| Heart disease is one of the most frequent causes of | | | | do heart disease. One less frequent kind is called |
| death in the United States when persons of all ages | | | | congenital heat disease. It is caused by a fault in the |
| are considered. About twenty out of each thousand | | | | development of the heart before birth. |
| have some kind of heart trouble. About one person | | | | Doctors can now help a patient whose ductus |
| in three or four dies of heart disease. We find with | | | | arteriosus who didn't close, by tying off this blood |
| proper diet and exercise, namely running can lesson | | | | vessel. During a severe infection, such as pneumonia |
| the risks. | | | | scarlet fever or diphtheria, the toxin given off by the |
| People live much longer now, on the average than | | | | germs may weaken the heart muscle. This kind of |
| they did a hundred and fifty years ago. We know so | | | | heart disease differs from most of the others in that |
| much more now, at how running affects the human | | | | it almost always causes trouble only during the main |
| heart, within moderation. The heart is simply a | | | | illness or for a short time thereafter. |
| muscle, needing daily exercise can almost ensure, if | | | | High blood pressure overworks the heart, because |
| there is anything you will not die from, and that is | | | | the left ventricle has to pump against a pressure in |
| any kind of heart disease! | | | | the arteries which is higher than normal. Narrowing or |
| During the ages between ten and fifteen years old, | | | | closing off the coronary Arteries air also a frequent |
| the kind of heart disease called rheumatic fever | | | | cause of heart disease. In this disease, the heart |
| causes more deaths in the United States than any | | | | muscle does not get enough blood though keep it |
| other disease. Between the ages of and twenty-four, | | | | nourished. Syphilis, if not properly treated may |
| only tuberculosis causes more deaths. | | | | carouse heart disease. Infection and ticking of the |
| Rheumatic fever may affect the heart by directly | | | | pericardium keeps the heart from filling or contracting |
| weakening the heart muscle, or by attacking the | | | | properly, much as a very tight glove would make it |
| valves so they get out of shape and doesn't close | | | | impossible for you to close your hand tightly. |
| properly. This allows some of the blood to leak | | | | To take care of your heart you should follow the |
| through and makes extra work for the heart. The | | | | ordinary rules for good health! Even more concern |
| heart will try to make up for this by enlarging, just as | | | | with your heart...now that you know more about it! |
| the muscles in the arm enlarge if they are exercised | | | | Eat the right kinds of foods; get plenty of rest and |
| more. | | | | plenty of exercise! Running is one of the best ways |
| When the heart becomes larger, it also becomes less | | | | to strengthen the heart. The sports needing top |
| efficient and eventually it may be unable to keep up | | | | endurance training will use running to build a strong |
| with all the work it has to do. There is various kinds | | | | heart and to improve their circulatory system. |