11. The strength of heart muscle contractions controls the stroke volume . 12. Blood volume increases act to increase stroke volume of the heart via Starling's law. 13. This increases the contractile force of the cardiac muscle, resulting in increased stroke volume . 14. The area under the flow-versus-time curve for one cardiac cycle is the stroke volume . 15. Conversely during expiration, the heart is compressed, decreasing cardiac efficiency and increasing stroke volume . 16. Cardiac output ( CO ) is the product of stroke volume and heart rate. 17. This type of exercise also increases both heart rate and stroke volume of the heart. 18. This is affected by stroke volume and heart rate. 19. Sodium thiopental decreases the cardiac stroke volume , which results in a decrease in cardiac output. 20. The stroke volume is affected by changes in preload, afterload, and inotropy ( contractility ).
