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Summary of Heart Blocks
1st Degree Heart Block:
 • Prolonged PR >200ms (5 small squares).
 • Narrow
Heart Block: ... I Heart Block ( ... Complete Heart Block ... • Block in AV ... narrow QRS • Block
Atrioventricular Blocks (AV blocks) - ECG Diagnosis Summary
First Degree AV Block
 • The P wave is
First Degree AV Block ... bundle branch block ... Second Degree AV Block ... High-grade AV Block ... high-grade AV block
Antiarrhythmics - Vaughan Williams Classification:
CLASS 1 - Sodium Channel Blockers:
 • MOA: Block fast Na+ channels
: • MOA: Block ... 2 - Beta Blockers ... : • MOA: Block ... primarily) and block ... : • MOA: Block
Pacemaker Placement Indications
Class I:
 • Third degree block
 • Advanced 2nd degree block
 • Symptomatic Mobitz
• Third degree block ... Advanced 2nd degree block ... or 3rd degree block ... Tri-fascicular block ... of AV block -
ECG Basics - Heart Blocks #Diagnosis #Cardiology #MedStudent #EKG #Basics #HeartBlock #Table #AVBlock #Mobitz #Degree #Wenckebach
Basics - Heart Blocks ... Basics #HeartBlock #Table ... #AVBlock #Mobitz
ECG Basics - Heart Blocks #Diagnosis #Cardiology #MedStudent #EKG #Basics #HeartBlock #Table #AVBlock #Mobitz #Degree #Wenckebach
Basics - Heart Blocks ... Basics #HeartBlock #Table ... #AVBlock #Mobitz
Bradycardia Diagnostic and Management Algorithm

CONSIDER ETIOLOGY (not inclusive): 
 - STRUCTURAL: sick sinus, AV block, ischemia,
sick sinus, AV block ... Hypothyroidism - TOX: beta-blockers ... calcium channel blockers ... TREATMENT - Drugs (beta-blockers ... calcium channel blockers
Antiarrhythmic Medications - Vaughan Williams Classification - Summary Table
Class I agents - Sodium Channel Blockers⠀
Class II
- Summary Table ... Sodium Channel Blockers ... are beta blockers ... Calcium Channels Blockers ... #Summary #Table
Mobitz Type I (Wenckebach Phenomenon) 2nd Degree AV Block on EKG
 • P-R interval gradually increases
Mobitz Type I (Wenckebach ... 2nd Degree AV Block ... till a dropped beat ... Visualmedapp #Mobitz ... Second #Degree #AV #Block
Antiarrhythmics Pharmacology Summary
Cardiac Conduction Phases:
Phase 0 - Ventricular Depolarization:
 • Na+ channels open leading to a
: • MOA: Block ... 2 - Beta Blockers ... : • MOA: Block ... primarily) and block ... : • MOA: Block