F. J. VEITH, S. B. P. SINHA, S. S. SIEGELMAN AND J. W. C. HAGSTROM 
441 
Figure 3. — Right posterior oblique projection of arterial 
phase of an angiogram performed 17 months after 
autotransplantation of the left lung and ligation of 
the right pulmonary artery. Notice that there is no 
flow through the right pulmonary artery and that 
there is moderate dilatation of the left main pulmo- 
nary artery and its major branches. The site of arterial 
anastomosis cannot be identified. 
in dogs which died within the first month have 
been described previously.^ Although many le- 
sions were present in some of the transplants of 
dogs which died during this period, many 
showed no structural abnormality, and exam- 
ples of histologically normal areas could be 
found in the transplanted lungs of dogs which 
died at all times during the first postoperative 
month. 
In the two dogs that died four and 12 months 
after operation, the autotransplanted lung was 
grossly and microscopically normal (Figure 5) 
except for focal atelectasis. Two dogs that died 
three and six months after operation had exten- 
sive pneumonia in the right lung with areas of 
infarction. The transplants in these dogs were 
normal except for traces of pulmonary edema. 
The dogs that died of unknown causes after 19 
and 30 months had grossly normal lungs bilat> 
erally. Microscopically, the transplanted lungs 
were normal except for minimal congestion 
(Figure 6) . 
DISCUSSION 
The present results show that with meticu- 
lous surgical technique it is possible to achieve 
survival after left lung transplantation and im- 
mediate right pulmonary artery ligation in ap- 
proximately fifty per cent of dogs subjected to 
Figure 4. — Representative views of the arterial, capil- 
lary, and venous phases of an angiogram performed 
on a dog 22 months after autotransplantation of the 
left lung and ligation of the right pulmonary artery. 
All views are in the right posterior oblique projec- 
tion. Except for dilatation of the major arteries of 
the left lung, no abnormalities are present. No con- 
trast agent entered the right pulmonary artery. 
