PFOASD Closure - Interventional Cardiology | 合法醫療器材資訊網

APFOoccurswhentheopeningdoesnotclose.Thisopeningcanallowbloodtopassfromtherightatriatotheleftatria.ManytimesaPFOisnotdiscovereduntil​ ...

Patent Foramen Ovale (PFO)The heart is divided into four chambers. The upper chambers are called the right and left atria. The lower chambers are the right and left ventricles. In fetal circulation the foramen ovale is an opening that allows blood to bypass the lungs and go directly from the right atria to the left atria. Shortly after birth the higher pressure in the left atria and the lower pressure in the right atria causes permanent closure of the foramen ovale in the majority of people. A PFO occurs when the opening does not close. This opening can allow blood to pass from the right atria to the left atria. Many times a PFO is not discovered until adulthood. PFO’s are suspected to be a cause of cryptogenic stroke (a stroke that cannot be linked to a specific cause). Research suggests there may be a link between PFO’s and migraine headaches.

Atrial septal defect (ASD)An ASD is a hole in the part of the septum that separates the atria—the upper c...