The action potential in myocardial cells is triggered by the spread of depolarization originating from the pacemaker cells.
By spread of depolarization from pacemaker cells <img src="paste-8d5e1df5d448be33b7690920ced776de888f5e4f.jpg"> <br>
| Front | How is the myocardial AP triggered? |
|---|---|
| Back | By spread of depolarization from pacemaker cells |
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