The second form is the sinus venosus type, a relatively uncommon condition featuring a high ASD. It results from abnormal absorption of the sinus venosus into the right atrium or from abnormal development of the septum secundum. Third, a persistent ostium primum results from incomplete fusion of ...
The severity of adverse cardiovascular or cerebrovascular events can be increased by the presence of specific type of ASD, such as a patent foramen ovale (PFO) or osteum secundum defect. This case report discusses a unique presentation of a 48-year old male on warfarin therapy for a history ...