Thorax 4 - The Heart, Coronary Circulation, Conducting System Flashcards Preview

MD3001 > Thorax 4 - The Heart, Coronary Circulation, Conducting System > Flashcards

Flashcards in Thorax 4 - The Heart, Coronary Circulation, Conducting System Deck (38)
1

What is another name for the left coronary artery?

Left Main Stem

2

What two arteries does the left main stem divide into?

Circumflex artery
Left anterior descending artery/anterior intraventricular artery

3

What is the marginal artery a branch of?

The right coronary artery

4

What are the SAN and AVN supplied by?

Right coronary artery

5

What is the name given to obstruction of the right coronary artery?

Inferior infarct

6

What is the name given to obstruction of the left anterior descending?

Anterior infarct

7

What is the name given to obstruction of the circumflex artery?

Lateral infarct

8

Why is an obstruction of the left anterior descending so dangerous?

Causes an anterior infarct which may cause catastrophic loss of left ventricular function and cardiac arrest

9

Where do the coronary arteries originate?

Just superior to the aortic valve

10

What is the order from most common to least common, of infarcts due to obstruction of coronary arteries?

Anterior
Inferior
Lateral

11

What is the name given to the vein that lies parallel to the left anterior descending artery?

Great cardiac vein

12

Where do the anterior cardiac veins drain to?

Atria

13

What is the function of the Purkinje Fibres?

To spread the signal to the ventricles

14

What is the proximal part of the bundles of His supplied by?

Right coronary artery

15

Where is cardiac pain referred to?

Anterior chest wall and possibly medial aspect of left arm

16

What does the left coronary artery divide into?

LAD (anterior interventricular)
Circumflex

17

In which groove does the RCA run in?

AV groove / Coronary sulcus

18

List the branches of the RCA.

SA nodal branch (1st)
Right marginal (2nd)
Posterior interventricular (3rd)

19

What does the RCA supply (inc. its branches)?

• Walls of RA & RV
• SA & AV nodes
• Posterior part of interventricular septum (proximal portion of AV bundle of His - arrhythmia)
• Small areas of the walls of LA & LV

20

What is obstruction of the RCA known as?

Inferior infarct

21

What is Bundle of His ischaemia likely to cause?

Arrhythmias

22

Which groove does the LAD follow?

Anterior interventricular groove

23

What does the LCA supply (inc. its branches)?

• Walls of LA & LV
• Most of the interventricular septum including part of the AV bundle of His
• Left anterior descending LAD

24

Which coronary artery is most commonly affected by atherosclerosis?

LAD

25

What is obstruction of the LAD known as?

Anterior infarct

26

What is obstruction of the circumflex known as?

Lateral infarct

27

What can anterior infarct lead to?

Ventricular fibrillation

28

In right cardiac dominance, what extra branch does the RCA give?

Right circumflex

29

What are the two most common vessels used in a coronary artery bypass graft?

Left internal thoracic / Left internal mammary artery (LIMA)
Great saphenous vein

30

In a percutaneous transluminal coronary angioplasty, where is the catheter inserted?

Femoral artery

31

Name the 3 cardiac veins and state which coronary artery they run alongside.

Small - with Marginal
Middle - with Posterior Interventricular
Great - with LAD

32

Which of the cardiac veins becomes the coronary sinus?

Great cardiac vein

33

How do anterior cardiac veins and venae cordis minimi drain to the RA?

Directly through cardiac muscle

34

Between which two chambers does the coronary sinus lie?

LA & LV

35

From where is sympathetic innervation of the heart?

Both left and right sympathetic trunks

36

From where is parasympathetic innervation of the heart?

Left and right vagus nerves

37

In relation to the arch of aorta, where does the cardiac plexus lie?

Inferior

38

Which spinal nerves form the origin of the cardiac plexus?

T1 - T4

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