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Cardio anatomy > Vasculature, Conducting System, ... > Flashcards

Vasculature, Conducting System, ... Flashcards

1
Q

supply the heart

A

Coronary arteries

cardiac veins

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2
Q

coronary arteries are ——sized arteries, but they differ Structurally from the other medium sized arteries in that there

A

medium

1) Wall is thick
2) The tunica Media of the coronary arteries are thick
3) Internal elastic lamina is clearly seen
4) the sympathetic Stimulation will cause vaso dilation in contrast to other arteries that will constrict
5) the blood inters the coronary arteries during diastole not during systole

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3
Q

Endocardium and subendocardial tissue receive nutrients and oxygen by

A

diffusion

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4
Q

Blood vessels of the heart are embedded in— deep to epicardium

A

fat

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5
Q

Blood vessels of the heart are affected by

A

both sympathetic and parasympathetic nerves

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6
Q

Right and left coronary arteries arise from —— just distal to the aortic valve from the aortic sinuses

A

ascending aorta

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7
Q

The coronary arteries supply

A

epicardium and myocardium

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8
Q

The arteries supplying the myocardium (branches of coronary arteries) are——

A

end arteries,

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9
Q

end arteries, meaning

A

they do not anastomose, but there is sufficient collateral circulation in the heart

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10
Q

Left coronary artery

A

1)left coronary artery (the largest one)
2)circumflex branch of LCA
3)left marginal artery (obtuse)
4)anterior interventricular artery (Left anterior
descending, LAD) branch of LCA-

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11
Q

Left coronary artery (LCA)

Arises from left——-passes
between ——-and——-

A

aortic sinus

pulmonary trunk , left
auricle

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12
Q

In 40% of individuals Left coronary artery (LCA) gives a branch
to

A

sinuatrial node (SA node; pacemaker

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13
Q

Circumflex branch of LCA-
Follows ———

and enters the————-

A

coronary sulcus (groove)

post surface of the heart (base)

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14
Q

Lt marginal artery (obtuse)

Follows——- and supplies——-

A

left margin

left ventricle

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15
Q

Anterior interventricular artery (Left anterior
descending, LAD)

It descends in————
Reaches apex and turns around and enters the—-

A

anterior interventricular groove

diaphragmatic surface

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16
Q

LAD It commonly

anastomoses with

A

post
interventricular branch
of Rt coronary artery

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17
Q

Great cardiac vein- Non-coronary aortic sinus;
Accompanies LCA
and joins on the—— with the———

A

posterior surface

coronary sinus (vein)

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18
Q

When it comes to the interventricular groove on the anterior aspect the left coronary artery divides into two branches

A

T

19
Q

Base of the heart

A

Circumflex branch of LCA-

20
Q 
Circumflex branch of LCA- 
• Reaches post part of
coronary sulcus 
• Most commonly it does
not reach the———
• Supplies post aspect of
the heart
A

middle
part of the
diapragmatic surface

21
Q

Crux of the heart

A

is the + point
formed by the 2
ventricles and 2
atria

22
Q

The circumflex branch reaches the crux and

A

anastomoses with the right coronary artery

23
Q

Right coronary artery

A

1) Right coronary artery (RCA)-
2) Right marginal branch of RCA
3) Atrial branch of RCA
4) Atrial and ventricular branches of RCA (AV) nodal
5) SA nodal branch from RCA- In 60% of individuals
6) Post interventricular artery (post
descending artery PAD)

24
Q

Right coronary artery (RCA)-

Arises from

A

right aortic

sinus

25
Q

RCA Runs downwards in———Reaches——- and
enters the
———

A

coronary sulcus

inf border

diaphragmatic surface

26
Q

RCA and the circumflex will form anastomoses (the RCA will run posteriorly to the crux where it meets the circumflex branch)

A

T

27
Q

Atrial branch of RCA

disappear immediately deep to the ——-e and reappears———

A

right auricle

anterior to the superior vena cava

28
Q

Atrial and ventricular branches of RCA Supply

A

atria and ventricle

29
Q

Right marginal branch of RCA Runs towards

A

the apex, but does not reach

30
Q

Coronary arterial dominance is defined by the vessel which gives rise to the posterior descending artery (PAD). 18% of the cases both arteries give PAD so there will be 2 PADs this is called co- dominance

A

T

31
Q

Areas of the heart supplied by the coronary arteries

LCA Supplies :

A

-Left atrium and left ventricle
-Sometimes SA node (40%) AV node -Atrioventricular bundle (conducting
system
-small anterior part of rt ventricle
-Ant 2/3 of interventricular septum

32
Q

RCA Supplies :

A
  • Most of right atrium
  • Pulmonary trunk
  • SA node (60%) and AV node
  • small post part of lt ventricle
  • Right ventricle and apex of heart
  • Post 1/3 of interventricular septum
33
Q

most common occlusion points in the coronary arteries

A

1) anterior interventricular branch
2) right coronary artery
3) circumflex branch

34
Q

Variations in distribution of coronary arteries

A

Slides

35
Q

Venous drainage of the heart

A
  • Great cardiac vein accompanies the ant interventricular artery
  • Middle cardiac vein accompanies post interventricular artery
  • All veins, except ant cardiac veins, open into coronary sinus
  • Coronary sinus is the largest vein of the heart and opens into the right atrium
  • Ant cardiac veins open into right atrium
36
Q

The conducting system, which coordinates the cardiac cycle, consists of—— cells and highly specialized

A

cardiac muscle

conducting fibers

37
Q

SA node-located

A

deep to epicardium

38
Q 
SA node is a 
• Specialized cardiac muscle and fibroelastic
tissue-pacemaker of the heart 
• Initiates and regulates impulse for
contraction 70 times/min 
• Influenced by sympathetic and
parasympathetic fibers
A

T

39
Q

AV node is smaller, but like SA node tissue-located

A 
near the opening of SA node
coronary  sinus (triangle  of Koch) in post- inf part of inter-atrial  septum
40
Q

AV bundle (of His)-transmits signals to

A

ventricles (only connection between atria and ventricles)

41
Q

SA and AV nodes are

usually supplied by

A

RCA

42
Q

The AV bundle traverses
through the center of the
——, thus supplied by

A

IVS

LCA (through LAD)

43
Q

————containing Purkinje fibers

A

Moderator band (septomarginal trabecula)

44
Q

Purkinje fibers stimulate the

A

ventricles, IV septum and papillary muscles

Cardio anatomy (5 decks)

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