1. 1. Sinoatrial node 2. Atrialventricular node 3. Bundle of His
4. Left bundle branch
5. left posterior fascicle
6. left-anterior fascicle 7. Left ventricle
8. Ventricular septumm
9. Right ventricle
10. Right bundle branch
Blockage 1
1. Sinoatrial node 2. Atrioventricular node 3. Bundle of His 4. Left bundle branch 5. left posterior fascicle 3 10 4

2. 1. Sinoatrial node 2. Atrialventricular node 3. Bundle of His
4. Left bundle branch
5. left posterior fascicle
6. left-anterior fascicle 7. Left ventricle
8. Ventricular septumm
9. Right ventricle
10. Right bundle branch
Blockage 6
1. Sinoatrial node 2. Atrioventricular node 3. Bundle of His 4. Left bundle branch 5. left posterior fascicle 5

3. Normal ECG

4. 1. Sinoatrial node 2. Atrioventricular node 3. Bundle of His 4
1. Sinoatrial node 2. Atrioventricular node 3. Bundle of His 4. Left bundle branch 5. left posterior fascicle