156 



PHYSIOLOGY OF INDUCED HYPOTHERMIA 



40 



30 

 20 

 10 



0- 

 100 

 75 

 50 

 25 



0- 

 10 



5 



0- 



10 



8 



6 



4 



2 



0- 



1.5 



100 

 50 

 37 



LEFT MAIN CORONARY FL0\^ 

 CC/MIN 



AORTA MM. HG. 



PA. CM. HgO 



R.A. CM H2O 



as CARDIAC OUTPUT l/miN 

 0- 



HEART RATE 

 36 35 



34 33 32 31 30 



BLOOD TEMPERATURE °C 



29 



28 



27 



Fig. 1. — Hemodynamic data during cooling obtained from continuous, simultaneous record- 

 ings. All pressures are electrically determined means. Cardiac output measured by Potter Elec- 

 troturbinometer. Coronary flow measured by rotameter. Dog weigbt 23.2 kg. 



