Neonatal symptoms of patent foramen ovale?

summary

In clinical work, many parents consulted their children. During the cardiac ultrasound examination in the hospital, they found that there were small shunts or pores in the atrial septum of the heart, most of which were less than 5mm in diameter, and they asked to operate on their children. In fact, this kind of condition is called patent foramen ovale in medicine, which is a normal physiological phenomenon in the period of newborn and infant, not congenital heart disease. Most children will close themselves with their growth and development, and do not need surgery. Neonatal symptoms of patent foramen ovale? Let's talk about it.

Neonatal symptoms of patent foramen ovale?

The first is the formation of foramen ovale. At the 6th and 7th week of embryonic development, the atrial septum successively sends out two septa. The first septum is primary septum or the first septum, and the second septum is secondary septum or the second septum. The primary septum grows from the dorsal wall of the atrial midline in a half moon shape, grows to the atrioventricular canal, fuses with the endocardial cushion, and leaves a small hole with the end of the atrioventricular septum, which is called primary foramen. Before the primary foramen is closed, the proximal part of the primary septum forms a foramen, called secondary foramen, which is the normal passage of blood during the fetal period. At the same time, on the right side of the first septum, a sickle shaped septum grows from the atrial wall, which is called the secondary septum or the second septum. This septum does not continue to grow. The separated atrium stops midway. The sickle shaped depression is oval, which is called the oval fossa. At the oval fossa, the primary septum and the secondary septum fail to adhere and fuse, leaving a small gap, which is called the foramen ovale.

Second, when we are born and know how to breathe with our lungs, the pumping pressure of the left atrium will be higher than that of the right atrium, and the foramen ovale, which is located in the upper part of the heart, that is, the small door on the left atrium and the right atrial septum, will be closed. As time goes by, fibrous tissue grows on the foramen ovale, which further seals the door to keep it closed. In this way, the hypoxic blood flowing through the right atrium is completely separated from the oxygen filled left atrium. With the help of the left atrium, the oxygen filled blood can be smoothly pumped to the whole body to provide oxygen. Foreign studies have pointed out that about 25 to 30% of the people have this small door, not completely closed, known as "patent foramen ovale.".

Third, patent foramen ovale has a great influence on some people. The reason is that the hypoxic blood flowing through the right atrium will flow to the left atrium through this small gate and mix with the blood full of oxygen there. In this way, the oxygen content of the blood pumped through the left atrium to the whole body will decrease.

matters needing attention

If the blood from the right atrium has blood clots (thrombus), they will also be pumped directly to the brain by the left atrium, leading to cerebrovascular embolism and stroke. Blood clots may also form in the unclosed foramen ovale and migrate to the left atrium and upper brain, resulting in stroke.