Hypokalemia: Difference between revisions
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*GI | *GI | ||
**Ileus | **Ileus | ||
*Renal | |||
**Met alkalosis | |||
*CV | *CV | ||
**ECG findings: | **ECG findings: | ||
| Line 17: | Line 19: | ||
**Also may cause: | **Also may cause: | ||
***PACs/PVCs | ***PACs/PVCs | ||
**Bradycardia or atrial/junctional tachycardia | ***Bradycardia or atrial/junctional tachycardia | ||
**AV block | ***AV block | ||
**V tach, V fib | ***V tach, V fib | ||
== DDX == | == DDX == | ||
Revision as of 18:16, 9 April 2011
Background
Low = <3.5meq/L
Low! = <2.5meq/L
Diagnosis
- CNS
- Weakness
- Cramps
- Hyporeflexia
- GI
- Ileus
- Renal
- Met alkalosis
- CV
- ECG findings:
- ST seg depression
- U wave (V4-V6)
- Also may cause:
- PACs/PVCs
- Bradycardia or atrial/junctional tachycardia
- AV block
- V tach, V fib
- ECG findings:
DDX
- Shift
- Increased pH
- B-agonist, inuslin
- Reduced intake
- Increased loss
- Renal
- Primary (hyperaldos, osmotic diuresis)
- Secondary (diuretics, malignant HTN, renal art stenosis)
- Misc
- Licorice
- HyperCa
- HypoMg
- RTA
- Leukemia
- Renal
- Drugs
- PCN
- Lithium
- L-dopa
- Theophyline
- GI Loss (v/d/fistula)
Treatment
- 20meq/h KCl IV or PO
- every 10meq should inc serum by ~0.1meq/L)
- Treat hypomag if present
Source
Tintinalli