2612 results
Antiarrhythmics Pharmacology Summary
Cardiac Conduction Phases:
Phase 0 - Ventricular Depolarization:
 • Na+ channels open leading to a
Classification: CLASS ... duration - CLASS ... duration - CLASS ... interval (delays time repolarization ... #pathophysiology
Antiarrhythmics - Vaughan Williams Classification:
CLASS 1 - Sodium Channel Blockers:
 • MOA: Block fast Na+ channels
Classification: CLASS ... prolong AV node repolarization ... interval (delays time repolarization ... prolong AV node repolarization ... #pathophysiology
Action potential in cardiomyocytes
The action potential in typical cardiomyocytes is composed of 5 phases (0-4), beginning
phase Phase 0: Depolarization ... Phase 1: Early repolarization ... phase Phase 3: Repolarization ... #Pathophysiology ... #Repolarization
Action Potential: Depolarization and repolarization of a neuron

#ActionPotential #Depolarization #Repolarization #Neuron #Neurology #Pathophysiology
Action Potential: Depolarization ... and repolarization ... ActionPotential #Depolarization ... #Repolarization ... Neuron #Neurology #Pathophysiology
Class I Antiarrhythmics and their Key Pharmacologic Properties

Class IA = Quinidine, Procainamide, Disopyramide ("Quarter PounDer")
Class IB
Class I Antiarrhythmics ... Properties Class ... Mayo, Pickle") Class ... involved in phase 3 repolarization ... • Prolongs repolarization
Antiarrhythmics - Vaughan Williams Classification
Class I (Ia, Ib, Ic) - Na+ Channel Blockade
 • Slows depolarization
Classification Class ... Blockade • Slows depolarization ... Widens QRS complex Class ... Blockade • Slows depolarization ... Blockade • Slows depolarization
Major electrocardiogram findings induced by left ventricular hypertrophy (LVH)
An increase in left ventricular mass augments the
alteration in repolarization ... in left atrial depolarization
Hyperkalemia shortens repolarization; changes in the T wave provide the earliest clues to hyperpotassemia.
 - At
Hyperkalemia shortens repolarization ... 6.0 mEq/L, rapid repolarization ... causes peaked T ... in conduction causes ... wave to produce classic
Distinguishing Between Benign Early repolarization vs STEMI on EKG
#Diagnosis #Cardiology #ECG #EKG #Repolarization #STEMI #Comparison #Table
Between Benign Early repolarization ... Cardiology #ECG #EKG #Repolarization
ECG characteristics of early repolarization
 - The ST segment elevations are concave and most pronounced in
characteristics of early repolarization ... hallmark of early repolarization ... EKG #ECG #Early #Repolarization