Assume a patient with previous cardial infaction which SA node not possible to activate action potential anymore. However, SA trying to beat unsuccessfully repeatedly waisting energy. Therefore, I thought in this discussion about the possibility to stop Sinus node from trying to start action potential.
Now, I want to understand if the sinus node is a necessary part of heart's conduction system.
Assume there is no bypass of impulses through SA node. Can the heart still beat through AV node and bundle?
I want to know if these pacemakers are in series or parallel. If they are in series, then laser operation can be dangerous to the SA node. The series connection is however the idea which I get from many schematic drawings:
Is Sinus node necessary part of the heart's conduction system?