Bundle Branch Block Quiz Part 2
Identify the following bundle branch blocks.
2.
3.
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4.
5.
6.
7.
Answers
1.
The RSR pattern in V1 suggests a right bundle branch block. Because the QRS complex is less than 0.10 sec this makes it an incomplete right bundle branch block
2.
The monophasic R wave in led I suggests a left bundle branch block. The fast initial R wave reflects the depolarization of the right ventricle while the slow, broad down stroke of the R wave reflects the slow activation of the left ventricle.
3.
The QRS in V1 us wide. Notice the prolongation of the 2nd R wave and the deep S wave that reflect the slower depolarization of the right ventricle.
4.
The QRS complex in V1 is greater than 0.12 sec. The RSR pattern in V1 is characteristic of a right bundle branch block. The initial R wave demonstrates the normal depolarization of the septum while the S wave reflects the depolarization of the left ventricle. The second R wave is indicative of the slower right ventricular activation.
5.
The QRS complex in lead I has a small Q wave with a tall R wave. The initial Q wave may reflect ativation of the septum and right ventricle while monophasic R wave is representative of the slower activation of the left ventricle. The T wave is opposite the terminal direction of the QRS complex.
6.
The left leads in V5 and V6 show wide monophasic R waves with T waves in the opposite direction of the QRS complex
7.
The RSR pattern in the right chest lead of V1 is characteristic of a right bundle branch block. You have a small initial R wave followed by a normal appearing S wave. The impulse then flows from left to right across the left ventricular myocardium to activate the right ventricle. This creates a second R wave with a deep terminal T wave.
1.
.jpg)
5.
Answers
1.
|
| Incomplete right bundle branch block |
The RSR pattern in V1 suggests a right bundle branch block. Because the QRS complex is less than 0.10 sec this makes it an incomplete right bundle branch block
2.
|
| Left bundle branch block |
The monophasic R wave in led I suggests a left bundle branch block. The fast initial R wave reflects the depolarization of the right ventricle while the slow, broad down stroke of the R wave reflects the slow activation of the left ventricle.
3.
 |
| Right bundle branch block |
The QRS in V1 us wide. Notice the prolongation of the 2nd R wave and the deep S wave that reflect the slower depolarization of the right ventricle.
4.
|
| Right bundle branch block |
The QRS complex in V1 is greater than 0.12 sec. The RSR pattern in V1 is characteristic of a right bundle branch block. The initial R wave demonstrates the normal depolarization of the septum while the S wave reflects the depolarization of the left ventricle. The second R wave is indicative of the slower right ventricular activation.
5.
|
| Left bundle branch block |
The QRS complex in lead I has a small Q wave with a tall R wave. The initial Q wave may reflect ativation of the septum and right ventricle while monophasic R wave is representative of the slower activation of the left ventricle. The T wave is opposite the terminal direction of the QRS complex.
6.
|
| Left bundle branch block |
The left leads in V5 and V6 show wide monophasic R waves with T waves in the opposite direction of the QRS complex
7.
|
| Right bundle branch block |
The RSR pattern in the right chest lead of V1 is characteristic of a right bundle branch block. You have a small initial R wave followed by a normal appearing S wave. The impulse then flows from left to right across the left ventricular myocardium to activate the right ventricle. This creates a second R wave with a deep terminal T wave.
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