Atherosclerosis

“ There can be no doubt that when these conditions are recognized long before symptoms would naturally supervene, men and women would not only live longer but also die more comfortably and many very likely would be carried off by some disease having no relationship whatever to arteriosclerosis. Slight enlargement of the heart downward and to the left, accentuation of the second aortic sound at the base, a full pulse, arteries which are palpably thickened, increased blood pressure are signs to which attention must be paid. ”

“ Hardening of the arteries, or arteriosclerosis, is a complication with which older diabetic patients are frequently afflicted. As has been said, arteriosclerosis may be a cause of diabetes in a predisposed person, but be that as it may, diabetes, once established, unless controlled, aggravates and intensifies [Pg 57] disease of the arteries. It is, therefore, important for the older diabetic patient to make a serious effort to avoid arteriosclerosis by keeping his diabetes checked. Most of the complications which harass and endanger the older patient are due to hardening of the arteries. ”

“ Arteriosclerosis is not an acute process. In its very nature, it is of months' or years' standing, the specific changes are of slow growth, and more in the nature of degeneration. It would seem that a very careful study of the histories of those with arteriosclerosis and a final examination upon the actual tissue might eventually give us data for the etiology.
The most frequent site of disease in these experimental lesions is the thoracic aorta, and it is there also that the most severe changes are seen. ”

“ These symptoms of early arteriosclerosis are the result of slight [184] and variable disturbances in the circulation of the various organs. Normally there are frequent changes in the blood pressure in the organs, but the vasomotor control of normal elastic vessels is so perfect that no symptoms are noted by the individual. When the arteries are sclerosed, they are less elastic and the blood supply is, therefore, less easily regulated. At times symptoms occur only after effort. The patient may tire more readily than he should for a given amount of mental or bodily exercise ”

“ Simple atheroma must not be confused with the lesions of arteriosclerosis. The small whitish or yellowish plaques so frequently seen on the aorta and its main branches, may occur at any age, and have seemingly no great significance. Such plaques may grow to the size of a dime or larger, and even become eroded. They represent fatty degeneration of the intima which, at times, has no demonstrable cause; at times follows in the course of various diseases, and undoubtedly is due to disturbances of nutrition in the intima. ”

“ These arteries are probably the most important ones of our body, for they provide the muscles of the heart with the nourishing blood without which they could not do their work. It is the sclerosis—the hardening—of these arteries which, causing an obstacle to the passage of the blood, is the most frequent cause of rapid death in arteriosclerosis, often in comparatively young people. It is a sad fact, that such a condition, as so often is the case with arteriosclerosis, can exist without exhibiting any marked symptoms of it being present. ”

“ That is to say, it is the attempt on the part of the body to equalize the distribution of blood in the body when there is some poison causing constriction of the small arteries. In this sense hypertension is not only essential, but actually life-saving. A heart which is so diseased that it can not respond to the call for increased action by hypertrophy of its fibers, would shortly wear out. The very fact that the heart becomes enlarged and the tension in the arteries becomes high, indicates that in such a heart there was great reserve power. ”

“ We know that organs exposed constantly to hard work undergo hypertrophy, and that the blood tension in those organs is high. Blood tension is, after all, dependent on capillary resistance, and if the capillaries are distended with blood, the resistance is great. The digestive organs can be no exception to this rule. Increased work means an increase of blood. This inevitably causes distension of the capillaries with stretching of the arteries and consequent damage to the walls. Once arteriosclerosis is present a vicious circle is established. ”

“ Phlebosclerosis not infrequently occurs with arteriosclerosis. It is seen in those cases characterized by high blood pressure. Such increased pressure in the veins is due, for example, to cirrhosis of the liver which affects the portal circulation, or to mitral stenosis which affects the pulmonary veins. The affected vessels are usually dilated. The intima shows compensatory thickening especially where the media is thinned. As a rule all the coats are involved in the connective tissue thickening. Occasionally hyaline degeneration or calcification of the new-formed tissue is seen. ”

“ Our conception of arteriosclerosis as a degenerative process affecting the vascular tree rather than a disease, removes the possibility of discussing special symptoms. As a matter of fact, we know of very few organs where even profound pathologic changes in the vascular system produced during life any symptoms which could be laid to these arterial changes. Kind nature has given to us such an excess of organs of every kind that the destruction of large portions of any organ seems to affect the function but little. ”

“ Most cases of arteriosclerosis sooner or later present symptoms referable to the heart. When the organ is hypertrophied and is already working against an enormous peripheral resistance, a slight excess of work put upon it may cause a dilatation of the chambers with the resulting broken compensation. There is dyspnea on slight exertion, possibly some precordial distress, slight edema of the ankles and lower legs and possibly scanty urine. With proper care, a patient with such symptoms may recover, but the danger of another break in compensation is enhanced. The next attack is more severe. ”

“ Cases are known where persons of ninety years even had soft arteries, and we have seen persons of eighty whose arteries could not be palpated. When infants and children are seen with considerable sclerosis, it proves that, after all, it is the quality of the tissue even more than the wear and tear, that is the determining factor in the production of arteriosclerosis. It would be well if those who can not bring healthy progeny into the world were to leave this duty to those who can. ”

“ The retrogressive changes of advancing years can not be rightly termed disease, yet it becomes necessary to regard them as such, for the senile changes, as we shall see, may be but the advanced stages of true arteriosclerosis. Much depends on the nature of the arterial tissue and much [33] on the factors at work tending to injure the tissue. A man of forty years may therefore have the calcified, pipe stem arteries of a man of eighty. Our parents determine, to great extent, the kind of tissue with which we start life. The arteries are elastic tubes capable of much stretching and abuse. ”

“ Yet how often does it happen that individuals, apparently in the best of health, suddenly succumb to an asthmatic or uremic attack, an apoplexy, cessation of the heart beat, or a rupture of the heart due to arteriosclerosis!
In order to arrive at an intelligent opinion in regard to prognosis certain factors must be taken into consideration, chief of which are: the seat of the sclerosis; the probable stage; the existing complications; and, last and most important, the patient himself. The whole man must be studied and even then our prognosis must be most guarded. ”

“ It is fortunate for the arteriosclerotic that mild grades of the disease are compatible with a fairly active life. The disease in this stage may become arrested and the patient may live many years. Not only in the mild grades is this possible. Even patients with advanced sclerosis may enjoy good health provided the organs have not been so damaged as to render them unfit to perform their functions. The frequency with which we see advanced arteriosclerosis at the postmortem table as an accidental discovery, attests the truth of the foregoing statement. ”

“ Hence the clinical measuring of the pressure in the brachial artery alone is not sufficient for a diagnosis of arteriosclerosis. A persistent high blood pressure even with normal urinary findings is not a sign of arteriosclerosis. The high tension later may lead to the production of sclerosis of the arteries, but in these cases the kidney may be primarily at fault.
The impression must not be gained that hypertension in [186] itself always constitutes a disease or even a symptom of disease. Hypertension itself is practically always a compensatory process. ”

“ Arteriosclerosis of the aorta, of the coronary arteries, or of both, is practically always found in cases dying of various cardiac irregularities other than those the result of rheumatic cardiac lesions. It is not that arteriosclerosis causes the cardiac lesions (although the thickening of the walls of the coronary arteries does interfere mechanically with the nutrition of the heart muscle) , but the arteriosclerosis is a part of the tissue reaction in the arteries to some set of causes affecting the whole body. ”

“ A warning should be sounded, however, against over exercise. This leads naturally to hypertrophy with all its disastrous possibilities. Men who have been athletes when young should guard against overeating and lack of exercise as they grow older. Many of the factors which favor the development of arteriosclerosis are already there, and a sedentary, ordinary life, such as office all day, club in afternoon, a few drinks and much rich food, will inevitably lead to well-advanced arterial disease. ”

“ It is evident from what has been said that an accurate prognosis in arteriosclerosis is no easy matter. Were arteriosclerosis a simple disease of an acute character there might be grounds for giving a more or less definite prognosis. The most that can be said is that arteriosclerosis is always a serious disease from the time that symptoms begin to make themselves known. The gravity depends altogether on the seat of the greatest arterial changes, and is necessarily greater when the seat is in the brain than when it is in the legs or arms. ”

“ No applicant who has palpable arteries or hypertension can be considered a first class risk. It can not be denied that men with arteriosclerosis live to an advanced age and may even outlive those who have apparently normal arteries, but the average life expectancy at any age for an arteriosclerotic is less than that for a normal person. The apparently healthy applicant who learns for the first time when examined for life insurance that he has the early or moderately advanced signs of arterial disease, should thank the agent and examiner for showing him the danger signals ahead. ”

“ The opinion that arteriosclerosis is due in large part to poisoning by end products or by-products of protein digestion is now receiving much support. Experiments on dogs and rabbits have lent some confirmation to chemical observations. It has been shown that dogs fed for a long time on putrefied meat developed inflammation and degeneration of the adventitia and media, with hyperplasia and calcification of the intima of many arteries. In the pulmonary and carotid arteries, in the vena cavas and myocardium, there were extensive necroses and hyaline degeneration. ”

“ To infer the stage of the disease from the feeling of the sclerosed artery, may lead to serious mistakes. Persons with calcified arteries may be perfectly comfortable, while those with only moderate thickening may have many severe symptoms. The keynote is individualization. It is manifestly absurd to treat the laboring man with his arteriosclerosis as one would treat the successful financier. The habits, mode of life, every detail, should be studied in every patient if we expect to gain the greatest measure of success in the treatment. ”

“ The general condition of the patient, his build, physical strength, powers of recuperation, etc., must be taken into account in giving a prognosis. The more powerful the individual, the more favorable, as a rule, is the prognosis, with this reservation always in mind, that the greater the body development, the greater is the heart hypertrophy, and the accidents from high tension must not be overlooked. Many puny individuals with stiff, calcified arteries go about with more ease than a robust man with thickened arteries only. ”

“ It is true when one boils down the question to its last analysis, general arteriosclerosis may mechanically so interfere with the blood supply to tissues that the tissue is thrown out of function either in the reduction or even loss of function. So it may be that occasionally the arteriosclerosis in the arteries supplying the heart is really responsible for the cardiac irregularity. The past few years have been fruitful ones in increasing our knowledge of the various irregularities of the heart. ”

“ Red meat contains more of the substances producing purin bodies than any other one common foodstuff, and for this reason the excessive meat eater is, ceteris paribus, more apt to develop arteriosclerosis comparatively early in life.
The fats and carbohydrates contain practically no substances that react on the body of the ordinary individual in a deleterious manner during their digestion. The extra work that is put on the heart by the formation of many new blood vessels in adipose tissue is the only harmful effect of overindulgence in these foodstuffs. ”