Table 1. dp/dt^max, Half Relaxation Time (HRT), and Force (Tension)–Frequency Relations

Data are expressed as mean ± SD (n = 8 for each group). Group assignment: see text. Normalized dp/dt^maxwas calculated by dividing dp/dt^maxby twitch tension.

* P < 0.05 versus group sham.

† P < 0.05 versus group sepsis.

‡ P < 0.05 for group sepsis–propofol 50 versus group sepsis–propofol 25.

dp/dt^max= maximum of the first derivative of developed pressure.