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Antiarrhythmic Medications - Vaughan Williams Classification - Summary Table
Class I agents - Sodium Channel Blockers⠀
Class II
Antiarrhythmic Medications ... Vaughan Williams Classification ... are beta blockers ... EricsMedicalLectures/ #Antiarrhythmic ... #Medications #Classification
Antiarrhythmics - Vaughan Williams Classification:
CLASS 1 - Sodium Channel Blockers:
 • MOA: Block fast Na+ channels
Antiarrhythmics ... Vaughan Williams Classification ... 2 - Beta Blockers ... alpha & beta adrenergic ... #Classes #pathophysiology
Antiarrhythmics Pharmacology Summary
Cardiac Conduction Phases:
Phase 0 - Ventricular Depolarization:
 • Na+ channels open leading to a
Antiarrhythmics ... Vaughan Williams Classification ... 2 - Beta Blockers ... alpha & beta adrenergic ... #Classes #pathophysiology
The Diagnostic Approach to Hyperkalemia
Drugs
 - Amiloride
 - Spironolactone
 - Triamterene
 - Trimethoprim
 - Pentamidine
 -
inhibitors Other causes ... transplant - SLE High ... - NSAlDs - Beta-Blockers ... #Hyperkalemia #Algorithm ... #differential #causes
Lymphomas and Lymphoproliferative Disorders - Differential Diagnosis Algorithm
Hodgkin Lymphoma ~40% - Characteristic For Reed-Sternberg (RS) Cells
Differential Diagnosis Algorithm ... are present • Classic ... age range • High ... Lymphoproliferative #Disorders #Classification ... #pathophysiology
Causes of Hyperkalemia - Reduced Excretion - Differential Diagnosis Algorithm

Reduced flow through distal nephron - TTKG
Differential Diagnosis Algorithm ... • ENaC blockers ... nephropathy • Beta ... Differential #Diagnosis #Algorithm ... #Causes
Causes of Hyperkalemia
l. Pseudohyperkalemia
  A Cellular efflux; thrombocytosis, erythrocytosis, leukocytosis, in vitro hemolysis
  B.
Causes of Hyperkalemia ... Beta-Adrenergic ... Differential #Diagnosis #High ... #Potassium #Classification ... #Causes
Diagnosis and Management of Achalasia - ACG Guidelines

Who to suspect?
 • Patients presenting with progressive dysphagia
barium or the classic ... bird beaking" • High ... (HRM) Chicago classification ... Calcium channel blockers ... Anticholinergics, Beta-adrenergic