[The work capacity of the isolated rat heart after prolonged hypothermic total ischemia].

The dynamics of the tolerance of the rat isolated heart of ischemia at 9 degrees C approximated that of the heart tolerance in situ following the cardiac arrest due to the rat organism immersion hypothermia in water at 9 degrees C. An increase of the Ca concentration or addition of adrenaline to the perfusate induce a relative increase in the heart mechanical capacity.