what stops conduction of action potential - angelsmile

[ArchivalUser]

what stops conduction of action potential from one atrium to another?
pericardium/myocardium/sinus venosus/chordae tendinae

[ArchivalUser]

Chordae tendineae are binding papillary muscles to the AV valves so that one is out.
Sinus venosus and pericardium are superficial and do not interfere with the fibers.
Fibers from SA node go from the right to the left atrium through myocardium so that's the only possible answer imo.
Any1 else?

[ArchivalUser]

I think this is a rather interesting question and I can't seem to find any proper answer to it. Anyone?

[ArchivalUser]

AP are conducted from endocardium to epicardium; They are terminated from outside to inside (epicardium to endocardium). Since the only answer closest to endocardium here in Myocardium, that should be the answer.

[ArchivalUser]

I also think MYOCARDIUM is the answer

[ArchivalUser]

Well... Diagnosis of exclusion - Myocardium