整个心跳过程可分为三部分：收缩前期（GH）：在此期间的心跳过程由返回心

The whole heartbeat process can be divided into three parts: <br><br>Presystole (GH): The heartbeat process during this period consists of a sudden deceleration of blood flow back to the heart, atrial filling and contraction-related forces. The H wave depicts the deceleration of the head; <br><br>systolic period (IJK): When the blood accelerates upward into the ascending aorta, the I wave corresponds to the body’s recoil force toward the foot, which is the first at the beginning of the ejection (early contraction) A minimum wave. After the ventricles are depolarized, when the blood accelerates in the abdomen and the ascending aorta decelerates, the J wave corresponds to the recoil of the body. Peak J depicts the end of the rapid ejection of the two ventricles. K wave and L wave are the reflection of blood flow deceleration, stop and aortic valve closure; <br><br>Diastole (LMN): Diastolic waves (KL and MN) are caused by the peripheral circulation of blood.

The whole heartbeat process can be divided into three parts:<br><br>Pre-shrink (GH): The heartbeat process during this period consists of forces associated with a sudden deceleration of blood flow back to the heart, adrication and contraction. The H-wave depicts the head slowing down;<br><br>Contraction period (IJK): When the blood accelerates upward into the ascending aorta, the I-wave corresponds to the body's backsliding force toward the foot, which is the first minimum wave at the beginning of the blood shot (early contraction). After the chamber is decpolated, the J-wave corresponds to the body's backshot when the blood accelerates in the abdomen and the aorta slows down. J Peak depicts the end of two chambers of rapid injection. K-wave and L-wave are the reflection of blood flow deceleration, stoppation and aortic valve closure.<br><br>Lyso (LMN): Shu (KL and MN) is caused by the outer circulation of blood.

The whole heart beating process can be divided into three parts<br>Pre systolic (GH): the heart beating process during this period is composed of sudden deceleration of blood flow returning to the heart, atrial filling and contraction related forces. The H-wave depicts head deceleration;<br>Systolic period (ijk): when the blood accelerates upward into the ascending aorta, the I wave corresponds to the body's recoil to the foot, which is the first wavelet at the beginning of ejection (early contraction). After ventricular depolarization, the J wave corresponds to the recoil of the body when the blood accelerates in the abdomen and the ascending aorta decelerates. The j peak depicts the end of the rapid ejection of the two ventricles. K wave and L wave are the reflection of blood flow deceleration, stop and aortic valve closure;<br>Diastolic phase (LMN): diastolic waves (KL and Mn) are caused by the peripheral circulation of the blood.<br>