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Step 5 – QRS Complex - Course # 318-7
Description
- The QRS represents ventricular depolarization.
- It is very important to analyze each QRS complex on the tracing and report the duration measurement and describe the shape (including any changes in shape).
- As discussed earlier in step 3, when referring to P waves, remember changes in the shape of the waveform can indicate the locus of stimulation has changed or a different conduction pathway was followed. It is no different when analyzing the QRS complex.
- The difference is that in step 3, we were looking at atrial activity. Now we are looking at ventricular activity.
- Measure from the beginning to the end of ventricular depolarization.
Description 2
- The normal duration of the QRS complex measures from: 0.06 – 0.10 second
- When the QRS measurement is 0.12 seconds or greater it indicates a delay in the electrical impulse as it is passing through the ventricular conduction system
- Abnormal duration QRS
How to use this module.
This module is organized into a series of lessons. These lessons are listed on the right side of the content area. To navigate to a lesson, either
click on the lesson name or use the arrows at the bottom right. Each lesson contains several slides. These slides are lists with tabs
that appear above each slide. To navigate to a slide, either click on the tab or use the gray arrows that appear on the left and right sides of the slides.
Within the lesson are questions. These questions are used to reinforce key concepts, but they are not used for scoring or grading. After
completing this module, we encourage you to use our drills and quizzes to practice what you have learned. Finally, after completing most or all of
the modules, you might try our EKG Graded Quizzes to test your knowledge.
Our affiliated website, Practical Clinical Skills, provides additional drills and quizzes with certifcates of achievement. If you have an account, then your signin name and password will
work on that website as well. Click here for EKG contents and apps at Practical Clinical Skills.
318 Step 5 – QRS Complex - Course # 318-7