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. 2007 Mar 8;581(Pt 2):725–739. doi: 10.1113/jphysiol.2007.128199

Figure 4. Sarcomere length dependence of isotonic shortening velocity and power output in β-MyHC cardiac myocytes.

Figure 4

A, absolute force–velocity (top) and power output (bottom) curves from myocytes contained β-MyHC at long SL (•) and short SL (○). B, normalized force–velocity (top) and power output (bottom) curves from β-MyHC myocytes at long SL (•) and short SL (○). As in α-MyHC myocytes, isometric force and absolute power output were decreased at short SL, but the decrease in shortening velocity and power was even more pronounced in β-MyHC myocytes as indicated by the greater fall in peak normalized power output. Data points are means ±s.d.