Mediastinum & Heart - Blood Supply Flashcards
(21 cards)
when is the heart at its max fill?
end of diastole
at the end of systole there is a small amount of blood left in the ____
ventricles
the total amount of blood ejected at each beat is the
stroke volume
formula to find stroke volume
end diastolic volume - end systole volume
cardiac output formula
heart rate x stroke volume
the amount of blood ejected per minute
cardiac output
two ways to increase cardiac output
- increase heart rate
- increase stroke volume
endurance training tends to increase ____ ____ and subsequently rest heart rate ____
increase stroke volume
heart rate decreases
the heart is primarily supplied by
right and left coronary arteries (first branches off aorta)
arises from left side of aorta, passes posterior to the pulmonary trunk
left coronary artery
- “widow maker”
- a.k.a. left anterior descending artery
anterior interventricular artery
supplies left atrium and left posterior ventricle
circumflex branch of left coronary artery
branches of left coronary artery (2)
- anterior interventricular artery
- circumflex branch of left coronary artery
- emerges from right side of aorta
- descends in the coronary sulcus on anterior surface of heart
- between right atrium and right ventricle
right coronary artery
right coronary artery branches
- marginal artery
- posterior interventricular artery
function of cardiac veins
carry the deoxygenated blood from the heart wall into the right atrium
the cardiac veins occupies the posterior part of the
coronary sulcus
three main branches drain into the coronary sinus
- great cardiac vein
- middle cardiac vein
- small cardiac vein
anterior cardiac veins drain directly into the
right atrium
vessels off of the aorta (4)
- coronary arteries
- brachiocephalic trunk
- left common carotid artery
- left subclavian artery
brachiocephalic trunk gives rise to:
- right common carotid
- right subclavian
