Table 1 Heart rate and variables of atrial contraction in sinoatrial preparations of thermally acclimated crucian carp

Heart rate (beats/min)

11.2 ± 0.5*

52.1 ± 1.7

Force (mN/mg)

1.2 ± 0.4*

3.4 ± 0.6

Time to peak force (ms)

774.3 ± 47.5*

237.4 ± 4.5

Time to half of relaxation (ms)

914.0 ± 45.2*

278.5 ± 8.2

Maximal rate of rise (mN/mg/ms)

0.04 ± 0.2*

0.21 ± 0.3

Maximal rate of fall (mN/mg/ms)

0.03 ± 0.1*

0.14 ± 0.2

Size of atrial tissues (mg)

6.71 ± 0.4

6.90 ± 0.6