ostium

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ostium

[os´te-um] (L.)

an opening or orifice. adj., adj os´tial.

ostium abdomina´le the fimbriated end of the fallopian tube.

ostium cardi´acum the orifice between the esophagus and the stomach.

coronary ostium either of the two openings in the aortic sinuses that mark the origins of the left and right coronary arteries.

ostium inter´num ostium uterinum tubae.

ostium pharyn´geum the nasopharyngeal end of the eustachian tube.

ostium pri´mum an opening in the lower portion of the membrane dividing the embryonic heart into right and left sides. See also atrial septal defect and congenital heart defect.

ostium secun´dum an opening in the upper portion of the membrane dividing the embryonic heart into right and left sides, appearing later than the ostium primum. See also atrial septal defect and congenital heart defect.)

tympanic ostium (ostium tympa´nicum) the opening of the eustachian tube on the carotid wall of the tympanic cavity.

ostium u´teri the external opening of the cervix of the uterus into the vagina.

ostium uteri´num tu´bae the uterine end of the fallopian tube; the point where the cavity of the tube becomes continuous with that of the uterus.

ostium vagi´nae the external orifice of the vagina.

os·ti·um

, pl.

os·ti·a

(os'tē-ŭm, -ă), [TA]

A small opening, especially one of entrance into a hollow organ or canal.
See also: orifice, opening, os, mouth (2).

[L. door, entrance, mouth]

Farlex Partner Medical Dictionary © Farlex 2012

ostium

(ŏs′tē-əm)

n. pl. os·tia (-tē-ə)

A small opening or orifice, as in a body organ or passage.

ostium

Plural, ostia Medtalk An opening, aperture

os·ti·um

, pl. ostia (os'tē-ŭm, -ă) [TA]

A small opening, especially one that enters into a hollow organ or canal.

[L. door, entrance, mouth]

Medical Dictionary for the Health Professions and Nursing © Farlex 2012

ostium

An opening or mouth.

Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

ostium

any of numerous openings present in sponges through which water is drawn in.

Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

os·ti·um

, pl. ostia (os'tē-ŭm, -ă) [TA]

Small opening, especially one of entrance into a hollow organ or canal.
See also: orifice, mouth (2)

[L. door, entrance, mouth]

Medical Dictionary for the Dental Professions © Farlex 2012

References in periodicals archive ?

Hemodynamically significant CAAs are an anomalous location of coronary ostium at improper sinus with an interarterial course, an anomalous origin of a coronary artery from the pulmonary artery, a single coronary artery with an interarterial coursing major coronary artery, coronary ostial atresia and a congenital coronary artery fistula (20-22).

Evaluation of anatomy, variation and anomalies of the coronary arteries with coronary computed tomography angiography koroner arterlerin anatomi, varyasyon ve anomalilerinin koroner bilgisayarli tomografi anjiyografi ile degerlendirilmesi

(5) documented that right coronary ostium tended to deviate more often towards Commissure I.

Study of coronary ostia, their variations & clinical significance

With the help of this method, we confirmed the SCA originating from solitary coronary ostium without an additional cardiac anomaly.

Conventional and computed tomography angiography views of a rare type of single coronary artery anomaly: right coronary artery arising from distal left circumflex artery/Tek koroner arter anomalisinin nadir bir tipinin konvansiyonel ve cok kesitli bilgisayarli tomografi anjiyografi goruntuleri: distal circumfleks arterden cikan sag koroner arter

Inspection confirmed a right coronary sinus of Valsalva aneurysm involving the right coronary ostium. A bovine pericardial patch was placed between the aortic annulus and sinotubular junction excluding the aneurysm.

Severe Dilatation of Coronary Artery Ostium Complicating Sinus of Valsalva Aneurysm: Differential Diagnosis and Review of the Literature

Pre-procedure blood samples for serotonin measurement were collected from the coronary ostium by using catheter without side holes.

Relationship between no-reflow phenomenon and serotonin levels in patients with acute ST-elevation myocardial infarction who underwent primary percutaneous intervention/ Akut ST yukselmeli miyokart enfarktusu nedeniyle primer perkutan girisim uygulanan hastalarda no-reflow fenomeni ile serotonin duzeyi arasindaki iliski

Levels of serotonin were evaluated in blood samples collected from the coronary ostium by using catheter without side holes.

Serotonin: another player in the complex pathogenesis of no-reflow phenomenon/ "No-reflow" fenomeninin karmasik patogenezinde baska bir oyuncu: serotonin

As discussed in the study, this event is more prominent in the presence of a single coronary ostium giving two main coronary arteries (5).

Importance of anatomic variability of the coronary arterial orifices/Koroner arter orifislerin anatomik degiskenliginin onemi

Guiding catheter was inserted to the right coronary ostium and the direct stent was advanced to proximal to the RCA; however, attempt to advance it distally was unsuccessful.

Successful reimplantation of prematurely displaced stent to the target lesion without balloon inflation during percutaneous intervention to the right coronary artery/Sag koroner artere perkutan girisim sirasinda serbest kalan stentin hedef lezyona balon sisirilmeden basarili bir sekilde yerlestirilmesi

The coronary circulation originating from a single coronary ostium is a rare variation.

Single coronary artery diagnosed by multidedector computed tomography/Cok kesitli bilgisayarli tomografi ile tani konulan tek koroner arter

Aortography showed one coronary ostium in the left sinus of Valsalva and no ostium in the right sinus of Valsalva.

A case of a single coronary artery originating from left coronary sinus of Valsalva associated with serious coronary artery disease/Ciddi koroner arter hastaligi olan sol koroner sinus Valsalva'dan cikan tek koroner arter olgusu

No origin of the coronary ostium arising from the left sinus Valsalva was imaged.

Rare coronary artery anomaly: a single coronary artery arising from the right sinus of Valsalva/Nadir gorulen koroner arter anomalisi: Sag sinus Valsalva'dan cikan tek koroner arter

Ishikawa et al (23) demonstrated that atherosclerosis ratio in the proximal segments of LAD (up to 2.5 cm away from the ostium) was significantly lower in cases with MB located within 5 cm from the left coronary ostium than in the corresponding segments of control group in an autopsy study.

Myocardial bridge: a bridge to atherosclerosis/Miyokardiyal kopruleme: Ateroskleroza kopru