A Jewish woman, aged 22, consulted us May 4, 1936, because of some uncertainty about the significance of chest pain occurring eight days before. She had always been in excellent health except for scarlet fever at the age of 10 years and tonsillitis followed by tonsillectomy at 12. She had worked hard and played tennis without any symptoms. At the time of the occurrence of the pain she was at the end of the second month of her first pregnancy. There had been no evidence of infection or of an attempt to interrupt the pregnancy.
Her father, mother, four sisters and one brother were alive and well.
April 26, on getting out of bed, she had been seized by a moderate paroxysm of coughing, which was at once followed by a rather severe oppressive pain across the front of the upper part of the chest, radiating equally down the two arms to