acetylcholine and cardiac muscle

Hi,


At first, I chose "cardiac arrest" because if Acetylcholine was unable to bind to the receptors, eventually it will lead to a lack of contraction, in this case I pictured cardiac muscle cells, thus why I chose cardiac arrest.

However, the answer was "diaphragmatic paralysis" which also makes sense with skeletal muscle.

But, could someone tell me why cardiac arrest doesn't make sense?

Please help.



Thanks!



I didn't find the right solution from the Internet.



References:

forums.studentdoctor.net/threads/khan-acetylcholine-and-cardiac-muscle.1294424/

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