Licence: Public Domain Mark
Credit: The study of medicine / by John Mason Good. Source: Wellcome Collection.
Provider: This material has been provided by the University of Massachusetts Medical School, Lamar Soutter Library, through the Medical Heritage Library. The original may be consulted at the Lamar Soutter Library at the University of Massachusetts Medical School.
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![Gen. VI. of firmness has been exerted in vain. In most cases. Spec. 1. , , Sternaigia the })ulse, uui'in^^ this contest, varies but little, yet it is Ti^m''^ sometimes quickened, and sometimes intermits; while. Acute in a few instances, the heart palpitates considerably, pang! though less so than in the chro*iic species. A habit of A habit of return is sooij induced after a few fits have produced! P^^'^*^ *^^® ^'^y '■ ^'^ ^^^^^ *'^ ^^ effected, the action of walking is not necessary for its production, for it will sometimes be brought on by the most trivial circum- stances, as coughing, swallowing, going to stool, or a slight disturbance of the mind. And, in this case, the first species becomes converted into the second. One, says Dr. Heberden, has told me that this complaint was greatest in winter; another, tliat it was aggravated PuLse not by Warm weather; in tiie rest, the seasons were not sus- s^^^j^'^y ^'^ pected of making any difference.* The pulse is not only little affected, as already observed, during the pa- roxysm, but even in the intervals; being, for the most part, only a little quickened, and seldom exceeding eighty strokes in a minute; in one instance, even wlierc the semilunar valves of the heart were afterwards found ossified, and the ossification had extended to the aorta itself, the pulse, though small, never exhihited irregular- ity.! Yet, in a few instances, I have found it not only irregular but intermittent; and intermittent for some Aveeks after the paroxysm had ceased to return. In others it has been strong and vibratory. The cause is very obscure, and the more so as the disease has often been found in persons labouring under different sorts of structural derangement about the heart, or in one or more of the organs of res])iration, to which and hence it has been ascribed, as soon as such derangements have a morbid been discovercd; while, in other cases, nothing of the state of i^inJ seems to have existed. Thus the cartilaginous very differ- . /.,.,, . i -n i cnt organs.portions of the ribs have sometimes appeared ossined on examination after death; sometimes the semilunar valves of the heart; and sometimes the coronary arteries : and * Medical Transactions, Vol. ii. p.Gl. T Id, Letter fiom Dr. Wall, Vol. ill. ji. 16. The ca obscure](https://iiif.wellcomecollection.org/image/b2119662x_studyofmedicine01good_0674.jp2/full/800%2C/0/default.jpg)
