Cardiac Output NCLEX Flashcards
what is cardiac output
amount of blood ejected from the heart in 1 minute
cardiac output equation
CO=HR X SV
cardiac output units
ml/min
heart rate units
beats per min
stroke volume units
ml per beat
increased heart rate ____ cardiac output
increases
decreased heart rate ____ cardiac output
decreases
heart rate is controlled by what node
the SA node/pacemaker of the heart
SA node beats per minute?
60-80 beats per minute
what are some positive chronotropes that increase heart rate
SNS, Epinephrine, Norepinephrine, Atropine, exercise, age, hormones (T3, T4)
what are some negative chronotropes that decreases heart rate
PSNS, digoxin, metotropolol (any beta blocker), hormones
what is stroke volume
the amount of blood we push out of our heart per beat
increased stroke volume ___ cardiac output
increases
decreased stroke volume ____ cardiac output
decreases
stroke volume can be divided into what 3 categories
preload, contractility, and afterload