True cardiac resuscitation has been defined by Fauteux1as "full and durable restoration, in due time to avoid eventual death, of the essential functions of a heart which has lost its power to propel blood and which, in all appearances, is unable to recover spontaneously its effective value as a pump." The same author listed the criteria of true cardiac resuscitation as follows: First, the heart must have ceased functioning as a pump, and, secondly, cardiac function must have been fully and permanently restored and life preserved. With the foregoing criteria in mind, we believe that the case about to be reported may be considered one of true cardiac resuscitation. The case is remarkable in that complete recovery followed cardiac arrest of forty minutes' duration. So far as we have been able to ascertain, such a prolonged period of arrest has been exceeded only in a case reported recently