ECG Rhythm Interpretation
Module I
ECG Basics
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ECG Rhythm Interpretation: Understanding Normal Heart Rhythms and Common Disturbances, Slides of Cardiology
A part of an online course on ecg rhythm interpretation offered by docsity.com. It covers the basics of ecg, impulse conduction, the pqrst complex, the pr interval, and pacemakers of the heart. The course objectives include recognizing the normal rhythm of the heart, common rhythm disturbances, and diagnosing a myocardial infarction.
Typology: Slides
2011/2012
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ECG Rhythm Interpretation
Module I
ECG Basics
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.
Normal Impulse Conduction
Sinoatrial node
AV node
Bundle of His
Bundle Branches
Purkinje fibers
Impulse Conduction & the ECG
Sinoatrial node
AV node
Bundle of His
Bundle Branches
Purkinje fibers
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) Docsity.com
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 (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