“…Williamson 2 reported similar conclusions as to the exceedingly great risk in the danger of collapse and sudden death of pregnant women with heart disease after delivery following the introduction of bougies. Mac¬ kenzie,3 Pardee,4 Wilson and Herrmann, 5 Robinson,9 Oliver,7 Hay and Hunt, 8 Jensen,9 Zinsstag,10 von Jaschke,11 and especially Lennie 12 in England, Sachs 13 in Germany and Hamilton and Kellogg 14 in this country, have reported extensive and important clinical studies. CRITERIA In any study such as this, it is desirable to state clearly our conception of what the general term "heart disease" embraces.…”