Question

Why there may be changes in cardiac and nerve excitability when potassium retention occurs in renal failure?

Answer 1

Is the potassium retention occurs inside the cells or outside in the blood?Im really confused

Answer 2

High potassium in the blood.......

Intracellular potassium is higher than extracellular potassium due to Na/K active pumps. If you have high potassium in the blood.....then your heart cannot have a normal "beat"

Answer 3

I would give you the answer, but people are reporting me for giving out the answer.

Answer 4

So,if the intracellular potassium is high would that mean that high potassium amounts would leak outside the cells causing hyperkalemia in the blood, thus increasing the rate of repolarisation and so the heart would beat more slower because of the high outflux of potassium resulting from hyperpolarisation inside the cells?

Answer 5

How does high potassium levels causes the heart to pump faster and what about the repolarisation of potassium channels during action potential?Im still confused tx

Answer 6

Im confused now. lol Let me think

Answer 7

lol,its ok.

Answer 8

use google :D

Answer 9

Tetany occurs when things are overexciting like high extracellular Ca2+ in the muscles. This would cause your muscle to twitch.

Maybe this is related to the heart with high K+ level in the blood.

Answer 10

Ok,tx for you help

Answer 11

I just asked my doctor :)

He said..... It can cause premature atrial/ventricular contractions. Not really increased in heart rate because everyone has different tolerance to K+ levels

Answer 12

LOL you rang up your doctor???

Answer 13

So it doesn't cause fibrillation of the heart?

Answer 14

Anyway,thanks for your help.Really appreciate it^^