18 results
Antiarrhythmics - Vaughan Williams Classification
Class I (Ia, Ib, Ic) - Na+ Channel Blockade
 • Slows depolarization
Vaughan Williams Classification ... Ib, Ic) - Na+ Channel ... rate and prolongs PR ... rate and prolongs PR ... VaughanWilliams #Classification
Antiarrhythmics - Vaughan Williams Classification:
CLASS 1 - Sodium Channel Blockers:
 • MOA: Block fast Na+ channels
Vaughan Williams Classification ... of phase 4 to slow ... depolarization • ↑ PR ... velocity) - ↑ PR ... #Pharmacology #Classification
Antiarrhythmics Pharmacology Summary
Cardiac Conduction Phases:
Phase 0 - Ventricular Depolarization:
 • Na+ channels open leading to a
open leading to slow ... Vaughan Williams Classification ... depolarization • ↑ PR ... velocity) - ↑ PR ... #Pharmacology #Classification
Hyperkalemia shortens repolarization; changes in the T wave provide the earliest clues to hyperpotassemia.
 - At
Hyperkalemia shortens ... repolarization; changes ... causes prolonged PR ... #EKG #ECG #Changes ... #Progression #Table
Hypokalemia Differential Diagnosis Algorithm

Low intake 
• poor oral intake 

Renal loss 
• Medication 
• Hypomagnesemia 
•
Hypokalemia Differential ... Diagnosis Algorithm ... Low intake ... amzn.to/2LmUODZ #Hypokalemia ... #Causes #Classification
Hyperkalemia - Management Algorithm
 • IV calcium
 • IV insulin and glucose and/or salbutamolt
 • Consider
Hyperkalemia - Management ... Algorithm • IV ... potassium and ECG changes ... waves, Prolonged PR ... , asystole #hyperkalemia
Hypomagnesemia - Etiologies by Mechanism

Decreased GI Uptake 
 - Poor dietary intake (particularly common in alcoholics)
abnormalities - Hypercalcemia ... - Hypokalemia ... Differential #Diagnosis #Low ... #Magnesium #Table ... #Classification
Hypokalemia - Differential Diagnosis
Poor Intake 
 - Starvation
 - Anorexia
GI Losses 
 - Vomiting / NG
Hypokalemia - Differential ... DrEricStrong #Hypokalemia ... Differential #Diagnosis #Low ... #Potassium #Table ... #Classification
Emergent Hyperkalemia Treatment Algorithm
ECG changes, weakness, K+ >6.5 Or renal insufficiency with K >5.5 with cellular
Emergent Hyperkalemia ... Treatment Algorithm ... ECG changes, weakness ... injury, etc) ECG changes ... waves, prolonged PR
Hyperkalemia - Diagnosis and Management - GrepMed Handbook

S/Sx: Most pts asymptomatic. Weakness, cramping, nausea, paresthesias, palpitations,
, ST depress, ↑PR ... Elimination (see Table ... acidosis) • Low ... K-Binding Resins - Exchanges ... SPS (15-60g PO/PR