Moreover, for years the child must be carried upstairs; when old enough to take part in games, it must not be allowed to join in any which call for violent exertion, such as cricket, or lawn tennis, nor ride any other than a quiet pony at a gentle pace.
It depends entirely on the parents whether, for the sake of a very great but far-off good, they will strictly observe these rules. The difficulty will not arise on the child's part, for it is not hard for those who have had charge of it from babyhood to bring it up to quiet pursuits and quiet amusements, till it seeks no others, and, like the little cage-bred bird, does not care to emulate the flight of others stronger on the wing.
=Inflammation of the Heart.=--The above remarks do not comprise all that is to be said about heart-affection in early life. _Inflammation_ may attack the investing or the lining membrane of the heart at all ages, may produce in the child the same suffering as in the grown person, and may tend to destroy life in a similar manner. The causes, indeed, which produce heart disease, are far more frequent in the grown person than in the child, and advancing age brings with it changes which, wholly apart from active inflammation, produce grave forms of disease unknown in early life. There is, however, one cause of heart disease which is far more frequent in childhood and early youth than in later life, namely, rheumatism. Eight out of ten of all cases of heart disease under the age of fifteen are of rheumatic origin, and in eighteen out of twenty cases of acute rheumatism under that age, whether slight or severe, the heart becomes more or less involved. Now and then, though rarely, the heart becomes affected in the course of scarlatina, and still more seldom in the course of the other fevers, and every now and then affection of the heart is associated with some other form of inflammation of the chest.
Pain is by no means a constant attendant on it, but fever, more or less considerable, a quickened pulse, and hurried breathing are all but invariable, and one great reason for seeking the immediate help of the doctor is, that his skilled ear may at once detect by the altered sounds the heart-affection at its very outset, and employ the measures calculated to arrest its progress.