Heart Flashcards Preview

Anatomy Written 3 > Heart > Flashcards

Flashcards in Heart Deck (38):
1

Pericardium

Double walled fibroserous sac which encloses the heart and the roots of the great vessels

2

Pericardium attached to...

Sternum via the sternopericardial ligaments

3

Fibrous Pericardium

Anchor, tough and inelastic
Fused to central tendon of diaphragm
Protects against overfilling

4

Serous Pericardium

Parietal
Visceral
Pericardial Cavity

5

Serous Pericardium - Parietal

Fused to internal surface of the fibrous pericardium
Can't separate parietal from fibrous

6

Serous Pericardium - Visceral

Epicardium - shiny layer on top

7

Serous Pericardium - Parietal Cavity

Sinuses
- Oblique = space btw visceral and parietal
- Transverse = significant with bipass - outflow

8

Heart Base

Left Atrium

9

Heart Apex

Left Ventricle
Left 5th intercostal space

10

Surfaces

Planar
Anterior
Inferior
Left

11

Anterior Surface

Sternocostal = right ventricle

12

Inferior Surface

Diaphragmatic = both ventricles, primarily left

13

Left Surface

Pulmonary = left ventricle, occupies cardiac notch

14

Borders - Right

Right Atrium
Right 3rd costal cartilage to right 6th costal cartilage

15

Borders - Inferior

Right ventricle and apex of left ventricle
Right 6th costal cartilage to left 5th intercostal space

16

Borders - Left

Left ventricle and left auricle
Left 5th intercostal space to left 2nd costal cartilage

17

Borders - Superior

Right and left auricles, conus arteriosis
Left 2nd costal cartilage to right 3rd costal cartilage

18

Cardiac Grooves and Sulci

Coronary Sulcus (atrioventricular)
Anterior Interventricular Groove
Posterior Interventricular Groove

19

Cardiac Skeleton

Fibrocartilagenous tissue
Divides atria from ventricles
Provides barrier btw atria and ventricles for conductive system
Provides attachment for heart valves and myocardium

20

Tendon of Conus Arteriosis

Outlfow for RV
Aortic to pulmonary semilunar velves

21

Left Fibrous Trigone

Mitral valve to aortic semilunar valves

22

Right Fibrous Trigone

Atrioventricular valves to aortic semilunar valves

23

Arterial Supply

Right and Left Coronary

24

Right Coronary

Marginal and posterior interventricular branches
Anastomoses with circumflex
60% supplies SA node, supplies AV node

25

Left Coronary

Circumflex and anterior interventricular branches
40% supplies SA node

26

Venous Drainage

Coronary Sinus
Great Cardiac Vein
Middle Cardiac Vein
Small Cardiac Vein

27

Conducting System

Cardiac muscle cells and conducting fibers specialized for initiating and conducting impulses

28

Sinoatrial Node

Pacemaker
Initiates impulse for contraction (70 - 80 bpm)
Located at junction of SVC and right atrium

29

Atrioventricular Node

If required, 40-60 bpm
Located posteroinferior region of interatrial septum near coronary sinus
Collects impulses from atria and distributes to ventricles

30

Atrioventrivular Bundle

If required, 20-40 bpm
Located within IV septum to ventricular myocardium
Divides into right and left bundle branches

31

Innervation of heart

Cardiac Plexus
Symp = chain T1-T4 and use chain to synapse
Para = vagus

32

Heart Valves

Located in an oblique line from left 3rd costal cartilage to the right 6th costal cartilage

33

Auscultatory Areas

Areas on the surface of the chest wall where you listen to blood flow through the valves and chambers of the heart

34

Normal heart sounds are a result of...

blood turbulence upon closure of the heart valves

35

Aortic Semilunar Valve - Aus

Right 2nd intercostal space

36

Pulmonary Semilunar Valve - Aus

Left 2nd intercostal space

37

Tricuspid Valve - Aus

Lower left body of sternum

38

Mitral Valve - Aus

Left 5th intercostal space