19 results
Torsades de Pointes 
•Precipitated by drugs that prolong the QT interval 
•Class IA antidysrhythmics (procainamide, quinidine)
Precipitated by drugs ... hypomagnesemia, hypokalemia ... TorsadesDePointes #Diagnosis ... #Cardiology #ECG ... #EKG
Torsades de Pointes
• "Twisting of the pointes" 
• QRS axis swings from positive to negative direction
precipitated by drugs ... Hypomagnesemia Hypokalemia ... TorsadesDePointes #Diagnosis ... #Cardiology #ECG ... #EKG
Causes of Fatigue - Differential Diagnosis Algorithm
Endocrine
 • Hypo/Hyperthyroidism
 • Diabetes
 • Pituitary Insufficiency
 • Adrenal
Metabolic • Renal ... Liver Failure • Hypercalcemia ... Neoplastic / Hematologic ... Chronic Obstructive Pulmonary ... Abuse (e.g.
Hyponatremia - Differential Diagnosis by Mechanism
Decr Blood Pressure (“Decr Effective Circulating Volume”) 
 - Volume depletion
- Malignancy (e.g ... CNS pathology (e.g ... pathology (e.g. ... exacerbation) - Drugs ... #Table #Causes
Rhabdomyolysis - Differential Diagnosis and Management Summary

Trauma:
 • Immobilization, Crush iniury, Compartment syndrome, Electrical injury
Exertional:
 •
- Differential Diagnosis ... and Management ... Drugs (Statins), ... Herpes, Coxsackie etc ... Dialysis for severe hyperkalemia
Rhabdomyolysis - Differential Diagnosis Framework and Management Summary

Causes of Rhabdomyolysis:
 • Trauma:
	- Immobilization
	- Crush injury
	- Compartment
- Differential Diagnosis ... Framework and Management ... - Toxins - Drugs ... Herpes, Coxsackie, etc ... #Management #causes
Hyperkalemia - Diagnosis and Management - GrepMed Handbook

S/Sx: Most pts asymptomatic. Weakness, cramping, nausea, paresthesias, palpitations,
Hyperkalemia - Diagnosis ... heparinized tube) • ECG ... 15 suggests ↓ renal ... Elimination (see Table ... #Diagnosis #Management
Indications for Serum Protein Electrophoresis (SPEP)
 • Suspected multiple myeloma, Waldenström's macroglobulinemia, primary amyloidosis, or related
chemotherapy, etc ... suspected • Hypercalcemia ... possible malignancy (e.g ... Electrophoresis #SPEP #Hematology ... #Diagnosis
Erythrocytosis - Polycythemia Differential Diagnosis Algorithm

Elevated Hemoglobin:
 • Males: Hb > 16.5 g/dL/HCT ≥ 49%
 •
Hypoxia-driven: Cardiac/pulmonary ... Hypoxia-independent: Post-renal ... Paraneoplastic (e.g ... , Testosterone/drug ... #Algorithm #hematology
Causes of ST Segment Elevation - Differential Diagnosis Framework

STEMI:
 • Upsloping convex STE: "Pardee's sign" +
- Differential Diagnosis ... QRS complex Pulmonary ... Sodium-channel blocking drugs ... #cardiology #ecg ... #ekg #electrocardiogram