A 22-year-old male asked:
Disclaimer

what mechanism that high potassium causes cardiac arrest? i just know high k+ causes hyper excitability of cells?

1 doctor answer
Dr. Thomas Knecht
A Verified Doctor answered
A US doctor answered Learn more
Cell repolarization: When cardiac muscle cells fire, they use up part of the electrochemical gradient they maintain in life. They are repolarized by an outward potassium (K+) flux across the plasma membrane. This outward K+ current depends on the K+ electrochemical gradient. If the "outside" K+ (in blood & interstitial fluid) is very high, that destroys the K+ electrochemical gradient, the cells can't repol; they stop
Answered on Aug 28, 2014

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Personalized answers
Free
Talk to a doctor
24/7 visits
$15 per month

Related questions:

A 17-year-old male asked:
Dr. Masoud Sadighpour
38 years experience Internal Medicine
By 911 on spot: By 911 on spot and continued in er.
1
1 thank
A 23-year-old member asked:
Dr. Tarek Naguib
40 years experience Nephrology and Dialysis
Urinary losses: Unless you have long standing diarrhea or take water pills, you abnormally lose potassium in urine. Need to see a nephrologist. It is possible that yo ... Read More
1
1 thank
A 40-year-old female asked:
Dr. Ipe Kalathoor
17 years experience Internal Medicine
Anemia : Your symptoms could be from irin deficiency anemia from bleeding from somewhere which includes menstruation. No potassium is not explainable , are you ... Read More
2
2 thanks
A 17-year-old male asked:
Dr. Bassam Amawi
49 years experience Psychiatry
Cardiac arrest ?: Defibrillator r used in case of emergency to treat a cardiac arrest but it is important to check the reasons for the arrest and correct any lab ... Read More
1
1 thank

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Personalized answers
Free
Talk to a doctor
24/7 visits
$15 per month