Physiology I Final lab.csv Flashcards Preview

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Flashcards in Physiology I Final lab.csv Deck (84)
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1

What does S1 represent?

closure of the AV valve

2

What does S2 represent?

closure of the semi-lunar valves

3

When does S1 begin?

at onset of ventricular systole

4

What combined noises do you hear?

mitral (bicuspid) and tricuspid valves. Lub

5

When does S2 begin?

onset of ventricular diastole.

6

What combined noises do you hear?

aortic and pulmonary semilunar outflow valves. сdubо

7

What is S3?

sometimes heard during ventricular filling

8

What is S4?

sometimes heard during atrial ejection

9

Where will loudest sounds be heard? (anatomical placement)

between intercostal spaces

10

Where is the aortic valve best heard?

in 2nd intercostal space to the immediate right of sternum

11

Where is pulmonary valve best heard?

2nd intercostal space to the immediate left of sternum

12

Where is the tricuspid valve best heard?

5th intercostal space to immediate left of sternum. (sometimes heard best immediate right of sternum)

13

Where is the mitral valve best heard?

5th intercostal space on mid-clavicular line

14

What patient position might assist in hearing S1 and mitral valve better?

flex forward and to left while twisting a bit to the right

15

What is the logical sweep pattern for ausultating?

start with aortic ? pulmonary ? tricuspid ? mitral. APTM

16

Which side of the patient should you position yourself?

to the patients left (not between their legs!!!)

17

What does the cardiac cycle represent?

a display of all the mechanical, hemodynamic, acoustical and electrical events that occur in the heart during one beat.

18

What are the 5 composite-assembled tracings?

aortic pressure, ventricular pressure, ventricular volume, atrial pressure, phonocardiogram, ecg

19

What is the most critical aspect in understanding the cardiac cycle?

relative timing of events

20

What 4 sources did we gather information from during lab?

ECG, phonocardiogram, peripheral pulse, and stroke volume.

21

What must happen to the heart before the left and right ventricle can contract and eject blood?

heart must first be depolarized (or electrically excited)

22

What does the QRS complex represent?

ventricular depolarization

23

What 3 ways can you dtermine HR (w/out using biopac)?

1) measure the distance in time b/t any successive R waves, by counting boxes (each box =0.04 sec) then divide that number into 60. 2) find R wave that falls on a line on the grid.. count over 4 seconds (25 small boxes).. then count number of beats in that segment. Then multiply by 15. 3) Find R wave and count larger boxes (0.2 sec) until next R wave. With each line count down 300, 150, 100, 75, 60, 50 etc..

24

What is the first method dependent on?

finding a representitive beat

25

What makes #2 method reliable?

the longer the period of time considered the better the value.

26

Which heart sound is recorded on the phonocardiogram?

first heart sound (S1) and second heart sound (S2).

27

What makes S1 difficult to see/Hear?

S4 because it runs into S1.

28

What might a rapid heart rate cause to happen?

S1 run into S2.

29

Which sound is stronger? S1 or S2?

S1

30

What does the time between the onset of the QRS complex and S1 represent?

Lag between excitation and mechanical action