ostium

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Related to ostium: Ostium primum, Ostium secundum

ostium

[′äs·tē·əm]

(biology)

A mouth, entrance, or aperture.

References in periodicals archive ?

This report presents the case of an ostio-choanal polyp originating in the maxillary sinus ostium mucosa.

Maxillo Ostio Choanal Polyp

To validate mapping, a circular decapolar catheter (Lasso, Biosense Webster) placed around the PV ostium was used.

Concealed Pulmonary Vein Bigeminy during Sinus Rhythm in Patients with Paroxysmal Atrial Fibrillation: A Useful Marker for Pulmonary Vein Firing

Defects in the fontanel area of the lateral nasal wall observed in both axial and coronal PNsCT images were interpreted as an accessory ostium. An accessory ostium is rounder than the natural ostium and the size ranges from 1.2x1.0 to 8.2x6.9 mm (11).

Paranasal Sinus Anatomic Variations Accompanying Maxillary Sinus Retention Cysts: A Radiological Analysis

An unusual lateral ostium of a concha bullosa of the middle turbinate.

Endoscopic view of a drainage pathway of a concha bullosa

The length and distance of origin from the ostium of parent artery were measured with the help of a measuring scale.

A study on anatomy and variations of sinoatrial nodal artery

In this study, single ostium was the most frequent findings (78%), double ostia were seen in 20 hearts (20%), three ostia were seen in two cases (2%) at anterior aortic sinus (Figure 1).

A cadaveric study on the anatomical variations of origin of the coronary arteries in Gujarat state

The objective of our study was to analyze the arterial origin, branching pattern, location ostium, vertebral level of origin, mediastinal trajectory, and diameter of the bronchial arteries using CTA.

Morphological Analysis of Bronchial Arteries and Variants with Computed Tomography Angiography

We report an unusual manifestation of sinus of Valsalva aneurysm involving the ostium of the right coronary artery producing an appearance typical of a giant coronary aneurysm.

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

For type A coronary malperfusion, the coronary ostium was repaired with a continuous 6-0 over-and-over suture conjoining the dissected arterial layers, leaving the ostium in continuity with the aortic wall or directly anastomosing the ostial button to the tube graft.

Surgical Treatment of Coronary Malperfusion with Acute Type A Aortic Dissection

(1,2) The 2 mm P waves in lead [V.sub.2] indicate right atrial enlargement, (3) helping to confirm right ventricular enlargement and to suggest a fossa-ovalis type (ostium secundum) atrial septal defect.

ECG in a 44-year-old man with chest pain

Nasal mucosa and medial wall of the sac was removed up to the extent that the cut margins of the sac were approximated with the margins of the nasal mucosa around the margins of bony ostium. Bone and medial wall of the sac was removed inferiorly up to the upper part of nasolacrimal duct to prevent sump syndrome.

Outcome and complications of endoscopic dacryocystorhinostomy without stenting

All patients with isolated atrial septal defect (ostium secundum, ostium primum and sinus venosus with or without partial anomalous pulmonary venous connection) were included.