File:The medical examination for life insurance and its associated clinical methods - with chapters on the insurance of substandard lives and accident insurance (1905) (14594523509).jpg

Identifier: medicalexaminati00greerich (find matches)
Title: The medical examination for life insurance and its associated clinical methods : with chapters on the insurance of substandard lives and accident insurance
Year: 1905 (1900s)
Authors: Greene, Charles Lyman, 1862-
Subjects: Insurance, Life -- Medical examinations Diagnosis
Publisher: Philadelphia, P. Blakiston's son & co.
Contributing Library: University of California Libraries
Digitizing Sponsor: MSN

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aortic and pulmonary valves, closing sharplyto prevent backflow from the full arteries, produce by their closthe second sound (dup), which initiates diastole. Duringthis, the period of relaxation, the blood that has been a< 1 umulatingin the auricles again pours down through the open mitral amitricuspid valves to till the emptied ventricle-, and JUSl 1next systole the auricle- themselves contract vigorously and ven-tricular contraction immediately follow- (Fig. Practical Application. -Import 1 Mental 1 the auscultator, systole is initiated by tin- first sound and di 236 THE MEDICAL EXAMINATION FOR LIFE INSURANCE. by the second. In his minds eye he sees the cycle of events.Thus with the first sound he sees the ventricles contracting, themitral and tricuspid valves tightly shut, the aortic and pulmonaryvalves freely open, and the blood surging into the pulmonaryartery and aorta. With the second sound he sees an exactreversal of conditions: the aortic and pulmonary valves are tightly
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pIG_ 33.—the Normal Heart in Diastole. The ventricular contraction hasceased, the aortic and pulmonary valves, tightly closed, are shutting off andsupporting the blood column; the ventricles are rilling from the open mitral andtricuspid orifices above. MV, Mitral valve. TV. Tricuspid valve. A v. Aortic valve, pv. Pulmonaryvalve. LA. Left auricle. RA. Right auricle. LV. Left ventricle. RV.Right ventricle. V C S. Vena cava superior. V C I. Vena cava inferior.P Vn. Pulmonary veins. closed, the mitral and tricuspid freely open, and the blood isrushing through them from the auricles above to the ventriclesbelow. Important Deductions.—Any organic valvular murmur thatimmediately follows, replaces, or modifies the normal first sound (sys-tolic murmur) must arise cither from a leakage through the closed I 111 I \ \MI\ VI H >\ < IF Till i II! I valves (mitral and tricuspid) or front an obstruction in those that wshould be freely open (aortu and pulmonary . Hence any organu endocardial

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