L. N. COTHRAN, E. W. HAWTHORNE AND H. SANDLER 
565 
and the other by Carl, where screws were in- 
serted into the endocardial surface. These meth- 
ods, which supposedly "don't interfere with the 
wall with the wire coming through and prob- 
lems with scarring," demonstrated findings 
identical to those presented here, which really 
substantiates that the methods used here are 
quite accurate. 
