Normally, myocardial cells do not require an electrical stimulus in order to contract.

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Myocardial cells, or heart muscle cells, have an intrinsic ability to generate electrical impulses that lead to their contraction, a property known as automaticity. However, these cells typically do require an electrical stimulus to initiate each contraction, either from their own automatic pacemaker cells (like the SA node) or from an external source in the case of artificial pacemakers.

Normally, Myocardial Cells Do Not Require an Electrical Stimulus in Order