A. Representative contraction, indexed by sarcomere length (SL) shortening at 1 Hz, of intact myocytes isolated from Sham, MI and MI-D mice. B. Mean ± S.E.M. of the amplitude of SL shortening from Sham, MI and MI-D mice. C. Mean ± S.E.M. of the kinetics of contraction and relaxation from Sham, MI and MI-D mice. D. Mean ± S.E.M. of diastolic SL. Delapril treatment in MI-D cells increases diastolic SL when compared to Sham and MI cells. In B, C and D: Sham (n=26), MI (n=31) and MI-D (n=23). *P<0.05 in comparison with Sham mice. †P<0.05 in comparison with MI mice.