| RVAW | right ventricle anterior wall |
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| RVI | relative value index; right ventricle infarction |
| RVWT | right ventricle wall thickness |
| SCOT | subcostal [right ventricle] outflow [view] |
| RL | radial line; radiation laboratory; reduction level; renal dysplasia-limb defects [syndrome]; resisti... |
| lateral aperture of the fourth ventricle | One of the two lateral openings of the fourth ventricle into the subarachnoid space at the cerebellopontine angle. Synonym: apertura lateralis ventriculi quarti, foramen lateralis ventriculi quarti, foramen of Key-Retzius, foramen of Luschka, Retzius' foramen. (05 Mar 2000) |
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| fourth ventricle | A cavity of irregular tentlike shape extending from the obex rostralward to its communication with the sylvian aqueduct, enclosed between the cerebellum dorsally and the rhombencephalic tegmentum ventrally, having a rhomboid-shaped floor (rhomboid fossa) and a tentlike roof which in its caudal part is formed by the tela choroidea and the posterior medullary velum, in its middle part by the white matter of the cerebellum, and in its narrowing rostral part (recessus superior) by the anterior medullary velum. The fourth ventricle reaches its greatest width at the pontomedullary transition, where it expands laterally behind the cerebellar peduncles into the spoutlike lateral recess, and its greatest height at the fastigial recess, which reaches up into the cerebellar white matter. Direct communication of the brain's ventricle system and the subarachnoid space is established at the level of the fourth ventricle by a median opening in the tela choroidea, the medial aperture of Magendie's foramen, which opens into the cerebellomedullary cistern, and on both sides by the lateral aperture or foramen of Luschka, which connects the lateral recess with the interpeduncular cistern. Synonym: ventriculus quartus, ventricle of rhombencephalon. (05 Mar 2000) |
| fourth ventricle mass | <radiology> IN ADULTS: choroid plexus papilloma, haemangioblastoma, vermian metastasis, arteriovenous malformation (AVM), inflammatory mass/cyst IN KIDS: medulloblastoma, uniform enhancement, homogeneous, ependymoma, patchy enhancement, heterogeneous, calcified (12 Dec 1998) |
| lateral recess of fourth ventricle | The narrow recess of the ventricle that extends laterally over, and down along the side of, the inferior cerebellar peduncle and the overlying cochlear nuclei; at its tip it opens by way of Luschka's foramen into the interopeduncular cistern of the subarachnoid space. By way of this recess, part of the choroid plexus of the fourth ventricle protrudes into the subarachnoid space. Synonym: recessus lateralis ventriculi quarti. (05 Mar 2000) |
| lateral vein of lateral ventricle | A vein draining deep portions of the temporal and parietal lobes; it runs in the lateral wall of the lateral ventricle to terminate in the superior thalamostriate vein. Synonym: vena ventriculi lateralis lateralis, lateral atrial vein, lateral vein of lateral ventricle. (05 Mar 2000) |
| lateral ventricle | A cavity shaped somewhat like a horseshoe in conformity with the general shape of the hemisphere; each lateral ventricle communicates with the third ventricle through the interventricular foramen of Monro, and expands from there forward into the frontal lobe as the anterior horn as well as caudally over the thalamus as the central part or cella media which, behind the thalamus, curves ventrally and laterally, then forward into the temporal lobe as the inferior horn; from the apex of the curve a variably sized posterior horn extends back into the white matter of the occipital lobe. The large choroid plexus of the lateral ventricle invades the cella media and the inferior horn (but not the anterior and posterior horn) from the medial side. Synonym: ventriculus lateralis, ventricle of cerebral hemisphere. (05 Mar 2000) |
| left ventricle | <anatomy> The muscular chamber of the heart which accepts blood from the left atrium and ejects it into the aorta to the systemic circulation. (27 Sep 1997) |
| apical branch of inferior lobar branch of right pulmonary artery | <anatomy, artery> Branch (of the inferior lobar branch) of the right pulmonary artery serving the apical segment of the inferior lobe of the right lung. Synonym: ramus apicalis lobi inferioris arteriae pulmonalis dextrae. (05 Mar 2000) |
| arrhythmogenic right ventricular dysplasia | A congenital cardiomyopathy in which transmural infiltration of adipose tissue results in weakness and aneurysmal bulging of the infundibulum, apex, and posterior basilar region of the right ventricle and leads to ventricular tachycardia arising in the right ventricle. (12 Dec 1998) |
| atrial function, right | The haemodynamic and electrophysiological action of the right atrium. (12 Dec 1998) |
| auricle of right atrium | The small conical projection from the right atrium of the heart. Synonym: auricula dextra, right auricular appendage. (05 Mar 2000) |
| ventricular dysfunction, right | A condition in which the right ventricle of the heart exhibits a decreased functionality. This decreased function could lead to congestive heart failure or myocardial infarction, among other cardiovascular diseases. Diagnostic measurements that indicate this condition include a diminished ejection fraction and a depressed level of motility of the right ventricular wall. (12 Dec 1998) |
| ventricular function, right | The haemodynamic and electrophysiological action of the right ventricle. (12 Dec 1998) |
| right | 1. That which is right or correct. Specifically: The straight course; adherence to duty; obedience to lawful authority, divine or human; freedom from guilt, the opposite of moral wrong. A true statement; freedom from error of falsehood; adherence to truth or fact. "Seldom your opinions err; Your eyes are always in the right." (Prior) A just judgment or action; that which is true or proper; justice; uprightness; integrity. "Long love to her has borne the faithful knight, And well deserved, had fortune done him right." (Dryden) 2. That to which one has a just claim. Specifically: That which one has a natural claim to exact. "There are no rights whatever, without corresponding duties." (Coleridge) That which one has a legal or social claim to do or to exact; legal power; authority; as, a sheriff has a right to arrest a criminal. That which justly belongs to one; that which one has a claim to possess or own; the interest or share which anyone has in a piece of property; title; claim; interest; ownership. "Born free, he sought his right." (Dryden) "Hast thou not right to all created things?" (Milton) "Men have no right to what is not reasonable." (Burke) Privilege or immunity granted by authority. 3. The right side; the side opposite to the left. "Led her to the Souldan's right." (Spenser) 4. In some legislative bodies of Europe (as in France), those members collectively who are conservatives or monarchists. See Center. 5. The outward or most finished surface, as of a piece of cloth, a carpet, etc. at all right, at all points; in all respects. Bill of rights, a list of rights; a paper containing a declaration of rights, or the declaration itself. See Bill. By right, By rights, or By good rights, rightly; properly; correctly. "He should himself use it by right." (Chaucer) "I should have been a woman by right." (Shak) Divine right, or Divine right of kings, a name given to the patriarchal theory of government, especially to the doctrine that no misconduct and no dispossession can forfeit the right of a monarch or his heirs to the throne, and to the obedience of the people. To rights. In a direct line; straight. At once; directly. To set to rights, To put to rights, to put in good order; to adjust; to regulate, as what is out of order. Writ of right, a writ which lay to recover lands in fee simple, unjustly withheld from the true owner. Origin: AS. Right. See Right. 1. Straight; direct; not crooked; as, a right line. "Right as any line." 2. Upright; erect from a base; having an upright axis; not oblique; as, right ascension; a right pyramid or cone. 3. Conformed to the constitution of man and the will of God, or to justice and equity; not deviating from the true and just; according with truth and duty; just; true. "That which is conformable to the Supreme Rule is absolutely right, and is called right simply without relation to a special end." (Whately) 2. Fit; suitable; proper; correct; becoming; as, the right man in the right place; the right way from London to Oxford. 5. Characterised by reality or genuineness; real; actual; not spurious. "His right wife." "In this battle, . . . The Britons never more plainly manifested themselves to be right barbarians." (Milton) 6. According with truth; passing a true judgment; conforming to fact or intent; not mistaken or wrong; not erroneous; correct; as, this is the right faith. "You are right, Justice, and you weigh this well." (Shak) "If there be no prospect beyond the grave, the inference is . . . Right, "Let us eat and drink, for to-morrow we die."" (Locke) 7. most favorable or convenient; fortunate. "The lady has been disappointed on the right side." (Spectator) 8. Of or pertaining to that side of the body in man on which the muscular action is usually stronger than on the other side; opposed to left when used in reference to a part of the body; as, the right side, hand, arm. Also applied to the corresponding side of the lower animals. "Became the sovereign's favorite, his right hand." (Longfellow) In designating the banks of a river, right and left are used always with reference to the position of one who is facing in the direction of the current's flow. 9. Well placed, disposed, or adjusted; orderly; well regulated; correctly done. 10. Designed to be placed or worn outward; as, the right side of a piece of cloth. at right angles, so as to form a right angle or right angles, as when one line crosses another perpendicularly. Right and left, in both or all directions. <medicine> Right and left coupling, a sphere in such a position that the equator cuts the horizon at right angles; in spherical projections, that position of the sphere in which the primitive plane coincides with the plane of the equator. Right is used elliptically for it is right, what you say is right, true. ""Right," cries his lordship." (Pope) Synonym: Straight, direct, perpendicular, upright, lawful, rightful, true, correct, just, equitable, proper, suitable, becoming. Origin: OE. Right, riht, AS. Riht; akin to D. Regt, OS. & OHG. Reht, G. Recht, Dan. Ret, Sw. Ratt, Icel. Rettr, Goth. Raihts, L. Rectus, p. P. Of regere to guide, rule; cf. Skr. Ju straight, right. Cf. Adroit,Alert, Correct, Dress, Regular, Rector, Recto, Rectum, Regent, Region, Realm, Rich, Riyal, Rule. Source: Websters Dictionary (01 Mar 1998) |
| right angle clamp | A clamp with a short 90 |