| 释义 |
mitral, a. and n.|ˈmaɪtrəl|
Also 8 mytrale.
[a. F. mitral, ad. mod.L. mitrālis, f. L. mitra: see mitre n. and -al1.]
A. adj.
1. Of, pertaining to, or resembling a mitre.
1610J. Guillim Heraldry iii. i. 190 The Field is Iupiter, a Crowne Mitrall Imperiall Sol, garnished and enriched with sundry precious Gems, Proper. Ibid., margin, A Crowne Imperiall Mitrall. 1624Darcie Birth of Heresies xii. 54 Which Mytrall Ornament is only preserued for eminent and higher Priests. 1658Sir T. Browne Gard. Cyrus ii. in Hydriot. etc. 41 The mitrall Crown, which common picture seems to set too upright and forward upon the head of Aaron.
2. a. Anat. mitral valve: The left auriculo-ventricular valve of the heart, so called from its shape (see quot. 1872); formerly it was considered as two valves. Also called bicuspid valve.
[1693tr. Blancard's Phys. Dict. (ed. 2), Mitrales Valvulæ, see Episcopales.] 1705W. Cowper in Phil. Trans. XXV. 1974 The Mitral and Semilunary Valves of the Left Ventricle of the Heart. 1860O. W. Holmes Prof. Breakf.-t. xi. 227 Heart hits as hard as a fist,—bellows-sound over mitral valves. 1872Mivart Elem. Anat. 408 The left auriculo-ventricular opening is guarded by two flaps, forming what is called the mitral valve, from a fancied resemblance to a bishop's mitre.
b. Anat. and Path. Of or pertaining to the mitral valve.
1853Markham Skoda's Auscult. 207 Constriction of the mitral orifice. 1857Dunglison Med. Lex. s.v. Regurgitation, Mitral regurgitation..means the reflux of blood through the left auriculo-ventricular opening, during the contraction of the left ventricle. 1872Half-Yearly Abstr. Med. Sci. LV. 103 (heading) The physical signs of mitral stenosis. 1879St. George's Hosp. Rep. IX. 406 With mitral and tricuspid insufficiency. 1891Syd. Soc. Lex., Mitral area, the area in which the sounds produced at the mitral valve are best heard. 1926Daily Colonist (Victoria, B.C.) 14 Jan. 4/6 In 1921 the patient, a young girl, came up to the London Hospital suffering from mitral stenosis, or a gradual closing of one of the four valves of the heart. 1966Wright & Symmers Systemic Path. I. xxiv. 50/1 In mitral stenosis, two further complications may arise which still further burden the already overstressed heart:..arterial fibrillation, and..increasing incompetence of the valve with progressively greater regurgitation of blood into the left atrium during ventricular systole.
B. n. = mitral valve.
[1704J. Harris Lex. Techn. I, Mitrales, are two Valves at the Orifice of Vena pulmonaris, in the Left Ventricle of the Heart.] 1835J. Hope in Cycl. Pract. Med. IV. 424/1 Extreme contraction of the mitral..can be detected by the characters of the pulse, and the assemblage of other signs. 1897Allbutt's Syst. Med. III. 450 A..contracted mitral. 1899Ibid. VI. 25 The degree of stenosis of the mitral is generally more severe than that of the tricuspid. |