Cardiac Output Flashcards

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11 cards   |   Total Attempts: 188
  

Cards In This Set

Front Back
Stroke Volume
Volume of blood ejected from a ventricle per contraction.
Cardiac Output
Volume of blood ejected from a ventricle per minute.
Cardiac output (ml/min) = ___________ x heartrate
Stroke volume (ml)
Preload
Amount the heart stretches before contraction
An (increase/decrease) in preload results in an (increase/decrease) in force of contraction and stroke volume.
Increase;increase
Contractility
Forcefulness of contraction of the heart muscle tissues.
An (increase/decrease) in contractiliy results in an (increase/decrease) in stroke volume.
Increase;increase
(Increases/Decreases) in contractility are stimulatd by (Sympathetic/Parasympathetic activity) and digitals, while (increases/decreases) occur through inhibition of (Sympathetic/Parasympathetic activity), anesthetics, and (increased/decreased) extracellular K+.
Increases; Sympathetic activity; decreases; Sympathetic activity; increased
Afterload
Amount of force the contraction must provide to open the semilunar valves.
An (increase/decrease) in afterload results in a (increase/decrease) in stroke volume.
Increase; decrease
Afterload is often (increased/decreased) by hypertension and (atherosclerosis/arteriosclerosis).
Increased; atherosclerosis