File:Albany medical annals (1914) (14596190907).jpg

Identifier: albanymedicalann3519medi (find matches)
Title: Albany medical annals
Year: 1914 (1910s)
Authors: Medical Society of the County of Albany (N.Y.) Albany Medical College. Alumni Association
Subjects: Medicine
Publisher: Albany, N.Y. : Burdick & Taylor
Contributing Library: The College of Physicians of Philadelphia Historical Medical Library
Digitizing Sponsor: The College of Physicians of Philadelphia and the National Endowment for the Humanities

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HENRY HUN AND CLINTON B. HAWN 17 attached only to the origin of the aorta, from which it hangssuspended. The aorta at its commencement is arched back-wards and when it is suddenly over-distended with blood, ittends to straighten itself and thus the lower end of the at-that-instant-rigid heart is tilted forward striking the chest wall; allthe more so as the contracting ventricle has grown smaller, lessbulging, and the better allows of this. A cardiogram taken atthe apex, therefore, represents the action of the aorta as muchas, or more than, it does the action of the ventricle. In thecase of a normally elastic aorta and a fairly normal cardiacmuscle and no aortic obstruction or mitral leak and when theapex beat is not very powerful, the cardiogram exhibits anabrupt rise, a short horizontal line and an abrupt fall; such asmay be seen in tracing No. C-4. But even under such normalconditions the cardiogram will be greatly modified by the thick-ness of the chest wall, the relation of the ap

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