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Fig. 6. Relationship between heart rate (fH) and preload
pressure (Pin), cardiac output
(
), power output of the heart (mW
g-1)and stroke volume (VS) in the hearts
perfused with Ringer saline and zatebradine (1 mg ml-1). Values are
means ± S.E.M. (N=5). Asterisks indicate
significant difference from the control value (at 60 beats min-1)
(P<0.05).
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