. Medical diagnosis for the student and practitioner. Fig. 388.—Type of aortic insufficiency with dilatation of the aorta. increase the rate of its contractions, and so expand its cavity as to enableit to pump rhythmically into the aorta the amount of blood necessary tomaintain an adequate blood supply for the body tissues and brain centers,in addition to that which is lost through the abnormal diastolic backflow from Sharp drop inpressure. Ventriculardilatation. Ventricularcavity mustenlarge. 7H MEDICAL DIAGNOSIS Varied pathologiccases. that vessel into the ventricle. By a forced increase of
. Medical diagnosis for the student and practitioner. Fig. 388.—Type of aortic insufficiency with dilatation of the aorta. increase the rate of its contractions, and so expand its cavity as to enableit to pump rhythmically into the aorta the amount of blood necessary tomaintain an adequate blood supply for the body tissues and brain centers,in addition to that which is lost through the abnormal diastolic backflow from Sharp drop inpressure. Ventriculardilatation. Ventricularcavity mustenlarge. 7H MEDICAL DIAGNOSIS Varied pathologiccases. that vessel into the ventricle. By a forced increase of tonus it must preventalso a progressive stasis in, and fatal dilatation of, its own cavity. In this simple picture are all of the essential clinical elements of Fig. 389.—Chronic aortic endocarditis with insufficiency. There is thickening andretraction of leaflets and vegetative thrombi adherent both to the central portions ofleaflets and the ventricular endocardium. The left ventricle is markedly dilated and heartis hypertrophied. Case is that of man, age, 39, who was admitted to hospital because ofcough, weakness and orthopnea. Clinical examination showed dilated heart and a Corriganpulse in right radial but absent in the left. At autopsy, heart weighed 675 grams. Therewas also thrombosis of right auricular appendage, embolism of left radial artery at elbow,and both recent and old infarction of spleen and kidneys. {Dept. of Pathology, Universityof Minnesota. Courtesy of H. E. Robertson, Director.) • The lesion may represent the effects of endocarditis, acute, chronic,simple or malignant; sclerosis of the cusps, cardiosclerosis, acute physicaloverstrain or myocarditis, myasthenia and myocardial degeneration of anytype. AORTIC INSUFFICIEN
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectdiagnos, bookyear1922
