asked qs -

[ArchivalUser]

david

first they describe a patient with Mi who gets Cardiac arrythmia and recieves lidocaine
lido caine acts on
SA NOde
av node
internodal fibers
purkinjee fibers

[ArchivalUser]

Kiddoc

I am not sure if you are asking a question or not. Lidocaine is a class Ib antiarrhythmic drug. It blocks fast Na+ channels in phase 0. I would quess that it would work specifically on ventricular repolarization. SA and AV nodes lack fast Na+ Channels, so I doubt it works on them. Please let me know if you have found anything different. Good Luck in the future!!!

[ArchivalUser]

david

You are close if you look at ventricular and purkinjee fiber action potential they are similar so it will act on purkinjee fibers It was asked in my exam

[ArchivalUser]

david

and the choice was not ventricular mussle

[ArchivalUser]

Kiddoc

I agree..everything I wrote was intended to reflect upon the purkinje fibers...Thanks!

[ArchivalUser]

adr

I don't think this qs has trick, bz lidocaine is often used for ventricular arrythmia which is often due to abnormal conduction through purkinjee fibers.

[ArchivalUser]

kiddoc

Perhaps this question does not have "trick" as you put it, but it seems rather interesting to have a cerebral conversation with other students. We need to appreciate any and all help, and input from all students, and keep this website "productive". Thanks!