A normal heart has two atria, left and right, separated by the atrium and diaphragm. Atrial middiaphragmatic defect refers to a hole in the atrium's middiaphragm, allowing blood from the left and right atria to communicate with each other. The incidence rate is about 1/1500. It is a very common congenital heart disease, accounting for about 5~10% of all congenital heart diseases, twice as much as women and men. There are four types of atrial middiaphragmatic defects, which have different names depending on the location of the hole. Type 1 hole is located in the lower part of the atrium middiaphragm, accounting for about 30%; type 2 is the most common, and the damage is in the middle of the atrium middiaphragm. , accounting for about 50~70%; the other two types (venous sinus type and uncapped coronary sinus type) are very rare clinically. Symptoms of diaphragmatic defect in the atrium: 1. The severity of symptoms is determined by the size and flow of the defect. Newborns have al...
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