The sphygmograph and the physiology of the circulation : a monograph read before the Medical Society of New Jersey, upon investigations made preparatory to a larger work on the practical value of the sphygmograph . Do. with Excitement. 3rd.—Aortic Regurgitation. Where insufficient closure of the aortic semilunar valvesoccurs, features are presented quite distinct from those de-scribed ; thus, the term collapsing is peculiarly applicable tothe pulse in this disease, which seems suddenly to yield under 24 THE SPHYGMOGRAPH, the pressure of the finger. The stroke is quick, as if indica-tive of som
The sphygmograph and the physiology of the circulation : a monograph read before the Medical Society of New Jersey, upon investigations made preparatory to a larger work on the practical value of the sphygmograph . Do. with Excitement. 3rd.—Aortic Regurgitation. Where insufficient closure of the aortic semilunar valvesoccurs, features are presented quite distinct from those de-scribed ; thus, the term collapsing is peculiarly applicable tothe pulse in this disease, which seems suddenly to yield under 24 THE SPHYGMOGRAPH, the pressure of the finger. The stroke is quick, as if indica-tive of some local cardiac irritant; it is wide from increasedimpulse, and the apex of the first part of the tracing is sharp;the descent considerable, and the reflex wave, both because ofsuddenly decreased propulsion and greatly increased resist-ance from venous fullness, produces a sharply defined dicro-tism, the line from the second prominence of the tracing itselfdropping suddenly. The latter phenomenon would probablybe impossible were it not for a dissemination, so to speak, ofthe blood back through the half emptied larger arteries ; thecharacteristic curve is therefore as follows, (from a patient):. Aortic Regurgitation. Pulmonary Regurgitation. In this form of disease, concerning which Dr. DeCosta re-murks, very little is known from clinical observation, it wouldbe difficult to form a theory since the pulmonary circulationand the right ventricle are chiefly, perhaps solely, involved,and eccentric hypertrophy is constant. The arteries, moreover, that are accessible for tracings areout of the track of the impaired circulation. The condition, AND THE PHYSIOLOGY OF THE CIRCULATION. 25 however, in which a murmur exists at the third left costalcartilage, near the sternum, whether with impulse or secondsound and due to disease at the apex of the left lung, a con-dition in fact where pulmonary regurgitation is simulated, butdoes not really exist, gives a tracing characteristic of ob-stru
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Keywords: ., bookcentury1800, bookdecade1870, bookpublishern, booksubjectpulse
