583 results
Deep T Wave Inversions - Differential
Normal variants 
  A. Juvenile T wave pattern
Early repolarization ... or ventricular pacing
The JT Interval and Pro-Arrhythmic Risk
Measured from the J-point to the end of the T-wave, the
for ventricular repolarization ... - Ventricular Pacing
Causes of ST Segment Elevation - Differential Diagnosis Framework

STEMI:
 • Upsloping convex STE: "Pardee's sign" +
: - Early-repolarization ... ST Secondary Repolarization ... • Ventricular Pacing ... : - Pacing spike ... Right ventricle pacing
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 ... Myocytes #Phases #Depolarization ... #Repolarization
Temporary / External Pacing
 • Transvenous & epicardial pacing are temporary methods of supporting brady- &
Temporary / External Pacing ... Transvenous & epicardial pacing ... External cardiac pacing ... required to trigger depolarization ... to identify a depolarization
Antiarrhythmics Pharmacology Summary
Cardiac Conduction Phases:
Phase 0 - Ventricular Depolarization:
 • Na+ channels open leading to a
Phase I - Initial Repolarization ... Delays ventricular repolarization ... - Ventricular Repolarization ... prolong AV node repolarization ... prolong AV node repolarization
Action Potential: Depolarization and repolarization of a neuron

#ActionPotential #Depolarization #Repolarization #Neuron #Neurology #Pathophysiology
Action Potential: Depolarization ... and repolarization ... ActionPotential #Depolarization ... #Repolarization
Antiarrhythmics - Vaughan Williams Classification:
CLASS 1 - Sodium Channel Blockers:
 • MOA: Block fast Na+ channels
and magnitude of depolarization ... phase 4 to slow depolarization ... prolong AV node repolarization ... interval (delays time repolarization ... prolong AV node repolarization
Class I Antiarrhythmics and their Key Pharmacologic Properties

Class IA = Quinidine, Procainamide, Disopyramide ("Quarter PounDer")
Class IB
for the rapid depolarization ... • Slows depolarization ... involved in phase 3 repolarization ... • Prolongs repolarization
Major electrocardiogram findings induced by left ventricular hypertrophy (LVH)
An increase in left ventricular mass augments the
alteration in repolarization ... in left atrial depolarization