. Diseases of the heart and arterial system; Designed to be a practical presentation of the subject for the use of students and practitioners of medicine. other terms applied to it are thecollapsing pulse, the water-hammer pulse, the locomotive pulse^and the pulsus alius et celer. In well-marked cases the fingerlaid upon the radial artery, or upon any other readily accessibleartery for that matter, is suddenly lifted by a large, powerfulpulse-wave, which, advancing swiftly along the vessel, strikes thefinger like a shot or ball, and then instantly recedes. The vessel,in other words, after Ix-i
. Diseases of the heart and arterial system; Designed to be a practical presentation of the subject for the use of students and practitioners of medicine. other terms applied to it are thecollapsing pulse, the water-hammer pulse, the locomotive pulse^and the pulsus alius et celer. In well-marked cases the fingerlaid upon the radial artery, or upon any other readily accessibleartery for that matter, is suddenly lifted by a large, powerfulpulse-wave, which, advancing swiftly along the vessel, strikes thefinger like a shot or ball, and then instantly recedes. The vessel,in other words, after Ix-iiig (piickly distended as quickly collapses,hence the name colla])siiig pulse. It is well shown in the accom-panying tracing (Fig. 54). This characteristic of the pulse is intensified by raising the AORTIC REGURGITATION 299 jDatients hand to a level higher than that of the heart, and thusallowing the force of gravity to hasten the quick recession of thepulse-wave. The quickness of the pulse-wave has thus been dwelt upon forthe purpose of emphasizing the difference between the speed withwhich it travels along the artery, and the frequency with which. Fig. 54.—Sphygmogram of Aoetic by Dr. Edward F. Wells. the individual pulse-waves follow each other. Consequently, afrequent pulse is a rapid or accelerated pulse, whereas a quickpulse is one that strikes the finger suddenly and is not pulse may be both frequent and quick, as in fever, but a quickpulse does not necessarily have to be also a rapid one. In aorticregurgitation, however, the pulse is both sudden and accelerated. In some cases when the arteries have become more or lesssclerotic and tortuoiTS the bounding pulse-wave, seems to lift thevessel from its bed, and hence some writers have spoken of it asthe locomotive pulse. To make the raison detre of this collaps-ing character understood, it is necessary to describe how the valvu-lar disease under consideration modifies pulse-tension. Under
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