The excellence of this monograph is based on the fact that it records the results obtained by a cardiologist, a physiologist and an obstetrician working together in the same clinic over a period of years. The fundamentals of their work are clearly stated, and the most important details are italicized. The improvement in results which the authors report is undoubtedly due to their close cooperation and to the fact that their basic conclusions are drawn from the results obtained in their own cases over many years. The fundamental rules laid down for the selection of patients with cardiac disease will be helpful to practitioners of obstetrics. These rules unquestionably will prevent many patients who do not have true cardiac involvement from being made heart conscious and will, as well, give practitioners a better understanding of prognosis during immediate and future pregnancies in cases of true cardiac involvement.
The statement that