| valvular pneumothorax | A variety of spontaneous pneumothorax in which air enters the pleural cavity and is trapped during expiration; intrathoracic pressure builds to values higher than atmospheric pressure, compresses the lung, and may displace the mediastinum and its structures toward the opposite side, with consequent disadvantageous effects on blood flow. Synonym: pressure pneumothorax, valvular pneumothorax. (05 Mar 2000) |
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| valvular prolapse | <syndrome> A syndrome, particularly of the atrioventricular valves, in which systole causes a sudden tensing of a scallop of a valve or an entire cusp producing the auscultatory click. Synonym: valvular prolapse. (05 Mar 2000) |
| valvular regurgitation | A leaky state of one or more of the cardiac valves, the valve not closing tightly and blood therefore regurgitating through it. Synonym: valvular incompetence, valvular insufficiency. (05 Mar 2000) |
| valvular sclerosis | Fibrosis, often with calcification of valves, considered to be an aging change and not due to primary valvular disease. (05 Mar 2000) |
| valvular thrombus | A parietal thrombus that projects into the lumen of the vessel. (05 Mar 2000) |
| valvule | 1. A little valve; a valvelet. 2. <zoology> A small valvelike process. Origin: Cf. F. Valvule. Source: Websters Dictionary (01 Mar 1998) |
| valvulitis | Inflammation of a valve, especially a heart valve. Origin: Mod. L. Valvula, valve, + G. -itis, inflammation (05 Mar 2000) |
| valvuloplasty | Surgical reconstruction of a deformed cardiac valve, for the relief of stenosis or incompetence. Synonym: valvuloplasty. Origin: valve + G. Plastos, formed (05 Mar 2000) |
| valvulotome | An instrument for sectioning a valve. (05 Mar 2000) |
| valvulotomy | 1. Cutting through a stenosed cardiac valve to relieve the obstruction. Synonym: valvulotomy. 2. Incision of a valvular structure. Origin: valve + G. Tome, incision (05 Mar 2000) |
| valyl | The radical of valine. (05 Mar 2000) |
| valyl proteinase | <enzyme> A glycoprotein isolated from candida tropicalis; cleaves peptides at carboxyl group of valine residues; pH optimum between 8 and 9 Registry number: EC 3.4.99.- (26 Jun 1999) |
| valylene | <chemistry> A volatile liquid hydrocarbon, C5H6, related to ethylene and acetylene, but possessing the property of unsaturation in the third degree. It is the only known member of a distinct series of compounds. It has a garlic odour. Origin: Valerian + -yl. Source: Websters Dictionary (01 Mar 1998) |