Quiz 3 - The QRS Complex and Axis Flashcards Preview

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Flashcards in Quiz 3 - The QRS Complex and Axis Deck (7)
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1

What does the QRS complex represent?

Ventricular Depolarization

2

The QRS complex is is the visual summation of what?

Ventricular Vectors

3

Order of Ventricular Depolarization on a Physiologic Level:

1. Septum (from left to right)
2. Main portion of ventricle (largest vector)
3. Basilar/Bottom Portion of Ventricle

4

What affects the amplitude of the QRS complex?

The size and direction of vectors in relation to the leads

5

In a hypertrophic ventricle, what would happen to the QRS amplitude and why?

Higher Amplitude!

Because there is more muscle to conduct through, therefore more vectors are present.

6

In an infarcted tissue in the ventricle, what would happen to the QRS amplitude and why?

Unopposed wave on the EKG

Because conduction will not pass through the scar tissue.

7

If there is fluid and fat in the heart, what would happen to the QRS amplitude and why?

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