2. The Heart as a Pump + Anatomy Flashcards Preview

Cardiovascular System > 2. The Heart as a Pump + Anatomy > Flashcards

Flashcards in 2. The Heart as a Pump + Anatomy Deck (23)
1

What is the principle pacemaker of the heart called?

Sino atrial node

2

Where is the sino atrial node located?

Right atrium

3

How long does electrical activity get halted at the AV node for?

120ms

4

What causes the first heart sound?

AV valve closing

5

What causes the second heart sound?

Outflow valves closing

6

What causes the outflow valves to open?

Ventricular pressure exceeding aortic pressure

7

What is the period of time during ventricular systole before the outflow valves open called?

Isovolumetric contraction

8

What causes the AV valves to open?

Ventricular pressure falling below atrial pressure

9

When does the rapid filling phase occur?

Start of diastole

10

What causes murmurs to be heard?

Turbulent blood flow

11

What causes turbulent blood flow?

A stenosed valve
An incompetent valve

12

At what point in th cardiac cycle would you be most likely to hear a systolic murmur caused by aortic stenosis?

Rapid ejection phase

13

What is stroke volume?

The blood that the heart ejects per beat (roughly 80ml)

14

How do you calculate cardiac output?

Stroke volume x heart rate

15

What makes up the left border and apex of the heart?

Left ventricle

16

What forms the right border of the heart?

Right atrium

17

What mainly forms the inferior border of the heart?

Right ventricle

18

The right atrium receives blood from the cardiac veins via what vessel?

The coronary sinus

19

Where does the coronary sinus lie?

Posterior atrioventricular groove

20

The left coronary artery arises from what?

The left aortic sinus

21

Parasympathetic activity to the heart is delivered by which nerve?

Vagus nerve

21

At what vertebral level does the abdominal aorta split into the common iliac arteries?

L4

22

What arteries split off of the brachiocephalic trunk?

Right subclavian
Right common carotid