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; which was deleted but the article about the SSS (sick SA) and remodelling is about its goal. The proposed treatment (laser ablation) of AF/AFL can backfire and cause SN (Sick Node) through remodeling. Assume there is no bypass of impulses through SA node.
- Can the heart still beat through AV node and bundle? Yes.
- Do you have any evidence that [heart] can "beat" properly on just the AVN? Yes, see article. Short-term mechanisms where electrical/metabolic remodeling. Long-term mechanisms where irregular rhythms and complete heart block can occur because of anatomical remodeling.
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: