ANEURYSM

n. A*n’u?-ri?zm. Gr., avevpyona (from avevpivew, to dilate). Lat., aneurysm a. Fr., anévrysme. Ger., Aneurysm a, Arterienerweiterung, Pulsadergeschiwuist. It.,Sp., aneurism a. Properly, a tumor formed by localized dilatation of an artery through which blood circulates. Such tumors are distinguished 4 their expansive pulsation with each systole of the heart, by a thrill to be felt in them on palpation, and by a bruit heard on auscultation. As they increase in size they produce al tion of adjacent structures and give rise to distre ing sympto by their pre ure on nerves, and their final tendency is to burst and, if a large artery is the seat of the tumor, to cause death. The term is also applied to teleangeiectasis, blood-collections resulting from injury or rupture of arteries, and dilatation or IPSEC REY, of the heart. [P. Vogt (A, 319), A, 323, T. Holmes (A, 364), A, 365, 385.]—Abdominal a. Lat., aneurysm a abdominale. Fr., anévrysme abdominal. Ger. abdomina les Aneurysm a, An a, situated within the abdomen, pecially one of the abdominal aorta. {M'Dowel, “Irish Hosp. Gaz., 1875, p. 29(D).]—Active a. Fr., anévrysme act if (Corvisart]. Dilatation of the heart with hypertrophy. [D, 96.|—Acute a. Lat., aneurysmaacutum, Fr., anévrysme aigu. Ger., acutes Aneurysm a. It., aneurism a acuto. Sp.,aneurismaagudo. A condition in which (as the result of acute endocarditis or myocarditis) ulceration, softening, or the formation of pas takes place in the wall of the heart, and the cavity thus formed communicates with one of the chambers of the heart and becomes converted in to an aneurysmal pouch. {R. Quain (A, 364).|—Acute valvular a. See À. of the valves of the heart.—Anastomotic a., A. by anastomosis. Lat., aneurysm a per an as tomos in. Fr., anévrysme par anastomose. Ger., ästiges Aneurysm a, Ran ken aneurysm a. It., aneurism a per an as tomos i. Sp., aneurism a por anastomésis. 1. J. Bell’s term for a vascular tumor made up of enlarged and proliferated capillaries. [A, 298.] 2. See Arterio-venous a.—A. by dilatation. See Fusiform a.— A. by transfusion. Lat., aneurysm a per transfusionem. It., aneurism a per trasfusivne. See False varicose a.—A. needle, See under Neepie.—A. of the heart. Lat., aneurysm a cord is. Fr., anévrysme du cœur. Ger., Herzaneurysma. It., aneurism a del cuore. Sp., aneurism a del corazon. 1. A depre ion or pouch like cavity formed in the substance of the heart and communicating with one or more of its chambers, in consequence of acute inflammation or chronic degenerative disease. See Acute a. 2. As used hy Lancisi and some subsequent writers, any dilatation of the heart from whatever cause. [R. 364).] See Active a. and Pa ive a.—A. of the internal coat. See Mixed internal a.—A. of the orbit. Lat., aneurysm a orbitæ. Fr., anévrysme de l’orbite. Ger., oat Mn fs ae der Augenhôhle, Orbital aneurysm a. It., aneurism a dell’orbita. Sp., aneurism a dc la érbita, An a. or any pulsating tumor within the orbit or so situated as to pre upon the contents of the orbit. [P. Vogt (A, 319).]—A. of. the outer coat. See Mixed external a.—A. of the valves of the heart. A circumscribed sacculation of one of the segments of a cardiac valve. There are two forms: 1. Dilatation of the whole thickne of the valve. 2. Acute valvular a.; a form due to ulceration through one lamella, in consequence of which the force of the blood current distends the other lamella in the form of asac. These lesions are most common in the mitral valves and, next to those, in the aortic. They usually end in perforation with consequent insufficiency. ‘[B. Foster (A, 364).|—Aortic a. Lat., aneurysm a uorticum. Fr., Geta e aortique. Ger., A or ten aneurysm a. An a, of any portion of the aorta. [Richet (D, 93).|—Arterial a. Lat., aneurysm a arteriale. Fr., anévrysme artériel. An a. of an artery as distinguished from one of the heart or one involving a vein also. [T. Holmes (A, 364); Richet (D, 93).]—Arterio-venous a. Lat., aneurysm a arterio-venosum. Fr, anévrysme artério so-veineux. It., aneurism a arterio-venoso. A general term for varicose a. and aneurysmal varix (g.v.). [T. Holmes (A, 364),]—Axillary a. Lat., aneurysm a axillare. Fr., anévrysme axillaire. Ger., Ach sel aneurysm a. An a. of the axillary artery. (Bégin (D, 96).]—Bérara’s a. See ANÉYRYSME variqueux enkysté veineux.—B a. Fr., anévrysme des os. Syn.: osteo-a., osteoid a. A pulsating tumor of a bone in which the vascular element predominates. It is usually malignant. [Le Fort (D, 92).|—Branching a. See Cirsoid a.— Capillary a. See Miliary a.—Cardiac a. See A. of the heart. Cire am scribed a. Lat., aneurysm a cir cum scrip tum. Fr., anévrysme circonscrit. An a. (either true or false) in which the contents are still within the artery, although one or two of its coats may have ruptured. [Le Fort (D, 92).]—Cireumseribed false a. Fr., anévrysme faux circonscrit (ou consécut if). See Consecutive a—Cireumseribed false primitive a. Fr., anévrysme circon- Ga ase primitif. See Circumscribed a.—Circumscribed traumatic a. Fr., anévrysme traumatique circonscrit. A traumatic a, in which the blood that has escaped from the artery.has become circumscribed by an exudation of I; mer Ave R. Beaumont, * Med. Times and Gaz.,” 1867, ii, p. 87 (D).\_Cirsoid a. Late aneurysm a cirsoideum (seu spongiosum). Fr., anévrysme cir soïde (ou à bo elures). Ger., ästiges Aneurysm a, Ran ken aneurysm a. It., Sp., See A2n-u?2-ri2z’ma?l, aneurism a cirsoideo, r è Syn. arterial varix. racemose (or racemose arterial) A tumor-li a. € collection of dilated and elongated arteries. [A, 365.]-Compound a. See Mixed a.—Consecutive a. Fr., anévrysme consécut if. A collection of blood that has been extravasated in consequence of the rupture of an a. or a wound of an artery. [Le Fort (D, 92).)—Consecutive diffused a. Fr. anévrysme diff us consécut if. A consecutive a. in which the effused blood has not become circumscribed. [Moquin, “Gaz, méd. de Lyon,” xviii, 1866, p. 184 (D).|—Crateriform a. Fr., anévrysme cratériforme. A lateral a. so shaped that it is largest where it springs from the artery. [L, 15 Cupuliform a. See Cystogenic a.—Cylindriform a., Cylindroid a. Lat., aneurysm a cylindroideim, Fr.,anévrysme cylindroide. Ger., cylindroides neurysma. It., aneurism a cilindriforme (o cilindroide). One in which the dilatation is uniform for a considerable extent. [A, 314.1—Cystic a. Fr. anévrysme kysteux. Corvisart and’ Cruveilhier’s term for a sacculated a. (q. v.). [Richet (D, 93).J— Cystogenic a. Fr., anévrysme Kystogénique. It., aneurism a cistogenico. An a. arising from the poe of a cyst into the lumen of an artery, [Broca (L, 44).|—Diffuse a., Diffused a. Lat., aneurysm a diffusum (seu illimitatum). anévrysme diff us (ou non-circonscrit, ou par infiltration). Ger., unbegrenztes ‘Aneurysm a. See Consecutive diffuse a.—Diffused false a. See Consecutive diffuse u.—Diffased traumatic a. Lat., oneurysma traumaticum diffusum. A consecutive diffuse a. due to traumatism.— Direct arterio-venous a. See Aneurysmal VARIX. —Di ecting a. Lat., aneurysm a di ecans. Fr., anévrysme di équant. Ger., di ecirendes Aneurysm a. It., aneurism a di ecante. One formed in consequence of rupture of the inner coat of an artery, or of the inner and middle coats, the blood forcing its way into the substance of the middle coat or between the middle and outer coats. [T. Holmes (A, 364).]—Di ecting a. of capillaries, Embolic a. Ger., embolisches Aneurysm a. A dilatation of a minute artery, especially of the brain or the mesentery, due to an accumulation of particles (such as parasites, portions ot neoplasms, etc.). It may take the form of a di ecting a., the intima being torn. [D, 4.|—Encysted a. Fr.…anévrysme enkysté. A circumscribed consecutive a.—Endogenous a. Ger., endogenes Aneurysm a. See Spontaneous a.—Exogenous a. See Traumatic a—External a. Lat., aneurysm a externum. Fr., anévrysme externe. Ger., du eres Aneurysm a. It., aneurism a ester no. Sp., an eur is me externo. 1. One so situated as to be acce ible to surgical treatment, away from the great cavities of the pat ye [Richet (D, 93).] 2. One in which the cavity of the tumor is wholly or mainly ‘external to the inner coat of the artery.—False a. Lat., aneurysm a spurium (sen nothum). Fr., anévrysme faux, Ger., falsches Aneurysm a. It., Sp., aneurism a falso. One in which the ‘walls of the tumor do not consist of all the coats of the artery. T. Holmes thinks it best. to restrict the term to consecutive a’: 364.)—False arterial a. A false a. affecting only an arte’ 7.]—Faise circumscribed a., Faise cir cam scribed co: tive.a. Fr., Cea ae enkysté. A consecutive a. which has become walled in by lymphy exudation. (D, 12, 139.]—False consecutive a. See Consecutive a—Faise consecutive arteriovenous a. Fr., anévrysme artério so-veineux faux consécut if. A consecutive a. communicating with both an artery and a vein. [Reed (D, 93).]—False consecutive cardiac a. See A. of the eart (1st def,).—False diffnse a., False diffuse primitive a., False primitive a. See Traumatic a—False sacculated a, A sacculated a. the sac of which is not composed of all the coats of the artery. [Ashhurst (D).]—False spontaneous a. Fr, anév- | arterial a. See Cirsoid a.— Rodrignes’s a. See Anfynysme rysme faux spontané. A false a. which is not traumatic. [Monod, | variqueux enkysté artériel—Sacciform a., Saccular Saceu- “Gaz. des höp.,” 1810, il, p. 187 | lated a. _ Lat., aneurysm a sacciforme (seu saccatum). Fr., anév- (D).|—False varicose a. Lat., aneurysm a spurium varicosum. Fr., anévrysme faux variqueux. See A. by anastomosis.—Fusiform a. Lat., aneurysm a fus: forme. Fr., anévrysme fusi- Forme. Ger., spindelfirmiges ‘Aneurysm a. ‘It., Sp.,aneurism a fusiforme. One in which the tumor projects about equally on all sides of the artery and ead at either end. [E.]—Hernial a., Hernial false a. Fr., anévrysme hernieux. One in which the sac is formed of the internal coat of the artery, with or without the middle coat, and has pushed its way throngh an opening in the outer coat. [T. Holmes (A, 361).]-Fdiopathie a. One not traceable to any of the usual causes. [H. Walton, ‘* Med. Times and Gaz.,” 1865, ii, p. 164 (D).]— Internal a. Lat., aneurysm a internum. Fr., anévrysme interne. Ger., inneres Aneurysm a. It., Sp., anenrisma inter no. One situated within one of the great splanchnic cavities. [Richet (D, 93).|—Intra-orbital a. See A. of the orbit.—Imtra-thoracic a. See Thoracic a.—Lateral a. Fr., anévrysme latéral. One that projects on one side of the artery, the remainder of its cireumference being unimpaired. [Richet (D, 93).] Cf. Sacculated a.— Lateral a. of the heart. See A. of the heart (1st def.).—Lateral arterio-venous a. Fr., anévrysme artério-veineux late: ral, A term applied by Vidal to a_varicose a. in which the sac was situated at one side of the canal leading from the artery to the vein. [{Richet (D, 93).]—Mlliary a. Lat., aneurysm a miliare. Fy., anévrysme miliaire. Ger., miliares Aneurysm a. A pouch like dilatation of an arteriole, often no larger than a pin’s head (seen in the ve els of the brain and of the pia mater). [A, 385; E,]—Mixed a. Lat., aneurysm a mixtum. Fr., anévrysme mixte. Ger., vermischtes (oder zus am-