Increased Preload & Decreased Contractility
Decreased Preload & increased Contractility
Decreased Preload & Decreased Contractility
Increased Preload & increased Contractility
Ans. D. Increased Preload & increased Contractility.
- The darker solid lines in the graph represnts normal force-velocity curve.
- Curve 1 with upward shift in the curve is due to increased preload & further diaplacement in curve 2 in upward direction is due to increased contractility.
- Force-velocity curves are altered when preload or contractility is changed.
- When preload is increased, the curve is shifted upward, but V m (the maximal velocity, occurring at zero afterload) is unchanged.
- Increased contractility, however, results in a shift in the curve with an increase in Vm.