This video explains the foundation of electrophysiology, action potential, polarization, depolarization, and repolarization. It further relates the four properties of cardiac pacemaker cells and applies them to the conduction system of the heart. The relationship of cardiac output to heart rate, stroke volume, preload, afterload and contractility is delineated. It further covers the intrinsic heart rates of different parts of the conduction system in the SA & AV nodes and Purkinje fibers. PQRST waves are explained and related to action potential.
The content of this video is intended to serve as the foundation for the interpretation of EKG dysrhythmias.
For more content on EKG basics - EKG paper, EKG basics - Normal intervals and Rules to Memorize, Sinus rhythms, Atrial rhythms, AV blocks, and Ventricular rhythms please refer to the EKG interpretation playlist of my channel Nursing School Explained.
EKG INTERPRETATION - THE BASICS:
1. Basic Electrophysiology - a foundation for EKG Interpretation • Basic Electrophysiolog...
2. EKG Interpretation - The Basics: EKG paper and Determination of Heart Rate • EKG Interpretation - T...
3. The Basics - Normal intervals and RULES to memorize • EKG Interpretation - T...
SINUS RHYTHMS
• SINUS RHYTHMS
ATRIAL RHYTHMS
1. Premature Atrial Contractions (PACs) • Premature Atrial Contr...
2. Atrial Flutter • Atrial Flutter
3. Atrial Fibrillation • Atrial Fibrillation
4. Supraventricular Tachycardia (SVT) • Supraventricular Tachy...
ATRIOVENTRICULAR RHYTHMS
1. First degree Atrioventricular (AV) Block • First Degree AV (Heart...
2. Second degree Atrioventricular (AV) Block (aka Mobitz Type I or Wenckebach) • Second Degree AV (Hear...
3. Second degree Atrioventricular (AV) Block (aka Mobitz Type II or Classical Heart block) • Second Degree AV (Hear...
4. Third degree Atrioventricular (AV) Block or Complete Heart Block • Third Degree/Complete ...
VENTRICULAR RHYTHMS
1. Premature Ventricular Complexes/Contractions (PVCs) • Premature Ventricular ...
2. Ventricular Tachycardia (Vtach) • Ventricular Tachycardi...
3. Ventricular Fibrillation (VFib) • Ventricular Fibrillati...
4. Pulseless Electrical Activity (PEA) • Pulseless Electrical A...
5. Asystole (aka ventricular standstill) • Asystole (aka ventricu...