310 
SURGERY AND TRANSPLANTATION 
1 1 
II 
I 
Figure 12. — Regional Denervation of the Canine Heart. 
Rt. Lateral View of Heart 
parasympathetic innervation of AV node; rt.-sided 
origin. 
the same age and weight which standardized 
our procedure. 
We next looked at the different implantation 
procedures we were using for different pur- 
poses. We used the traditional cardiopulmonary 
bypass, particularly to evaluate a new heart 
when we're not sure of the fit and we may need 
a lot of time to get it in. The most exciting pro- 
cedure, introduced by Dr. Jun Kawai of Japan, 
is deep hypothermia. We've had our greatest 
success with implanting the heart under deep 
hypothermia. 
If I may have some slides, I'll briefly show 
you. Before we put the heart in, we like to test 
it extensively. We have long-term and short- 
term testing. This is an artificial heart and the 
curve shows cardiac output and filling pressure. 
This - next slide shows the Kwan-Gett hemi- 
sphere of the left heart. We have two sets of 
curves ; the zero vacuum is here at the dotted 
lines, and on this curve we have a vacuum ap- } 
plied to the diaphragm. You can see how this i 
shifts the curve from the right to the left. We j 
feel it is better to do this because if you put a j 
heart in and it doesn't work, you've lost a lot f 
of money. j 
Next slide, please. This is a Donovan spherical ( 
heart that can pump up to about 14 liters, and 
you can see how the hearts differ. This is a 
different design with different characteristics. 
When we have this information, we can put the I 
heart in, using fewer translucents. 
May I have the next slide ? This is a hematic 
of our most successful implantation procedure, 
