Because even if there is a small gap, the next time the pericardium contracts again, there will still be a situation where blood is pressed out of the gap in the heart and squeezed into the chest cavity.There is no one in the world who has suffered a heart injury that can delay for such a long time without dying, and there is no one who can suture and repair the heart after being injured.Nangong Nuannuan didn't have any experience to learn from, he could only rely on his enough understanding of the structure of the human body to try such an operation for the first time - heart suture repair.If the operation is successful, she will break the myth that she will die if she has a heart injury.Nangong Nuannuan's stitching is very meticulous, although she can do it in less time, but she is facing Brother Chiyang, so even if she knows that no matter whether it is fast or slow, the effect will not be much worse, but Nangong Nuannuan is still more careful than usual suturing.The wound in the heart was a bit big, but because when the steel bar was pierced, it rubbed the pericardium, and the pericardium was damaged, but fortunately it did not hurt the atria and ventricles.So she just needs to stitch up the broken pericardium.Two hours is a very long time for Nangong Nuannuan.Because with her hand speed, she should be able to do this kind of stitching in about half an hour.But because this is Brother Chiyang, Nangong Nuannuan was very serious during the operation, and it took a full two hours.After two hours, the pericardium was repaired and sutured together.In total, three places were repaired, the largest wound reached a length of 3 cm, and the smallest wound had 05 cm.But the heart, which is always squeezed by pacing, let alone 05 cm, even 001 cm of damage will be fatal.After the operation, Nangong Nuannuan put away the more than 10 silver needles that were pierced in the heart.After the silver needle was put away, the heart muscle, which had been enlarged to the point of inability to contract, began to contract for the first time.Each contraction of the heart compresses about 70 milliliters of blood, and the blood that is pressed out flows in a certain direction, and the cycle repeats.In medicine, this is known as blood circulation.The main function of blood circulation is to use blood as a means of transport, through the absorption of nutrients absorbed from food and fresh oxygen absorbed from the lungs, venous blood into arterial blood, transported to various organs, tissues and cells of the human body, for them to complete important physiological functions.After being utilized by tissues or cells, the waste products produced and the exhaled carbon dioxide enter the blood, become venous blood, and then carry it through the blood to the lungs, liver, kidneys, skin and other organs and tissues to be excreted from the body, so as to ensure the continuous metabolism of all parts of the body.And the heart is the center that completes this huge circulatory system.Because the heart muscle was enlarged for 2 hours, the blood compressed for the first time only reached about 30 ml after the silver needle was removed, and then it began to rise rapidly.After about a minute, each contraction reaches about 70 milliliters of blood.When he saw that the blood no longer oozes through the pericardium, but circulates to the veins and the brain according to the guidance of the heart, giving the brain a fresh blood supply, Nangong Nuannuan finally exhaled.The most serious injuries have finally been dealt with.However, the ventilator cannot be dismantled yet.