| RVA | re-entrant ventricular arrhythmia; right ventricle activation; right vertebral artery |
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| RVEF | right ventricular ejection fraction; right ventricular end-flow |
| RVF | renal vascular failure; Rift Valley fever; right ventricular failure; right visual field |
| RVG | right ventral glutens [muscle]; right visceral ganglion |
| VR | right arm [electrode]; valve replacement; variable ratio; vascular resistance; venous reflux; venous... |
| accessory meningeal branch of middle meningeal artery | <anatomy, artery> A branch of either the middle meningeal or maxillary artery in the infratemporal fossa and passing superiorly through the foramen ovale to supply the trigeminal ganglion, dura mater and inner table of bone. Synonym: ramus meningeus accessorius arteriae meningeae mediae. (05 Mar 2000) |
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| acetabular branch | An arterial branch that supplies the acetabulum; two arteries, the obturator and the medial femoral circumflex, have such branches. Synonym: ramus acetabularis, acetabular artery, arteria acetabuli. (05 Mar 2000) |
| acromial branch of suprascapular artery | <anatomy, artery> Branch of suprascapular artery which pierces the origin of the trapezius muscle to run to the acromion; anastomoses, acromial branch of thoracoacromial artery. Synonym: ramus acromialis arteriae suprascapularis. (05 Mar 2000) |
| acromial branch of thoracoacromial artery | <anatomy, artery> A branch of the thoracoacromial artery that runs over the coracoid process and under the deltoid muscle. Synonym: ramus acromialis arteriae thoracoacromialis, acromial artery. (05 Mar 2000) |
| anastomotic branch | The anastomotic branch, a blood vessel that interconnects two neighboring vessels. It should not be used for the nervous system, because there is no analogy between a vascular anastomosing branch and a connection between nerves or their subdivisions. Synonym: ramus anastomoticus. (05 Mar 2000) |
| anastomotic branch of middle meningeal artery to lacrimal artery | <anatomy, artery> A branch of the middle meningeal artery arising in the cranial cavity which runs anteriorly through the superior orbital fissure to anastomose with the lacrimal artery. See: orbital branch of middle meningeal artery. Synonym: ramus anastomoticus arteriae meningeae mediae cum lacrimali. (05 Mar 2000) |
| anterior basal branch | Anterior basal branch of basal parts of the inferior lobar branches of the right and left pulmonary arteries, and superior basal branches of the right and left inferior pulmonary veins. Synonym: ramus basalis anterior. (05 Mar 2000) |
| anterior branch | The anterior branch of the following: great auricular nerve lateral cerebral sulcus left and right superior pulmonary veins medial cutaneous nerve of the forearm obturator artery obturator nerve renal artery right branch of portal vein right hepatic duct superior thyroid artery ulnar recurrent artery. Synonym: ramus anterior. (05 May 2002) |
| anterior cutaneous branch of iliohypogastric nerve | <anatomy, nerve> Distribution, skin on pubis. Synonym: ramus cutaneus anterior nervi iliohypogastrici, genital branch of iliohypogastric nerve. (05 Mar 2000) |
| anterior scrotal branch of external pudendal artery | <anatomy, artery> Distribution, skin of anterior scrotum; anastomoses, posterior scrotal branches from internal pudendal artery. Synonym: rami scrotales anteriores arteriae pudendae externae. (05 Mar 2000) |
| apical branch | The apical branch of the following: 1) superior lobar branches of left and right pulmonary arteries; 2) left superior pulmonary vein. Synonym: ramus superior. Synonym: ramus apicalis. (05 Mar 2000) |
| apicoposterior branch of left superior pulmonary vein | <anatomy, vein> Drains apicoposterior bronchopulmonary segment of superior lobe of left lung. Synonym: ramus apicoposterior venae pulmonalis sinistrae superioris. (05 Mar 2000) |
| ascending anterior branch | The ascending anterior branch of the superior lobar branches of the left and right pulmonary arteries. Synonym: ramus anterior ascendens. (05 Mar 2000) |
| ascending branch | A branch directed superiorly. Nomina Anatomica recognises the ascending branch of the following: 1) deep circumflex iliac artery; 2) lateral cerebral sulcus; 3) lateral circumflex femoral artery. Synonym: ramus ascendens. (05 Mar 2000) |
| ascending branch of the inferior mesenteric artery | <anatomy, artery> Branch of the left colic artery (from inferior mesenteric artery) that passes anteriorly to the left kidney into the transverse mesocolon, where it anastomoses with the middle colic artery. It thus forms an anastomosis between superior and inferior mesenteric arteries, and is a component of the marginal artery (Drummond) of the colon. Synonym: arteria ascendens, arteria intermesenterica. (05 Mar 2000) |