A study of patients who developed depression immediately after heart surgery is presented. Nineteen of the twenty patients shared a history of having lost a close object who had died as a result of complications following a minor surgical procedure or illness, or had suffered from a disease similar to the one the patient now had, but for which there had been no surgical help at the time. The patients are compared with other survivors and are discussed in terms of both survival and paradoxical reaction. Almost all of the patients showed quick recovery when these issues were pointed out.