15 results
Antiarrhythmics Pharmacology Summary
Cardiac Conduction Phases:
Phase 0 - Ventricular Depolarization:
 • Na+ channels open leading to a
Vaughan Williams Classification ... prolong AV node repolarization ... Block K+ channels (primarily ... interval (delays time repolarization ... #Pharmacology #Classification
Antiarrhythmics - Vaughan Williams Classification:
CLASS 1 - Sodium Channel Blockers:
 • MOA: Block fast Na+ channels
Vaughan Williams Classification ... prolong AV node repolarization ... Block K+ channels (primarily ... prolong AV node repolarization ... #Pharmacology #Classification
Hypokalemia - Differential Diagnosis
Poor Intake 
 - Starvation
 - Anorexia
GI Losses 
 - Vomiting / NG
Ureterosigmoidostomy Urinary ... and 2, but not type ... Differential #Diagnosis #Low ... #Potassium #Table ... #Classification
Shock Classification and Differential Diagnosis
SHOCK
 • MAP <65, SBP <90, drop in SBP > 40
 •
Shock Classification ... Differential Diagnosis SHOCK ... Blood Loss, GI Losses ... #Classification ... Differential #Diagnosis #Types
The Diagnostic Approach to Hyperkalemia
Drugs
 - Amiloride
 - Spironolactone
 - Triamterene
 - Trimethoprim
 - Pentamidine
 -
obstruction _ pHA type ... I, type II - ... High Renin - Primary ... Ketoconazole Low ... #Hyperkalemia #Algorithm
Hypomagnesemia - Etiologies by Mechanism

Decreased GI Uptake 
 - Poor dietary intake (particularly common in alcoholics)
inhibitors - Primary ... Differential #Diagnosis #Low ... #Magnesium #Table ... #Classification ... #Causes #Workup
Causes of Lactate Elevation, Lactic Acidosis - Differential Diagnosis

The most common causes of hyperlactatemia are usually:
undifferentiated shock ... is in impending shock ... perfusion - shock ... LV failure - Low ... classification
Causes of Nephrolithiasis - Differential Diagnosis Algorithm
Radio-opaque - Calcium-containing - 90% of stones
Radiolucent - Non-calcium 10%
Differential Diagnosis Algorithm ... of stones: • Urinary ... overproduction • Low ... solubility: • Low ... Hypocitraturia • RTA Type
Physiologic Approach to Hypotonic Hyponatremia
The next time you have a case of hypotonic hyponatremia, give the
normal volume-based algorithm ... can be high or low ... water intake (Primary ... polydipsia), Low ... differential #diagnosis #table
Perhaps quite too often, the knee-jerk reaction to an elevated Troponin is to call our friends
heart (Sepsis, Shock ... are typically able ... us to treat the primary ... dealing with the primary ... clinica l#foamed #algorithm