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The cause of arteritis is unknown in many instances, but parasitic invasion and contiguous involvement of vessels in some inflammatory injuries are etiological factors. Symptomatology. A characteristic type of lameness signalizes iliac thrombosis and the following brief abstract from a contribution on this subject by Drs. L.A. and Dr.
In large trunks, by diminishing the elasticity of the vessel wall, they are liable to lead to the formation of aneurysm. Changes in the arterial walls closely resembling those of syphilitic arteritis are sometimes met with in tuberculous lesions.
Anatomy INJURIES OF ARTERIES: Varieties INJURIES OF VEINS: Air Embolism Repair of blood vessels and natural arrest of hæmorrhage HÆMORRHAGE: Varieties; Prevention; Arrest Constitutional effects of hæmorrhage Hæmophilia DISEASES OF BLOOD VESSELS: Thrombosis; Embolism Arteritis: Varieties; Arterio-sclerosis Thrombo-phlebitis Phlebitis: Varieties VARIX ANGIOMATA Nævus: Varieties; Electrolysis Cirsoid aneurysm ANEURYSM: Varieties; Methods of treatment ANEURYSMS OF INDIVIDUAL ARTERIES.
Syphilis plays an important part in the production of aneurysm, probably by predisposing the patient to arterio-sclerosis and atheroma, and inducing an increase in the vascular tension in the peripheral vessels, from loss of elasticity of the vessel wall and narrowing of the lumen as a result of syphilitic arteritis.
In some cases the vessel wall is softened by arteritis especially the embolic form so that it yields before the pressure of the blood. Repeated and sudden raising of the arterial tension, as a result, for example, of violent muscular efforts or of excessive indulgence in alcohol, plays an important part in the causation of aneurysm.
As judged by lesions of the aorta and iliac arteries in dissecting subjects, the conclusion that arteritis and resultant disorders are of rather frequent occurrence, is logical. Etiology. Inflammation of the vessel walls and resultant prolifieration of tissue together with the accumulation of clotted blood becoming organized, serve to obstruct the lumen of the affected artery.
Sclerostomiasis with attendant arteritis, thrombus formation and subsequent lodgement of emboli in the iliac, femoral, or other arteries, causes sufficient obstruction to prevent free circulation of blood, and the characteristic lameness of thrombosis results. Indirect injury to vessels may occur because of contused wounds and subsequent inflammation of tissues supplied by such vessels.
#Sacculated Aneurysm.# When a limited area of the vessel wall is weakened for example by atheroma or by other form of arteritis this portion yields before the pressure of the blood, and a sacculated aneurysm results.
#Arterio-sclerosis# or #Chronic Arteritis#. These terms are applied to certain changes which result in narrowing of the lumen and loss of elasticity in the arteries. The condition may affect the whole vascular system or may be confined to particular areas.