44 results
Antiarrhythmics - Vaughan Williams Classification:
CLASS 1 - Sodium Channel Blockers:
 • MOA: Block fast Na+ channels
Classification: CLASS ... 1 - Sodium Channel ... reduce speed of ion conduction ... current) causing ↓SA ... to ↑ ERP (slow conduction
Antiarrhythmics Pharmacology Summary
Cardiac Conduction Phases:
Phase 0 - Ventricular Depolarization:
 • Na+ channels open leading to a
Summary Cardiac Conduction ... Classification: CLASS ... reduce speed of ion conduction ... current) causing ↓SA ... to ↑ ERP (slow conduction
Anatomical Differential Diagnosis for Arrhythmias
 • SA node: Sinus bradycardia, Sick Sinus Syndrome (SSS)
 • AV
Arrhythmias • SA ... escape rhythm, Conduction ... His-purkinje system: Conduction ... > 100 bpm) • SA ... Differential #Diagnosis #Causes
Antiarrhythmic Medications - Vaughan Williams Classification - Summary Table
Class I agents - Sodium Channel Blockers⠀
Class II
Classification - Summary Table ... - Sodium Channel ... agents - Potassium Channel ... agents - Calcium Channels ... Classification #Summary #Table
Hyperkalemia shortens repolarization; changes in the T wave provide the earliest clues to hyperpotassemia.
 - At
repolarization; changes ... L, decrease in conduction ... wave to produce classic ... Hyperkalemia #EKG #ECG #Changes ... #Progression #Table
Arrhythmias - Differential Diagnosis Algorithm

Bradyarrhythmia (<60 bpm)
 • Sinus Bradycardia
 • Sick Sinus Syndrome
 • SA
Sinus Syndrome • SA ... with Variable AV Conduction ... rhythm SVT with conduction ... rhythm SVT with conduction ... Diagnosis #Algorithm #causes
Class I Antiarrhythmics and their Key Pharmacologic Properties

Class IA = Quinidine, Procainamide, Disopyramide ("Quarter PounDer")
Class IB
Class I Antiarrhythmics ... Block fast Na+ channels ... This decreases conduction ... on EKG • Na+ channel ... actions on K+ channels
Tachycardia - Differential Diagnosis Table - Wide vs Narrow, Regular vs Irregular

Regular Rhythm - Narrow Complex
Differential Diagnosis Table ... HyperK vs VT > SVT+conduction ... PMVT vs AFib + conduction ... Differential #Diagnosis #Table ... Narrow #Irregular #causes
Antiarrhythmics - Sodium Channel Blockers
Subclasses, Mechanisms, Indications, Side Effects
la - Quinidine, Procainamide
lb - Lidocaine, Mexiletine
Ic -
Antiarrhythmics - Sodium Channel ... Antiarrhythmics #Sodium #Channel ... #Blockers #ClassI ... #pharmacology #table
Assessment of the Child with Eczema
Distribution of atopic eczema - The distribution of eczema tends to
eczema tends to change ... Causes of exacerbation ... , humidity - Change ... Condition of the ... knowledgeable about condition