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Fig. 3. Recovery of cardiac function following 30 min of severe hypoxia, measured
as the percentage recovery of maximum force by ventricular strips
[Gesser, 1977; open circles,
rainbow trout (N=5) and closed circles, carp (N=5)], or as
the % recovery of 
MAX in
in situ trout hearts (Faust et al., 1994; open square, N=8).
Workload during the hypoxic period was similar between studies. The
ventricular strips used by Gesser
(1977) were developing maximum
force, but at a contraction rate (0.2 Hz, 12 contractions
min–1) much lower than measured in vivo
(
50–60 beats min–1). By contrast, the power output
of the hearts used in Faust et al.
(2004) was approx. 1/6th of
maximum. Reprinted with permission from the Journal of Experimental
Biology.
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