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-cardiopulm Npte > cardio anatomy & physio 1/17 > Flashcards

cardio anatomy & physio 1/17 Flashcards

1
Q

AV valves closed during what part?

A

ventricular systole/contraction

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2
Q

amount of blood in ventricles after systole

A

50mL

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3
Q

amount of blood in ventricles after diastole

A

120mL

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4
Q

when does atrial kick occur?

A

last 1/3 of diastole, completes ventricular filling, last 20-30% end diastolic volume

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5
Q

when does blood circulate from aorta to myocardium via coronary arteries?

A

diastole

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6
Q

which coronary artery? blood supplies

  • R atrium
  • most R ventricle
A

RCA Right coronary artery

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7
Q

which coronary artery? blood supplies

  • inferior wall L ventricle
  • AV node
  • bundle of His
A

RCA Right coronary artery

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8
Q

which coronary artery?

- SA node 60% of people

A

RCA Right coronary artery

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9
Q

which coronary artery?

  • L ventricle
  • has 2 main divisions
A

LCA

Left coronary artery

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10
Q

which coronary artery? blood supplies

  • L ventricle
  • L interventircular septum
A

LAD

left anterior descending artery

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11
Q

which coronary artery?

  • inferior apex
  • branches to R ventricles
A

LAD

left anterior descending artery

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12
Q

which coronary artery?

  • blood to lateral and inferior wall L ventricle
  • blood to part of L atrium
A

Circumflex LCx artery

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13
Q

which coronary artery?

- supplies SA node 40% of time

A

Circumflex LCx artery

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14
Q

which coronary artery? branches to

  • Posterior interventricular artery
  • R marginal artery
A

RCA

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15
Q

which coronary artery? branches to

  • circumflex artery
  • diagonal
A

LCA

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16
Q

which coronary artery? branches to

  • Anterior interventricular artery
  • L marginal artery
A

LCA

17
Q

which coronary vein receives venous blood from heart? empties to what chamber?

A

coronary sinus

R atrium

18
Q

what is main pacemaker of heart? where is it? impulse rate?

A

SA node
junction superior vena cava & R atrium
60-100bpm

19
Q

SA and AV node innervated by sympathetic or parasympathetic innervation? what do they affect?

A

both

heart rate, strength of contraction

20
Q

where is AV node? Firing rate?

A

R atrium and ventricle

40-60bpm

21
Q

connection between AV node and purkinje fibers? firing rate of purkinje fibers?

A

AV node > AV bundle of His > split R and L bundle branches on both sides of interventricular septum
20-40bpm

22
Q

heart has what type of muscle tissue?

A

striated muscle fibers with lots of mitochondria

23
Q

what term -amount of blood ejected from heart with each contraction? normal range?

A

stroke volume SV

55-100mL/beat

24
Q

what determines SV?

A

preload, L ventricular end diastolic volume
afterload
contractility

25
Q

what rule dictates greater preload greater quantity of blood pumped

A

frank starling law

26
Q

what term - amount blood discharged from ventricle per minute? normal range at rest?

A

cardiac output

4-5L/min

27
Q

calculation for CO?

A

CO = HR x SV

28
Q

what term - pressure in L ventricle during diastole? normal range?

A

LVEDP L ventricular end diastolic pressure

5-12mmHg

29
Q

what term- % blood emptied from ventricle during systole?
what does it measure?
how is it calculated?
average%?

A

ejection fraction EF
measures LV function
EF = SV/LVEDV L ventricular end diastolic volume
normal >55%, lower is more impaired

30
Q

when does venous return increase? decrease?

A

increase - increase blood volume

decrease - hypovolemic shock

31
Q

what term -

lose >20% (one-fifth) of your body’s blood or fluid supply, not enough blood for heart to pump

A

hypovolemic shock

32
Q

when does diastolic filling time decrease?

A

increased HR

heart disease

33
Q

what is RPP rate pressure product?
how to calculate?
what increases it?

A

RPP = Myocardial oxygen demand MVO2
energy cost to myocardium
RPP = HR x SBP
increased with activity, HR, BP

-cardiopulm Npte (17 decks)

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