ostium

(redirected from coronary ostium)
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ostium

[′äs·tē·əm]
(biology)
A mouth, entrance, or aperture.
References in periodicals archive ?
At that time any significant leaking at the level of the left coronary ostium anastomosis was identified.
Myocardial ischaemia in a case of a solitary coronary ostium in the right aortic sinus with retroaortic course of the left coronary artery: Documentation of the underlying pathophysiological mechanisms of ischaemia by intracoronary Doppler and pressure measurements.
In this condition there is complete atresia of the left coronary ostium, so the entire coronary arterial supply to the heart is derived from the RCA and its branches.
This was caused by either a right subclavian artery that was either tortuous or had an aberrant origin or major aortic arch dilatation making it difficult to manipulate the catheter into the coronary ostium.
63% Anomalous CX origin from Right coronary ostium 1 2.
According to the Neri's definition of coronary malperfusion in aortic dissection,[sup][2] we differentiated among three types of lesions based upon operative findings: type A ( n = 23), ostial dissection is defined as a disruption of the inner layer limited to the area of the coronary ostium without disrupting coronary vessel; type B ( n = 8), dissection with a coronary false channel; and type C ( n = 5), circumferential detachment with an inner cylinder intussusception.
Presentation of anomalous origin of the left coronary artery from the pulmonary artery with left sided coronary ostium in an adult patient.
The calcified left coronary cusp partially obstructed the left main coronary ostium during the aortic balloon valvuloplasty without hemodynamic compromise (Fig.
We also found that right coronary ostium was present at the sinutubular ridge in only 6.

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