Key result
Cold adaptation in the crucian carp heart slows contraction kinetics and increases twitch duration, preconditioning the cardiac muscle for low energy supply during winter anoxic conditions.
Population
Crucian carp (Carasius carassius) atrial and ventricular muscle
Design
Preclinical
Authors
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No immediate clinical implications for human cardiology; extends comparative insights into anoxia-tolerant cardiac adaptations.
Cold acclimation slows contraction kinetics in the crucian carp heart, preconditioning it for low energy supply during winter anoxia, with excitation-contraction coupling relying exclusively on extracellular calcium.
Tittu et al. (2001) studied this question. Cold adaptation was evaluated on Contractility and twitch duration. Cold adaptation in the crucian carp heart slows contraction kinetics and increases twitch duration, preconditioning the cardiac muscle for low energy supply during winter anoxic conditions.
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