ECG Test 8-22-15 Word Scramble
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Question | Answer |
What does intraventricular mean? | Within the ventricle |
The left main bundle branch of the heart is divided into what? | Two fascicles, and anterior fascicle and a posterior fascicle |
How does normal depolarisation occur in the right bundle branch and left bundle branch? | Electrical impulses travel through the right bundle branch and left bundle branch and fascicles at the same time causing simultaneous depolarization of the right and left ventricles |
What is a normal QRS duration? | .10 seconds or less |
What happens to an electrical impulse when one bundle branch is blocked? | The electrical impulse travel down the intact bundle depolarizing that ventricle first and then the impulse progresses through the interventricular septum to depolarize the other ventricle |
What is depolarization of one truck ventricle before the other called? | Sequential depolarization |
What is a result of sequential depolarization? | Depolarization of the ventricles is delayed, resulting in a wide QRS complex of .12 second or greater |
Which bundle branch block is most common? | Right bundle branch block or RBBB |
What population is left bundle branch block most commonly seen in? | Elderly individuals with diseased hearts |
What is the most common cause of left bundle branch block? | Hypertensive heart disease |
What treatment is indicated for bundle branch block? | Specific treatment is usually not indicated for bundle branch block |
What does knocking in the QRS signify? | BBB bundle branch block |
How do you determine if BBB is LBBB or RBBB? | Look at v1 through v6 to make a determination |
List five criteria for complete LBBB | Wide QRS; notched R waves in V4 V5 V6; wide slurred S in v1 v2 v3; secondary ST/T wave changes, could get left axis deviation |
Five criteria for Right Bundle Branch Block | |
Which leads are the right precordial leads? | V1, v2, v3 |
Which leads are the left precordial leads? | V 4, v5, v6, v7 |
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