QYR Market Research Global PFO Closure Device market research | Page 4

QYR • There are two kinds of holes in the heart. One is called an atrial septal defect (ASD), and the other is a patent foramen ovale (PFO). Although both are holes in the wall of tissue (septum) between the left and right upper chambers of the heart (atria), their causes are quite different. An ASD is a failure of the septal tissue to form between the atria, and as such it is considered a congenital heart defect, something that you are born with. Generally, an ASD hole is larger than that of a PFO. The larger the hole, the more likely there are to be symptoms. • In the last several years, global market of PFO Closure Device developed rapidly, with an average growth rate of 12%. In 2017, global revenue of PFO Closure Device is nearly 93 M USD; the actual sales are about 19.9 K Unit.