Q for super usmle candidate!!! - raheem

[ArchivalUser]

what is cardiac electrolytes and action potential changes in cardiac ischemia?

[ArchivalUser]

dec--na, k and ca .
increased ---hco3.
action -potential will be dec too. An action -potential will be terminated by binding to ryonidine ca channels and release ca, so this process is slow in ischaemia and infarction.
let me know if i am wrong.

[ArchivalUser]

interstitial k inc. due to cardiac muscle damage

[ArchivalUser]

inside the ischemic cells, increased Na, Ca and decreased action potential......

[ArchivalUser]

bedidee,,,,,,,,,lipoma said all decrease

[ArchivalUser]

inside ischemic cells, due to low O2 and anerobic glycolysis, won't there be lactic acidosis hence increased H+ and decreased HCO3- ?

[ArchivalUser]

can u please tell the ans..with explain.... in ischemia, due to non functional Na-K pump, Na wil be increases and so will Ca....

[ArchivalUser]

and agree with usmedipro... lactic acidosis.....

[ArchivalUser]

nice,,usmedpro,,,,what about electrolytes and action potenttial,,,please

[ArchivalUser]

We have increase Na and that is why in a ischemic tissue we want to give Lidocaine who is blocking those channels....
Antonella