247 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
Phase I - Initial Repolarization ... - Ventricular Repolarization ... prolong AV node repolarization ... interval (delays time 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
Pacemaker Operating Modes
1 - Chamber paced
     A (atrium), V (ventricle), D (dual/both)
2
Delay (150-200 bpm ... or paced atrial depolarization ... after ventricular depolarization ... to an intrinsic depolarization ... #Pacemaker #PPM
Major electrocardiogram findings induced by left ventricular hypertrophy (LVH)
An increase in left ventricular mass augments the
alteration in repolarization ... in left atrial depolarization
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
Temporary / External Pacing
 • Transvenous & epicardial pacing are temporary methods of supporting brady- &
required to trigger depolarization ... to identify a depolarization ... nickmmark #pacemaker #PPM
Antiarrhythmics - Vaughan Williams Classification
Class I (Ia, Ib, Ic) - Na+ Channel Blockade
 • Slows depolarization
Blockade • Slows depolarization ... Blockade • Slows depolarization ... Blockade • Slows depolarization