1104 results
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
Antiarrhythmics Pharmacology Summary
Cardiac Conduction Phases:
Phase 0 - Ventricular Depolarization:
 • Na+ channels open leading to a
Action, ↑ EFR & AP ... Action, ↓ EFR & AP ... phase 2 (↑ERP & ↑AP ... interval (delays time repolarization ... prolong AV node repolarization
Antiarrhythmics - Vaughan Williams Classification:
CLASS 1 - Sodium Channel Blockers:
 • MOA: Block fast Na+ channels
Action, ↑ EFR & AP ... Action, ↓ EFR & AP ... prolong AV node repolarization ... interval (delays time repolarization ... prolong AV node repolarization
Differential Diagnosis for ST Segment Elevations
 - ACUTE STEMI 
 - PULMONARY EMBOLISM 
 - LBBB
EMBOLISM - LBBB (PACEMAKER ... - BENIGN EARLY REPOLARIZATION
WAP - Wandering Atrial Pacemaker #Clinical #Cardiology #MedStudent #EKG #WAP #WanderingAtrialPacemaker #ECGEducator
WAP - Wandering ... Atrial Pacemaker ... MedStudent #EKG #WAP
Action Potential: Depolarization and repolarization of a neuron

#ActionPotential #Depolarization #Repolarization #Neuron #Neurology #Pathophysiology
Action Potential: Depolarization ... and repolarization ... ActionPotential #Depolarization ... #Repolarization
Comparison between Wandering atrial pacemaker (A) vs multifocal atrial arrhythmia (B)

#WAP #MAR #wandering #atrial #pacemaker #comparison
Wandering atrial pacemaker ... arrhythmia (B) #WAP ... wandering #atrial #pacemaker
Pacemaker Operating Modes
1 - Chamber paced
     A (atrium), V (ventricle), D (dual/both)
2
Pacemaker Operating ... period of time the pacemaker ... would trigger pacemaker-mediated ... The voltage the pacemaker ... EricsMedicalLectures/featured #Pacemaker
Temporary / External Pacing
 • Transvenous & epicardial pacing are temporary methods of supporting brady- &
permanent implanted pacemaker ... required to trigger depolarization ... to identify a depolarization ... MD @nickmmark #pacemaker
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