Hypokalemia: Difference between revisions
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**ECG findings: | **ECG findings: | ||
***ST seg depression | ***ST seg depression | ||
***U wave (V4-V6) | ***U wave (V4-V6) | ||
**Also may cause: | **Also may cause: | ||
***PACs/PVCs | ***PACs/PVCs | ||
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**every 10meq should inc serum by ~0.1meq/L | **every 10meq should inc serum by ~0.1meq/L | ||
*Treat hypomag if present | *Treat hypomag if present | ||
==Image== | |||
[[Image:ECG Hypokalemia.jpg]] | |||
==Source == | ==Source == | ||
Revision as of 05:19, 4 October 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
- Alkalosis (each 0.10 rise in pH causes 0.5 decrease)
- Insulin
- B-agonist
- Decreased intake
- Increased loss
- GI (v/d/fistula)
- Renal
- Diuretics
- Hyperaldo
- Exercise
- HyperCa
- HypoMg
- Drugs
- PCN
- Lithium
- L-dopa
- Theophyline
Treatment
- 20meq/hr KCl IV or PO
- every 10meq should inc serum by ~0.1meq/L
- Treat hypomag if present
Image
Source
Tintinalli's