Table 1.

Effect of salbutamol on contractile properties of rat Damus

Group Pt, N/cm2Po, N/cm2Pt/Po, %Vmax, Lo/s Max Power, W/m2Total Work, J/m2
Ctl 8.3 ± 0.4 21.2 ± 0.539.1 ± 1.6 5.30 ± 0.21 1,811 ± 64340.8 ± 24.6
Slb 11.5 ± 0.3* 25.6 ± 0.4* 45.1 ± 1.4* 5.98 ± 0.21* 2,275 ± 146* 463.7 ± 36.5*
  • Values are means ± SE. Diamus, diaphragm muscle; Ctl, control animals; Slb, salbutamol-treated (25 μg/kg intracardial loading dose and 0.05 μM in vitro) animals; Pt, peak twitch force; Po, maximum tetanic force;V max, maximum velocity of shortening;L o, optimal fiber length; Max power, maximum power output.

  • * Significant difference from Ctl, P < 0.05.