152
D. J. RANDALL
0.05 005 0.05 0.05 005
0
2
4 6
8
1 0 1 2
Input pressure ( m m Hq)
001 001 001 001 001
0
2
4
6
8
1 0 1 2
Input pressure (mm Hg)
001 001 001 001 001
- 010
-
P
," 008
-
E
w 006
-
- 5
2 004
9 002
z
a l
x
0
2
4
5
8
1 0 1 2
Input pressure (mm Hq)
0
2
4
6
8
1 0 1 2
Input pressure ( m m Hg)
I i \ , , , . . ,
0
2
4
6
8 0 1 2
Input pressure (mm Hq)
Fig. 7. Heart function curves showing the effect of increasing the input pressure
on five cardiac variables at two epinephrine concentrations at 6°C: ( 0 ) 0.01 pg/ml
epinephrine in saline; ( A ) 0.1 pg/ml epinephrine in saline. The experiments were
carried out on the i n uitro trout heart, Salmo gairdneri. The arrows above the graphs
indicate the range over which the pairs of values are significantly different. Each
point on each graph is a mean of seven values. From Bennion (1968).