Cardiology Flashcards Preview

Physiology > Cardiology > Flashcards

Flashcards in Cardiology Deck (36):
1

What is the passage of blood through the heart?

superior and inferior vena cava, right atrium, tricuspic valve, right ventricle, pulmonary semilunar valve, pulmonary trunk and arteries to the lungs, oxygenated blood leave lungs through the pulmonary veins, left atrium, bicupid valve, left ventricle, aortic semilunar valve, aorta, coronary arteries

2

Why are funny channels funny?

because the are permeable to both K and Na and not calcium

3

Why are cardiac action potentials unique?

because depolarization is caused by sodium and calcium

4

____ causes pacemaker cells to initially depolarize, and in non-pacemaker cells ____ influx makes action potentials ___ with a plateau phase.

calcium, calcium, last longer

5

depolarization means

an action potential

6

How do you calculate mean arterial pressure?

diastolic *2 + systolic/3

7

Resistance is increased by

higher viscosciy, a longer length and smaller radius*

8

at the P wave

the atria repolarizes, and spreading of SA node signal

9

the QRS complex is

ventricle depolarization

10

T wave is ventricle

repolarization

11

Second degree heart block is when the

signal is not making it to the AV node so multiple P waves to trigger QRS

12

Third degree heart block ECG looks like

normal P but wide QRS

13

Artial fibrillation on an ECG looks like

no P and no QRS

14

the first and second heart sounds are from?

closure of AV valves and closing of semilunar valve

15

blood pressures are lower on the ____ side of the body

right

16

Diastole is when the ventricles are ____

relaxed

17

Systole is when the ventricles are _____

contracted

18

ESV = _______ ( __mL)

end of systole volume 65mL

19

EDV = _______ (___ mL)

end diastole volume, 135

20

Stroke volume = ____ and it is the amount of blood pumped by ____ in _______

EDV-ESV, a, 1 ventricle in 1 contraction

21

Cardiac output =

heart rate * Stroke Volume

22

What affects stroke volume?

preload of cardiac muscle cells, slow heartbeat/exercise, blood loss and rapid heartbeat

23

Parasympathetic Nerves _____ the heart rate via the hormone _____

slow down, achetacholine

24

Sympathetic nerves _____ the heart rate, through the hormone _____

increase, epinephrine

25

the sympathetic fibers can also increase ____ but the parasympathetic fibres have no affect on this

contraction

26

P wave to R is

atrial systole (starts to go into ventricles), conduction through AV node and AV bundle

27

QRS to end of T

ventricular systole (leaving the ventricles)

28

Between T and P

ventricular diastole (filling ventricles and then out to body)

29

S-T segment the ventricles

contract

30

T wave the ventricle

repolarizes

31

If the sympathetic nervous system increase contraction this will ____ stroke volume

increase

32

Net fluid pressure =

capillary pressure - interstitial fluid pressure - plasma colloid pressure + interstitial fluid colloid

33

edema means that filtration is _____ than capillary absorption

greater

34

Myocardial infraction is an elevated ___ interval

ST

35

diurectics ____ blood volume

decrease

36

if you block angiotensin 2 you decrease

vasoconstriction