardiology 46 years experience
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.
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Last updated Sep 28, 2016

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