ostium primum

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os·ti·um pri·mum

n. L. ostium primum, apertura que comunica las dos aurículas del corazón fetal y se empequeñece gradualmente.
English-Spanish Medical Dictionary © Farlex 2012
References in periodicals archive ?
Ostium primum atrioventricular septal defect: an anatomical and surgical review.
Among the common congenital acynotic heart diseases, ASDs are anatomically classified into four types: 1) Ostium secundum (85%), 2) Ostium primum (10%), 3) Sinus venosus (5%), and 4) Coronary sinus defects (rare).
All patients with isolated atrial septal defect (ostium secundum, ostium primum and sinus venosus with or without partial anomalous pulmonary venous connection) were included.