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Flashcards in Cardiology I Deck (135)
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0

What controls the opening and closing of the heart valves?

Chamber pressure.

1

What occurs during ventricular systole?

Contraction of the ventricles which sends blood to the body and lungs.

2

What occurs during ventricular diastole?

Relaxation of the ventricles which allows them to refill

3

What are the two left coronary arteries?

Anterior descending and circumflex arteries

4

What part of the heart does the circumflex artery supply?

It supplies the left and around the back of the heart

5

What is the right coronary artery?

Posterior interventricular artery

6

What vein does the heart empty into (coronary)?

The great coronary vein.

7

The vein that filters the heart is called the _____ and it empties into the _______.

Great coronary vein; right atrium.

8

What is the blood flow through the heart?

Vena cava
Right atrium
Tricuspid valve
Right ventricle
Pulmonary valve
Pulmonary artery
Lungs
Pulmonary vein
Left atrium
Bicuspid valve
Left ventricle
Aortic valve
Aorta
Body.

9

______ is the contraction of the ventricles.

Systole

10

______ is the period in which the ventricles fill with blood from the atria.

Diastole

11

What is the time of one contraction & one relaxation?

Cardiac cycle

12

What is the length of one cardiac cycle?

Approx. 0.8 seconds

13

What is the length of systole?

Approx. 0.2 seconds

14

What is the length of diastole?

Approx. 0.52 seconds

15

_____ is the measurement of the amounts of blood pumped out the ventricles.

Ejection fraction

16

Ejection fraction is the measurement of the amounts of what?

Blood pumped out the ventricles.

17

What is the normal value of ejection fraction?

55-70%

18

What part of the cardiac cycle lasts approximately 0.2 seconds?

Systole.

19

What part of the cardiac cycle lasts for approximately 0.52 seconds

Diastole

20

What lasts approximately 0.8 seconds?

One cardiac cycle

21

______ is the amount of blood pumped out of ventricles in a single beat.

Stroke volume.

22

___ is the pressure in the ventricles at the end of diastole.

Preload

23

What is preload?

The amount of pressure at the end of diastole.

24

Preload is directly affected by the volume of blood that what?

Returns to the right atrium

25

_____ is the resistance against which the heart must pump against.

Afterload

26

Afterload is what?

The resistance against which the heart must pump against.

27

What law deals with the stretching of the myocardia?

Sterling's Law

28

What does Sterling's law state?

The myocardium can be stretched and will return to its normal state, but if overworked (stretched too far) it will lose its ability to return to its normal state.

29

What is peripheral vascular resistance?

How much pressure is in the arterioles that the heart must pump against.