11 results
Type 1 Second-degree AV block, also known as Mobitz I or Wenckebach periodicity, is almost always
Second-degree AV ... block, also known ... disease of the AV ... node.Mobitz I heart block ... #Clinical #EM #IM
Type 1 Second-degree AV block, also known as Mobitz I or Wenckebach periodicity, is almost always
Second-degree AV ... block, also known ... disease of the AV ... node.Mobitz I heart block ... #Clinical #EM #IM
Pacemaker Placement Indications
Class I:
 • Third degree block
 • Advanced 2nd degree block
 • Symptomatic Mobitz
I or II • Mobitz ... Class II: • Mobitz ... • First degree AV ... • Reversible causes ... of AV block -
Atrioventricular Blocks (AV blocks) - ECG Diagnosis Summary
First Degree AV Block
 • The P wave is
Mobitz I / Wenckebach ... aka Mobitz II) ... • This is a clinically ... concerning variant of Mobitz ... electrocardiogram #classification
Antiarrhythmics - Vaughan Williams Classification:
CLASS 1 - Sodium Channel Blockers:
 • MOA: Block fast Na+ channels
Vaughan Williams Classification ... causing ↓SA node and AV ... interval to prolong AV ... #Pharmacology #Classification ... #Classes #pathophysiology
Shock - Differential Diagnosis by Classification
Reflex Syncope 
 - Vasovagal syncope
   • Prolonged standing
Differential Diagnosis by Classification ... bradycardia • Sinus pauses ... • AV block ... Differential #Diagnosis #Classification ... #Table #Causes
Antiarrhythmics Pharmacology Summary
Cardiac Conduction Phases:
Phase 0 - Ventricular Depolarization:
 • Na+ channels open leading to a
Vaughan Williams Classification ... causing ↓SA node and AV ... interval to prolong AV ... #Pharmacology #Classification ... #Classes #pathophysiology
Arrhythmias - Differential Diagnosis Algorithm

Bradyarrhythmia (<60 bpm)
 • Sinus Bradycardia
 • Sick Sinus Syndrome
 • SA
Differential Diagnosis Algorithm ... • AV Block (ISt ... with Variable AV ... Differential #Diagnosis #Algorithm ... #causes
Bradycardia Diagnostic and Management Algorithm

CONSIDER ETIOLOGY (not inclusive): 
 - STRUCTURAL: sick sinus, AV block, ischemia,
and Management Algorithm ... STRUCTURAL: sick sinus, AV ... block, ischemia ... LIFE THREATENING CAUSES ... #Bradycardia #Algorithm
Syncope - Differential Diagnosis Algorithm
Neurocardiogenic:
 • Vasovagal
 • Orthostatic Hypotension
 • Autonomic Neuropathy
 • Situational (micturition,
Differential Diagnosis Algorithm ... 2nd/3rd degree AV ... Block • Pacemaker ... Differential #Diagnosis #Algorithm ... #causes