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Heart Blocks
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Second Degree Heart Block Type II
Description
The hallmark of this dysrhythmia is a constant P-R interval with missing QRS complexes.
This dysrhythmia may present in a couple of different ways.
A. QRS complexes occurring in a specific pattern in a ratio with the P waves. This is often referred to as 2:1 or 3:1 block depending upon the ratio of P waves to each QRS complex.
B. QRS complexes occur in a more unstable, unpredictable manner.
Either presentation requires immediate reporting due to its potential for conversion to Third Degree (Complete) Heart Block.
A.
B.
Practice Strip
Analyze this tracing using the five steps of rhythm analysis.
Compare your answers with the answers on the next slide.
Answers
Rhythm: Atria and Ventricles - Regular
Rate: Atria – 125, Ventricles - 41
P Wave: Upright
PR interval: 0.14 sec
QRS: 0.06
Interpretation: Second Degree Heart Block Type II, 3:1
Practice Strip #2
Analyze this tracing using the five steps of rhythm analysis.
Compare your answers with the answers on the next slide.
Answers #2
Rhythm: A – Regular, V - Irregular
Rate: Atria – 68, Ventricles - 40
P Wave: Upright
PR interval: 0.16 sec
QRS: 0.08
Interpretation: Second Degree Heart Block Type II
Lessons
Overview
Rhythm Analysis
Heart Block Dysrhythmias
First Degree Heart Block
Second Degree Heart Block Type I
Second Degree Heart Block Type II
Third Degree Heart Block
Test Questions 1-4
Test Questions 5-9
Test Questions 10-11
Test Questions 12-14
Test Questions 15-18
Test Questions 19-22
EKG Self Test
Next Lesson »
Description
The hallmark of this dysrhythmia is a constant P-R interval with missing QRS complexes.
This dysrhythmia may present in a couple of different ways.
A. QRS complexes occurring in a specific pattern in a ratio with the P waves. This is often referred to as 2:1 or 3:1 block depending upon the ratio of P waves to each QRS complex.
B. QRS complexes occur in a more unstable, unpredictable manner.
Either presentation requires immediate reporting due to its potential for conversion to Third Degree (Complete) Heart Block.
A.
B.
Practice Strip
Analyze this tracing using the five steps of rhythm analysis.
Compare your answers with the answers on the next slide.
Answers
Rhythm: Atria and Ventricles - Regular
Rate: Atria – 125, Ventricles - 41
P Wave: Upright
PR interval: 0.14 sec
QRS: 0.06
Interpretation: Second Degree Heart Block Type II, 3:1
Practice Strip #2
Analyze this tracing using the five steps of rhythm analysis.
Compare your answers with the answers on the next slide.
Answers #2
Rhythm: A – Regular, V - Irregular
Rate: Atria – 68, Ventricles - 40
P Wave: Upright
PR interval: 0.16 sec
QRS: 0.08
Interpretation: Second Degree Heart Block Type II
Next Lesson »
Table of Contents
Overview
Rhythm Analysis
Heart Block Dysrhythmias
First Degree Heart Block
Second Degree Heart Block Type I
Second Degree Heart Block Type II
Third Degree Heart Block
Test Questions 1-4
Test Questions 5-9
Test Questions 10-11
Test Questions 12-14
Test Questions 15-18
Test Questions 19-22
EKG Self Test