Atrial Septal Defect and Patent Foramen Ovale | 合法醫療器材資訊網

Patentforamenovale-wheretheholeissmallandstillpartlycoveredbythetissueflap,itisknownasapatentforamenovaleorPFO.SinusvenosusASD ...

What is it? An atrial septal defect (or ASD) is a hole in the wall (septum) that divides the left and right collecting chambers of the heart (atria). This hole or defect in the septum allows the two collecting chambers (right and left atrium) to be in contact with each other. The lesion is usually isolated but can occur in conjunction with other more complicated types of heart disease.

There are four different types depending on exactly where the defect is in the atrial septum. The most common form is the secundum ASD. Here, the hole is in the centre of the atrial septum, a region that is open in the womb, allowing blood to pass across freely. It should close off at birth with a tissue flap; failure to do so leaves a hole.

Patent foramen ovale - where the hole is small and still partly covered by the tissue flap, it is known as a patent foramen ovale or PFO.

Sinus venos...