Hypokalemia

  • Normal potassium: 3.5 – 5 mEq\L

 

  • Alkalosis + insulin + epinephrine + B-agonists + ↑ aldosterone -> hypokalemia
  • Acidosis + B-blockers + digoxin + cell lysis + ↓ aldosterone -> hyperkalemia

 

  • Hypokalemia predisposes pt to digoxin toxicity
  • Digoxin toxicity causes hyperkalemia

 

Presentation:

Heart and muscles: weakness, paralysis, arrhythmias. Nephrogenic DI

Hypokalemia 1

 

Bartter syndrome: loop of Henle dysfunction (furosemide-like effect)

Gitelman’s syndrome: distal convoluted tubule dysfunction (thiazide-like effect)

 


Download the PDF version: here


References:

  • Step up to medicine
  • Dr Alqahtani’s lecture

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

w

Connecting to %s

%d bloggers like this:
search previous next tag category expand menu location phone mail time cart zoom edit close