A&P II Lab review Circulatory system (Part 2)

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1

Intercalated discs in the heart muscle cause what?

The cells to contract together at the same time.

2

Heart muscle cells have how many nucleus?

single

3

What is unique about the cells into the heart muscle?

They branch

4

The heart muscle cells are ___________.

Striated

5

What node initiate heart beat and determines heart rate?

The SA Node

6

Why is the electrical system in the heart unique?

It makes the heart beat with out the help of the CNS

7

Give the electrical pathway of the heart, starting with the SA node.

SA Node

AV Node

AV Bundle (Bundle of His)

R & L bundle branches

Purkinje fibers

8

What do EKG's show us?

Electrical activities of the heart

9

What do EKG's not show us?

Muscle contraction

10

In an EKG reading, what does the P wave show?

Atrial depolorization

11

In an EKG reading, what does the QRS wave show?

Atrial repolarization masked by vent depolarization

12

In an EKG reading, what does the T wave show?

Ventricular repolarization

13

If the heart beats above 100 for prolonged periods of time it is known as what?

Tachycardia

14

If the heart beats below 60 bpm for prolonged periods of time it is known as what?

Bradycardia

15

At what point would you use paddles as indicated by an EKG?

V. Fib

16
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Identify A

P wave

17
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Identify B

Q wave

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Identify C

R wave

19
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Identify D

S wave

20
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Identify E

T wave

21
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Identify F

PR interval

22
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Identify G

PR Segment

23
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Identify H

QRS complex

24
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Identify I

ST segment

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Identify J

QT Interval

26
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What would the diagnosis be for this pt.?

V. Fib

27
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What would the diagnosis be for this pt?

Sinus Arrhythmia