Lab 5- Conduction System

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1

Sounds of Karotkoff

resumption of blood flow into forarm
Lub: closure of AV valves
Dup: closure of semilunar vavles

2

Murmurs

abnormal heart sound; valves do not close tightly and backflow occurs

3

Sphygomomanmeter

instrument used to text blood pressure

4

Systolic Pressure

top # in blood pressure
Pressure at peak of ventricular ejection

5

Diastolic Pressure

bottom # in BP
pressure during relaxation

6

Pulse

altering surges of pressure in artery

7

Pulse pressure

systolic - diastolic

8

Means of arterial pressure

MAP = diastolic + pulse pressure/ 3

9

Intrinsic conduction system (nodal)

-does NOT require nervous system
-Ensure heart muscle depolarizes and re-polarizes in orderly sequence

10

Sinoatrial node

artial contraction

11

AV bundles (his)/ bundle branches

interventricular septum

12

Purkinje fibers

component of nodal system that ramify within muscle bundles of ventricular walls

13

Electrocardiogram

record of voltage and time

14

P wave

atrial depolarization

15

QRS complex

atrial repolarization ventricle depolarizes

16

T wave

ventricle repolarization

17

Depolarization

CONTRACTION OF THE HEART

18

Tachycardia

more than 100 beats per min

19

Bradycardia

less than 60 beats per min
*good for pro athlete (brad-pitt)

20

Fibrillation

rapid uncoordinated heart contraction

21

Cardiac cycle

1 complete heartbeat
(both atrial & ventricles relax/contract)

22

Systolic

period of isovolumic (atrial) contraction; high pressure

23

Diastolic

heart completely relaxation; low pressure
semilunar valves close; av valves open, blood flows passively from pulmonary & systemic circulation into atria

24

Dicrotic notch

momentary increase in aortic pressure resulting from elastic recoil of aorta = pressure fluctuation

25

Apical pulse

counting of heart beats

26

Spirometer

instrument to measure breaths

27

Lung capacity formula

VC = TV + IRV + ERV
TV= IRV - ERV - VC

28

Vital Capacity

maximum amount of air a person can exhale after filling lungs to maximum

29

Tidal volume

amount of air inhaled and exhaled during a single breath at rest- NORMAL BREATHING

30

Expiratory reserve volume ERV

maximum amount of air that can be expelled from lungs by exhaling forcefully after the end of normal tidal volume- WHAT LEFT IN LUNGS

31

Inspiratory reserve volume IRV

amount of air that can be inhaled in excess of normal inspiration during quiet breathing

32

Inspiratory capacity IC

MAXIMUM amount of air that can be inhaled from normal-end expiratory level
-not measured by spirometer

33

Residual volume RV

amount of air remaining in lungs after maximum forced exhalation

34

Residual volume male/female

male= 1.2 L
females = .9 L

35

total lung capacity TLC

maximum volume of air that lungs can hold when distended to greatest possible extent

36

TLC formula

TLC= VC + RV
VC= IRV + ERV + TV

37

Inspiratory reserve volume formula

IRV = VC- (TV + ERV)

38

Inspiratory capacity formula

IC = VC - ERV

39

Total lung capacity formula

TLC = VC + RV

40

Vital capacity formula

VC = IRV + TV + ERV

41

Inspiratory Reserve Volume

3,100 mL

42

Tidial Volume

500 mL

43

Expiratory Reserve Volume

1,200 mL

44

Residual Volume

1,200 mL

45

Inspiratory Capacity

3,600 mL

46

Funtional Reserve Capacity

2,400 mL

47

Total Lung Capacity

6,000 mL

48

Vital Capacity

4,800 mL

49

Heart Sound

1. Lubb- closure of AV valves
2. Dubb- closure of Semilunar valves

50

Lubb

closure of AV valves

51

Dubb

closure of Semilunar valves