ecg rhythm interpretation module iv c av junctional blocks medical ppt medical ppt
TRANSCRIPT
![Page 1: ECG Rhythm Interpretation Module IV c AV Junctional Blocks Medical ppt Medical ppt](https://reader033.vdocument.in/reader033/viewer/2022061613/551aee725503465e7d8b4df6/html5/thumbnails/1.jpg)
ECG Rhythm Interpretation
Module IV c
AV Junctional Blocks
Medical pptMedical ppt http://hastaneciyiz.blogspot.com
![Page 2: ECG Rhythm Interpretation Module IV c AV Junctional Blocks Medical ppt Medical ppt](https://reader033.vdocument.in/reader033/viewer/2022061613/551aee725503465e7d8b4df6/html5/thumbnails/2.jpg)
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.
![Page 3: ECG Rhythm Interpretation Module IV c AV Junctional Blocks Medical ppt Medical ppt](https://reader033.vdocument.in/reader033/viewer/2022061613/551aee725503465e7d8b4df6/html5/thumbnails/3.jpg)
Learning Modules
• ECG Basics
• How to Analyze a Rhythm
• Normal Sinus Rhythm
• Heart Arrhythmias
• Diagnosing a Myocardial Infarction
• Advanced 12-Lead Interpretation
![Page 4: ECG Rhythm Interpretation Module IV c AV Junctional Blocks Medical ppt Medical ppt](https://reader033.vdocument.in/reader033/viewer/2022061613/551aee725503465e7d8b4df6/html5/thumbnails/4.jpg)
Arrhythmias
• Sinus Rhythms
• Premature Beats
• Supraventricular Arrhythmias
• Ventricular Arrhythmias
• AV Junctional Blocks
![Page 5: ECG Rhythm Interpretation Module IV c AV Junctional Blocks Medical ppt Medical ppt](https://reader033.vdocument.in/reader033/viewer/2022061613/551aee725503465e7d8b4df6/html5/thumbnails/5.jpg)
AV Nodal Blocks
• 1st Degree AV Block
• 2nd Degree AV Block, Type I
• 2nd Degree AV Block, Type II
• 3rd Degree AV Block
![Page 6: ECG Rhythm Interpretation Module IV c AV Junctional Blocks Medical ppt Medical ppt](https://reader033.vdocument.in/reader033/viewer/2022061613/551aee725503465e7d8b4df6/html5/thumbnails/6.jpg)
Rhythm #10
60 bpm• Rate?• Regularity? regular
normal
0.08 s
• P waves?
• PR interval? 0.36 s• QRS duration?
Interpretation? 1st Degree AV Block
![Page 7: ECG Rhythm Interpretation Module IV c AV Junctional Blocks Medical ppt Medical ppt](https://reader033.vdocument.in/reader033/viewer/2022061613/551aee725503465e7d8b4df6/html5/thumbnails/7.jpg)
1st Degree AV Block
• Deviation from NSR– PR Interval > 0.20 s
![Page 8: ECG Rhythm Interpretation Module IV c AV Junctional Blocks Medical ppt Medical ppt](https://reader033.vdocument.in/reader033/viewer/2022061613/551aee725503465e7d8b4df6/html5/thumbnails/8.jpg)
1st Degree AV Block
• Etiology: Prolonged conduction delay in the AV node or Bundle of His.
![Page 9: ECG Rhythm Interpretation Module IV c AV Junctional Blocks Medical ppt Medical ppt](https://reader033.vdocument.in/reader033/viewer/2022061613/551aee725503465e7d8b4df6/html5/thumbnails/9.jpg)
Rhythm #11
50 bpm• Rate?• Regularity? regularly irregular
nl, but 4th no QRS
0.08 s
• P waves?
• PR interval? lengthens• QRS duration?
Interpretation? 2nd Degree AV Block, Type I
![Page 10: ECG Rhythm Interpretation Module IV c AV Junctional Blocks Medical ppt Medical ppt](https://reader033.vdocument.in/reader033/viewer/2022061613/551aee725503465e7d8b4df6/html5/thumbnails/10.jpg)
2nd Degree AV Block, Type I
• Deviation from NSR– PR interval progressively lengthens,
then the impulse is completely blocked (P wave not followed by QRS).
![Page 11: ECG Rhythm Interpretation Module IV c AV Junctional Blocks Medical ppt Medical ppt](https://reader033.vdocument.in/reader033/viewer/2022061613/551aee725503465e7d8b4df6/html5/thumbnails/11.jpg)
2nd Degree AV Block, Type I
• Etiology: Each successive atrial impulse encounters a longer and longer delay in the AV node until one impulse (usually the 3rd or 4th) fails to make it through the AV node.
![Page 12: ECG Rhythm Interpretation Module IV c AV Junctional Blocks Medical ppt Medical ppt](https://reader033.vdocument.in/reader033/viewer/2022061613/551aee725503465e7d8b4df6/html5/thumbnails/12.jpg)
Rhythm #12
40 bpm• Rate?• Regularity? regular
nl, 2 of 3 no QRS
0.08 s
• P waves?
• PR interval? 0.14 s• QRS duration?
Interpretation? 2nd Degree AV Block, Type II
![Page 13: ECG Rhythm Interpretation Module IV c AV Junctional Blocks Medical ppt Medical ppt](https://reader033.vdocument.in/reader033/viewer/2022061613/551aee725503465e7d8b4df6/html5/thumbnails/13.jpg)
2nd Degree AV Block, Type II
• Deviation from NSR– Occasional P waves are completely
blocked (P wave not followed by QRS).
![Page 14: ECG Rhythm Interpretation Module IV c AV Junctional Blocks Medical ppt Medical ppt](https://reader033.vdocument.in/reader033/viewer/2022061613/551aee725503465e7d8b4df6/html5/thumbnails/14.jpg)
2nd Degree AV Block, Type II
• Etiology: Conduction is all or nothing (no prolongation of PR interval); typically block occurs in the Bundle of His.
![Page 15: ECG Rhythm Interpretation Module IV c AV Junctional Blocks Medical ppt Medical ppt](https://reader033.vdocument.in/reader033/viewer/2022061613/551aee725503465e7d8b4df6/html5/thumbnails/15.jpg)
Rhythm #13
40 bpm• Rate?• Regularity? regular
no relation to QRS
wide (> 0.12 s)
• P waves?
• PR interval? none• QRS duration?
Interpretation? 3rd Degree AV Block
![Page 16: ECG Rhythm Interpretation Module IV c AV Junctional Blocks Medical ppt Medical ppt](https://reader033.vdocument.in/reader033/viewer/2022061613/551aee725503465e7d8b4df6/html5/thumbnails/16.jpg)
3rd Degree AV Block
• Deviation from NSR– The P waves are completely blocked in
the AV junction; QRS complexes originate independently from below the junction.
![Page 17: ECG Rhythm Interpretation Module IV c AV Junctional Blocks Medical ppt Medical ppt](https://reader033.vdocument.in/reader033/viewer/2022061613/551aee725503465e7d8b4df6/html5/thumbnails/17.jpg)
3rd Degree AV Block
• Etiology: There is complete block of conduction in the AV junction, so the atria and ventricles form impulses independently of each other. Without impulses from the atria, the ventricles own intrinsic pacemaker kicks in at around 30 - 45 beats/minute.
![Page 18: ECG Rhythm Interpretation Module IV c AV Junctional Blocks Medical ppt Medical ppt](https://reader033.vdocument.in/reader033/viewer/2022061613/551aee725503465e7d8b4df6/html5/thumbnails/18.jpg)
Remember• When an impulse originates in a ventricle,
conduction through the ventricles will be inefficient and the QRS will be wide and bizarre.
![Page 19: ECG Rhythm Interpretation Module IV c AV Junctional Blocks Medical ppt Medical ppt](https://reader033.vdocument.in/reader033/viewer/2022061613/551aee725503465e7d8b4df6/html5/thumbnails/19.jpg)
End of Module IV c
AV Junctional Blocks
Proceed to Module IV c Practice Quiz on WebCT
Medical pptMedical ppt http://hastaneciyiz.blogspot.com