Regular contraction and diastole of the heart is to maintain the blood circulation is guaranteed to promote blood circulation, the heart must store a certain amount of energy beforehand, blood from the atria into the ventricles, with the blood filling and so on continue, the pressure in the left ventricle is getting higher and higher. When the arterial pressure is exceeded, ejection of blood begins. The ejection of blood goes from slow to fast, and at the end of the ejection period the pressure reaches its maximum value, which is also the fastest moment of ejection, and it is necessary to overcome the weight of the blood and the elastic resistance of the blood vessels, so that the blood reaches the furthest end as possible. Rapid ejection period lasts for a short time, about 0.1 seconds, normal people can’t feel this process, but after strenuous exercise, mental stress or drinking a lot of alcohol will feel the heart thumping, every heartbeat is a rapid ejection of blood, although you can feel the heart failure, but it does not affect the health of the body, and it will be healed by itself after resting.