In addition to this enlargement of the heart, or perhaps associated with it, there is a combination of signs which has been termed “the cardiorespiratory syndrome” (Hess). It will be noted in the above description of a case of subacute scurvy, that the pulse- or heart-beat was frequently over 150, and the respiration 60. These phenomena were noted in several instances before their significance and intimate relationship to scurvy were realized. The heart-beat not infrequently is found to be 200 per minute, and to be characterized by marked lability—increasing to an astonishing degree as the result of slight exertion or excitement. A mild febrile disturbance causing a rise of temperature to little more than 100° F. will send the pulse-rate up 30 beats. It must not be thought that this refers to severe cases; the babies we have in mind are similar to the one cited as an instance of subacute scurvy. Apparently they are not ill, but show merely some tenderness of the thighs, pallor, and the other minor signs described. The cardiographic tracings showed a simple tachycardia with an exceptionally tall T-wave in some tracings, such as is commonly seen in exophthalmic goitre (Fig. 22).
Fig. 22.—Electrocardiogram in case showing cardiorespiratory syndrome. Tachycardia with exceptionally tall T-wave.
The rapidity of respirations is perhaps a more delicate indicator of this disturbance than the pulse and has been found to be markedly affected when the latter was merely slightly increased in rate. For example, in one instance the respirations were 64, 60 and 64 on three successive days, while the pulse was 124, 141 and 136; in other words, there was a 2:1 instead of the normal 4:1 pulse-respiration ratio. The accompanying chart ([Fig. 15]) illustrates the phenomenon in all its details better than a verbal description. There is one point in connection with it, to which especial attention should be called. This is a reaction evident at a glance at the chart—the sharp drop in the pulse and in the respiratory rate when orange juice was given. It is the essence of the phenomenon; a therapeutic response which proves that the rapidity is scorbutic in nature.
The main involvement of the respiratory system in scurvy is the polypnœa just described in connection with the cardiorespiratory syndrome. There is no aphonia, a sign so typical of adult and of infantile beriberi, although at times the voice is abnormal and whining. The lungs frequently show some dullness posteriorly, which may be due to engorgement or to the pressure of the enlarged heart. Pneumonia is a frequent complication and edema a terminal event. Hydrothorax associated with hydropericardium is of frequent occurrence, and was noted in the early description of this disease in adults and in the first account of Barlow. These effusions rarely progress to what may be termed the clinical degree and under antiscorbutic treatment are rapidly absorbed.
It is commonly thought that scurvy does not involve the nervous system; that this is a feature which distinguishes it sharply from beriberi, another “deficiency disease.” This view is incorrect, for the nervous system is probably affected in many cases of scurvy. The rapidity and lability of the pulse, combined with the rapid respirations, would seem to be due to a disturbance of the vagus mechanism. It is true that in beriberi the vagus is involved to a still greater extent, especially its recurrent laryngeal branch which brings about the characteristic aphonia. In scurvy the knee-reflexes are generally increased. Very rarely they are absent in infantile scurvy, as described in adults. It is impossible to judge whether the pain and tenderness in infants are due in part to a sensitiveness of the nerve trunks as well as of the periosteum. Careful studies in adult scurvy should furnish an answer to this question. No methodical examination for areas of anæsthesia or paræsthesia, signs which occur so frequently in connection with beriberi, has been carried out in scurvy. In certain epidemics, however, pains in the limbs have been prominent symptoms.
The optic discs are generally pale in both infants and in adults, with occasional signs of neuredema. Nyctalopia, so frequently encountered, must be regarded as a circulatory symptom rather than as one of nervous origin.
In a recent paper the author described a focal degeneration of the lumbar cord in a case of infantile scurvy, the lesion involving mainly the anterior horn cells ([Figs. 3] and [4]). In view of this report it would be well to watch for corresponding clinical signs of involvement of the spinal cord. Herpes has been described in connection with both adult and infantile scurvy. In one of the early cases in the American literature Fruitnight reported a case with herpes in a girl five years of age. In considering the rôle of the nervous system, mention should be made of cases where sweating constituted an important symptom. Finkelstein lays particular stress on this symptom in infantile scurvy. We have not met with it frequently; possibly it is due in part to complicating rickets.
As would be expected, the nervous system is at times the site of hemorrhage. Such lesions cannot, however, be considered essentially nervous. For instance, hemorrhage into the meninges may occur, as in the case of Sammis, where there was “a general clonic convulsion” before death, and a blood-clot 2½ inches long by ½ inch wide was found at necropsy between the dura and arachnoid. Fife reported a similar case. Finkelstein also has drawn attention to the occurrence of meningeal hemorrhage, and Hess and Fish reported obtaining bloody cerebrospinal fluid from a case with meningeal symptoms. Recently Aschoff and Koch have depicted hemorrhages in the sheath of the sciatic nerve, which undoubtedly must have given rise to symptoms during life.
In view of many of these symptoms, especially those involving the vagus, scurvy must be looked upon as a disorder which may seriously affect the nervous system. Furthermore, when we note the marked reaction brought about by the antiscorbutic vitamine—for example, the sharp fall in the rate of respirations and of pulse, as shown in [Fig. 15], after giving orange juice, we must conclude that the antiscorbutic vitamine functions, at least indirectly as an antineuritic vitamine—that it must possess this character to allay the various nervous signs of this disorder.