847 results
Class I Antiarrhythmics and their Key Pharmacologic Properties

Class IA = Quinidine, Procainamide, Disopyramide ("Quarter PounDer")
Class IB
in wide QRS on EKG ... involved in phase 3 repolarization ... • Prolongs repolarization ... prolonged QT on EKG ... Pharmacology #Agents #Cardiology
Antiarrhythmics Pharmacology Summary
Cardiac Conduction Phases:
Phase 0 - Ventricular Depolarization:
 • Na+ channels open leading to a
prolong AV node repolarization ... prolong AV node repolarization ... inotropy) ACCP Cardiology ... Classification #Classes ... pathophysiology #phases #cardiology
Distinguishing Between Benign Early repolarization vs STEMI on EKG
#Diagnosis #Cardiology #ECG #EKG #Repolarization #STEMI #Comparison #Table
Between Benign Early repolarization ... vs STEMI on EKG ... #Diagnosis #Cardiology ... #ECG #EKG #Repolarization
Antiarrhythmics - Vaughan Williams Classification:
CLASS 1 - Sodium Channel Blockers:
 • MOA: Block fast Na+ channels
prolong AV node repolarization ... prolong AV node repolarization ... inotropy) ACCP Cardiology ... Classification #Classes ... pathophysiology #cardiology
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 ... #Hyperkalemia #EKG
Major electrocardiogram findings induced by left ventricular hypertrophy (LVH)
An increase in left ventricular mass augments the
alteration in repolarization ... in left atrial depolarization ... LeftVentricular #ECG ... #EKG #Diagnosis ... #Cardiology #Electrocardiogram
Hypercalcemia - EKG Findings
Causes of Hypercalcemia 
• Malignancy 
• Milk-alkali syndrome 
• Vitamin D toxicity 
•
Hypercalcemia - EKG ... Findings Causes ... Hypercalcemia #EKG ... #Differential #Causes ... #Diagnosis #Cardiology
T Waves: Benign Early Repolarization vs Hyperacute T Waves vs Peaked T Waves 

BER = Notching
: Benign Early Repolarization ... symmetrically peaked #ECG ... #EKG #cardiology
ECG characteristics of early repolarization
 - The ST segment elevations are concave and most pronounced in
of early repolarization ... In case of chest ... #Diagnosis #Cardiology ... #EKG #ECG #Early ... #Repolarization
Antiarrhythmics - Vaughan Williams Classification
Class I (Ia, Ib, Ic) - Na+ Channel Blockade
 • Slows depolarization
Classification Class ... Blockade • Slows depolarization ... Blockade • Slows depolarization ... Classification #Classes ... #cardiology #pharmacology