10 results
Hypermagnesemia - Etiologies by Mechanism
Renal Failure 
Excessive Mg Administration 
 - Massive PO intake
Hypermagnesemia ... intake - Magnesium ... DrEricStrong #Hypermagnesemia ... #Table #Causes ... #Management
Magnesium Electrolyte Repletion
Oral - Only do if patient does not tolerate IV
 • Magnesium oxide (can
Magnesium Electrolyte ... oxide (can cause ... diarrhea and cause ... Electrolyte #Repletion #management ... #hypomagnesemia
Hypomagnesemia - Etiologies by Mechanism

Decreased GI Uptake 
 - Poor dietary intake (particularly common in alcoholics)
Hypomagnesemia - ... Primary intestinal hypomagnesemia ... Diagnosis #Low #Magnesium ... #Table #Classification ... #Causes #Workup
Symptoms and Signs of Hypomagnesemia
Neuromuscular:
 - Tetany, Muscle weakness, Chvostek and Trousseau signs, Cerebellar (ataxia, nystagmus,
Symptoms and Signs of Hypomagnesemia ... Muscle weakness, Chvostek ... Dysphagia, Anorexia, nausea ... Hypocalcemia, Anemia #Hypomagnesemia ... #magnesium #Symptoms
Potassium Electrolyte Repletion
If patient also has hypomagnesemia, replete magnesium before repleting potassium
Oral:
 • Pills (ask pharmacy
patient also has hypomagnesemia ... , replete magnesium ... Intravenous (can cause ... Electrolyte #Repletion #management
Hypokalemia - Differential Diagnosis
Poor Intake 
 - Starvation
 - Anorexia
GI Losses 
 - Vomiting / NG
- Polyuria - Hypomagnesemia ... Low #Potassium #Table ... #Classification ... #Causes
Hypermagnesemia - Diagnosis and Management

Hypermagnesemia is a serum magnesium concentration > 2.6 mg/dL.
Symptoms include hyporeflexia, hypotension,
Hypermagnesemia ... Diagnosis and Management ... mortality in ICU Causes ... helpful in severe cases ... #Diagnosis #Management
Potassium-Binding Agents to Treat Hyperkalemia
Sodium zirconium cyclosilicate (Lokelma):
 • Mechanism: Preferentially captures K in exchange for
K; also binds magnesium ... Side Effects: Hypomagnesemia ... nonspecifically binds K, magnesium ... hypokalemia); nausea ... #pharmacology #table
Recurrent Polymorphic VT/Torsades de Pointes - Management Algorithm
Drugs that prolong QT interval:
 • Class 1a (quinidine,
Torsades de Pointes - Management ... Abnormalities: Hypomagnesemia ... TdP First line: magnesium ... 1b (lidocaine)- case ... TorsadesdePointes #TDP #Management
Evaluation and Management of Hypokalemia

Hypokalemia is often asymptomatic. Evaluation begins with a search for warning signs
Evaluation and Management ... Most cases of hypokalemia-induced ... important because management ... of concurrent hypomagnesemia ... important because magnesium