Ext heart Flashcards

1
Q

What space does the pericardial sac occupy

A

2/3 to the left of the midsternal line and 1/3 to the right of the midsternal line

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2
Q

what are the two layers of the pericardial sac

A

fibrous and serous

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3
Q

What does the fibrous layer attach to (2)

A

attaches to central tendon of diaphram inf, post surface of sternum (by sternal pericardial ligs)

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4
Q

layers of serous pericardium

A

continous with outer layer of heart forming epicardium

2 layers- parietal (covers wall) and visceral with pericardial cavity in between

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5
Q

what creats the pericardial sinuses (+ what are the 2)

A

continuation b/w visceral and periatal parts

-transverse/oblique

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6
Q

where does the transverse and oblique pass

A

transverse–>bw aorta and pulmonary trunk (ant), and sup vena cava (post)

Oblique–> located post to the heart

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7
Q

what is the blood supply of the pericardial sac

A

right+ left Pericardiophrenic artery from int thoracic artery

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8
Q

What is the venous drainage of the pericardial sac (and what do they drain into)

A

pericardiophrenic veins to brachiocephalic veins (to end in azygous venous system)

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9
Q

what inn the pericardial sac and when it stretches due to fluid accumulation where does pain refer to

A

R+L phrenic nerves- pain will be refered to supraclavical and shoulder region bilaterally (C345)

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10
Q

3 layers of the heart from out to in

A

epicardium
myocardium
endocardium

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11
Q

Where is the coronary sulcus found

A

bw antrium and the ventricles (atrial ventricular groove)

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12
Q

What is the apex of the heart formed by (and what intercostal space does it go into)

A

inferolateral part of left ventrical (projects into the 5th left intercostal space)

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13
Q

what are the right and left pulmoany surfaces of the heart formed by

A

r- right atrum

l- l ventrical

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14
Q

what is the right and left border of the heart

A

r- r atrium

l- l ventrical and left auricle

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15
Q

what is the sup and inf part of the heart formed by

A

sup- left aurical, base of pulmonary trunk, asceding aorta, right aurical, base of sup vc

If- r and left ventrical

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16
Q

what is on ant and base of heart (+ vert lvl)

A

ant- right ventrical

base- left atrium, vert body t6-9

17
Q

what does the right coronary artery arise from and what does it travel in

A

right aortic sinus

-enters right coronary sinus to end at post interventricular groove

18
Q

Branches of right coronary artery

A
  1. Sinoartrial nodal branch
  2. Right marginal branch (on inf border)
  3. AV nodal branch
  4. Post interventricular branch
19
Q

What does the post interventricular branch supply

A

post 1/3 of the interventricular septum

20
Q

Where does the left coronary artery arise from and where does it travel

A

left aortic sinus

- enters coronary sinus and branches into various branches

21
Q

what are the branches of the left coronary artery

A
  1. Ant interventricular-to apex of heart
    1a. Lat digonal branch- supplies l ventrical
  2. Circumferential- runs post on heart and ends before crux
    2a. Left marginal
22
Q

what does the ant interventricular branch supply

A

2/3 of the interventriculr septum

23
Q

what supplies the conducting system of heart (and %)

A

most consistantly from r coronry artery
60% of ppl get Sa from r coronary
80% of people get AV from r coronary

24
Q

How many people have r coronary dominace

A

2/3 of people (post IV branch from r coronary)

25
What does the great cardiac vein course with and drain into
originates at midpoint of interventricular septum, travels with ant IV and drains into coronary sinus
26
where does the middle cardiac vein course
originates on the distal part of the ant iv sulcus, turns at apex of heart, travels w post iv and drains into coronary sinus
27
Where does the small cardiac vein course
traves with right marginal artery and drains into sinus
28
What is the oblique vein a reminent of
left SVC from intrauterine life