Presentation Transcript
ECG Rhythm Interpretation :ECG Rhythm Interpretation Module IECG Basics http://www.medespace.net
Share what you know, learn what you don’t
Course Objectives :Course Objectives To recognize the normal rhythm of the heart - “Normal Sinus Rhythm.”
To recognize the 13 most common rhythm disturbances.
To recognize an acute myocardial infarction on a 12-lead ECG.
Learning Modules :Learning Modules ECG Basics
How to Analyze a Rhythm
Normal Sinus Rhythm
Heart Arrhythmias
Diagnosing a Myocardial Infarction
Advanced 12-Lead Interpretation
Normal Impulse Conduction :Normal Impulse Conduction Sinoatrial node
AV node
Bundle of His
Bundle Branches
Purkinje fibers
Impulse Conduction & the ECG :Impulse Conduction & the ECG Sinoatrial node
AV node
Bundle of His
Bundle Branches
Purkinje fibers
The “PQRST” :The “PQRST” P wave - Atrial depolarization T wave - Ventricular repolarization QRS - Ventricular depolarization
The PR Interval :The PR Interval Atrial depolarization
+
delay in AV junction
(AV node/Bundle of His)
(delay allows time for the atria to contract before the ventricles contract)
Pacemakers of the Heart :Pacemakers of the Heart SA Node - Dominant pacemaker with an intrinsic rate of 60 - 100 beats/minute.
AV Node - Back-up pacemaker with an intrinsic rate of 40 - 60 beats/minute.
Ventricular cells - Back-up pacemaker with an intrinsic rate of 20 - 45 bpm.
The ECG Paper :The ECG Paper Horizontally
One small box - 0.04 s
One large box - 0.20 s
Vertically
One large box - 0.5 mV
The ECG Paper (cont) :The ECG Paper (cont) Every 3 seconds (15 large boxes) is marked by a vertical line.
This helps when calculating the heart rate.
NOTE: the following strips are not marked but all are 6 seconds long. 3 sec 3 sec
End of Module IECG Basics :End of Module IECG Basics Proceed to Module I Practice Quiz on WebCT