Increased ventricular stiffness and decreased cardiac function in Atlantic cod (Gadus morhua) at high temperatures.

  title={Increased ventricular stiffness and decreased cardiac function in Atlantic cod (Gadus morhua) at high temperatures.},
  author={Douglas A Syme and A. Kurt Gamperl and Gordon W. Nash and Kenneth J. Rodnick},
  journal={American journal of physiology. Regulatory, integrative and comparative physiology},
  volume={305 8},
We employed the work loop method to study the ability of ventricular and atrial trabeculae from Atlantic cod to sustain power production during repeated contractions at acclimation temperatures (10°C) and when acutely warmed (20°C). Oxygen tension (Po2) was lowered from 450 to 34% air saturation to augment the thermal stress. Preparations worked under conditions simulating either a large stroke volume (35 contractions/min rate, 8-12% muscle strain) or a high heart rate (70 contractions/min, 2-4… CONTINUE READING
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