The consciousness of heart trouble has often a depressing effect on people, whether the trouble be slight or serious. When such people become convinced that the trouble is curable or not serious, their condition at once becomes greatly improved. Cures by faith, whether in drugs, baths, elaborate methods or religion, act by playing upon the mental condition. But our employment of this element in treatment should not be the outcome of blind unreasoning faith in some rite or ceremony, bath or drug, but in the intelligent perception of the nature of the symptoms. The reassurance of the patient of the harmless nature of the complaint goes a great way in curing him. The reassurance that with reasonable care no danger need be feared is extremely helpful. Even in serious cases when there is reasonable hope of recovery or a certain degree of recovery, the encouragement of the patient may and does help forward his improvement.
Heart Remedies and Suggestion.—Probably the best evidence we have for the influence of the mind over the heart in diseased conditions, that is, when there is definite organic change in the heart valves or muscle, is to be found in the history of the many remedies that have come and gone in heart therapeutics during the past generation. Strophanthus, for instance, was very popular a quarter of a century ago, and it seems as though in many cases it not only replaced, but was more efficient than digitalis. How few there are who use it now with confidence, and how general is the impression that it does not affect the heart to any extent! The confidence with which the remedy was given by the physician was conveyed to the patient and he "took heart," as the expression is, and proceeded to get better. Even more striking is the evidence afforded by other remedies. For a while it seemed that cactus provided a heart stimulant and regulator of value. Convalaria also gained a reputation as a heart remedy. Both are now practically abandoned. Here, once more, the real remedy, when these substances were employed, was, undoubtedly, the suggestion to the patient in connection with the regulation of his habits of life, so that his heart got a chance to catch up with its work. There are other remedies with which we had similar experiences.
Even digitalis has had phases of confidence and distrust in it, that are interesting to study in the light of what we now know with regard to the influence of the psyche on the heart. One hears at medical society meetings reports of the favorable action of digitalis within a few hours of its administration. These are not examples of digitalis action, but of mental influence. [{313}] Any heart patient after the first visit of a physician in whom he has confidence is sure to brighten up at once, heart action is ever so much better and symptoms of mental depression, and even of circulatory disturbance, disappear. It is this that has made the study of even the efficiency of digitalis so difficult. There were times when most physicians employed it in rather large quantities for all forms of heart disease. In some heart cases it is absolutely contra-indicated. Fortunately many of the preparations of digitalis used in the past were quite inert, and so no harm was done. The results obtained were psychotherapeutic.
Cardiac Inhibition.—The importance of the role of the nervous system and of the mental influences which control it in all functions is well illustrated by what we have learned during the last half century with regard to inhibition in the animal organism. We used to think that while the nervous system sent down positive impulses—that is, nervous stimuli which brought about the accomplishment of certain activities—it had nothing to do with the stoppage of those activities. Such interference was supposed always to be due to external influences of various kinds, potent for the time, in the organism. We have learned, however, that inhibition is one of the important functions of the nervous system. The idea has now become so familiar that sometimes we are apt to forget how great is its significance. Lauder Brunton, in his article on "Inhibition," set forth its role as we have come to know it.
The recognition of the part inhibition plays in vital phenomena is undoubtedly one of the most important discoveries which have been made in physiology since Harvey discovered the circulation of the blood. It throws light upon an immense number of phenomena previously inexplicable and enables us to form theories of a satisfactory nature about many vital problems. It offers an explanation of the nature of hypnotic states, which is at least as satisfactory as that we have of the action of many drugs.
The nervous mechanism of the heart affords the best and most commonly cited example of inhibitory action, and here it was first studied by Weber and Claude Bernard in 1848. The cardiac ganglia derived from the sympathetic preside over the movements of the organ, and in response to the stimulus of the intra-ventricular blood-pressure cause rhythmical contraction of the cavities. Their action is, however, controlled by the pneumogastric nerve, through which impulses of an inhibitory nature are constantly traveling and acting as a restraining force.
As noted by Lauder Brunton, the late Professor Czermak had a small glandular tumor in close contact with the right pneumogastric nerve and he was able by pressure on this to compress the nerve to any extent he wished, and either "to completely stop the heart or simply retard it." He often performed this experiment so that it is not nearly so dangerous as might be thought. We have some instances, apparently too well authenticated to be doubted, in which the power of the human will to inhibit heart action has been as strikingly manifested as this mechanical disturbance of Professor Czermak. Sometimes these stories of cardiac inhibition through the will are dismissed as unworthy of credence, and doubtless many of them are mere fiction, or have been exaggerated for sensational purposes, but some of them are very suggestive examples of the power of the will over the heart. If only a modicum of such power were to be employed, it would seriously hamper heart action, and it must be the aim of psychotherapy to prevent such inhibition.
At least one instance of voluntary heart inhibition was observed by thoroughly trained and properly accredited scientists. A report of it has been published. As a bit of documentary evidence, on a subject that is usually considered so vague as to be scarcely worth considering, Dr. Cheyne's description of the remarkable power of Colonel Tonshend over his heart should be in the hands of those who wish to influence hearts through minds and wills.
He could die or expire when he pleased, and yet by an effort, or somehow, he could come to life again. . . . We all three felt his pulse first: it was distinct, though small and thready, and his heart had its usual beating. He composed himself upon his back and lay in a still posture for some time. While I held his right hand. Dr. Baynard laid his hand upon his heart, and Mr. Skrine held a clean looking-glass to his mouth. I found his pulse sink gradually till at last I could not feel any, by the most exact and nice touch; Dr. Baynard could not feel the least motion in the heart, nor Mr. Skrine discern the least soil of breath on the bright mirror. Then each of us by turns examined his arm, heart and breath, but could not by the nicest scrutiny, discover the least symptom of life in him. We reasoned a long time about this odd appearance, and finding he still continued in that position, we began to conclude that he had indeed carried the experiment too far; and at last we were satisfied that he was already dead, and were just ready to leave him. This continued about half an hour. . . . As we were going away we perceived some motion about the body, and, upon examination, found his pulse and the motion of his heart gradually returning; he began to breathe heavily and speak softly.
Nor must it be thought that the inhibitory faculty can act only in slowing the heart. Normally a certain amount of inhibition is exercised over the heart's action. If by any chance this should be decreased then acceleration of cardiac activity may take place. Lauder Brunton called attention to that in discussing another phase of pneumogastric function. He said: