National Geographic : 1950 Feb
What your heart does... The heart is the hardest working organ in the body. It beats about 100,000 times a day, and in the course of 24 hours pumps more than 2600 gallons of blood through the blood vessels. The heart's ability to function normally may be affected if it is subjected to prolonged or excessive strain, or if it is attacked by dis ease. Fortunately, doctors now can What medical science is doing . . Today, medical science has many new tests for the heart. One such development is called angiocardiography,in which an opaque solution is injected into the blood stream. By means of X-ray, the doctor then can study the chambers of the heart, the major blood vessels in the chest, and the lungs. Another technique, in which a WhatYOUcando. . Specialists say that there is a great deal the individual can do to help keep his heart sound and strong. Following the doctor's sugges tions about a daily routine of health ful living may help to avoid heart ailments, or to limit their effect. It is also important to have reg ular physical examinations by a doctor. Such check-ups generally do more than ever before to help the heart if trouble appears. Heart disease is the leading cause of death in our country, and the proportion ofdeaths from this cause has been increasing. Authorities point out, however, that this in crease may be a reflection of the fact that, due to medical progress, more and more people are reaching the later years of life when heart ailments are most likely to occur. small tube is inserted through an arm vein into the chambers of the heart, provides information about the amount of blood the heart is pumping. There are also new exercise tests which furnish knowledge about how the heart functions under strain. These and other advances give the doctor more accurate methods of diagnosing heart trouble than have been possible heretofore. insure that if heart trouble should occur it will be discovered early, when modern methods of treatment will help most to control it. Under good medical care, most people with heart ailments can learn to adjust their lives to the work-capacity of their hearts. By so doing, they are often able to enjoy long and happy lives of nearly nor mal activity. Research on diseases of the heart is increasing. To aid in this work, 148 Life Insurance Companies support the Life Insurance Medical Research Fund which makes grants for special studies in diseases of the heart and blood vessels. Metropolitan Life, Insurance Company (A MUTUAL COMPANY) 1 MAmso' AVENUE, NEW YoRK 10, N. Y. Please send me a copy of your booklet, 20-N, "Your Heart." Street City State iI Sis u.