During pregnancy, especially in the middle or late pregnancy, often accompanied by sinus tachycardia, most of this situation is physiological, as follows: 1, after pregnancy, weight gain, the patient’s heart rate will accelerate, or after pregnancy, with the gradual abdominal augmentation, the diaphragm will be elevated, so that the pressure in the chest cavity increases, this situation will also cause the heart rate to accelerate; 2, if the heart rate accelerates after pregnancy, accompanied by serious 4, usually during pregnancy check-ups must pay attention to ECG and blood pressure monitoring, most patients with hyperemesis gravidarum after pregnancy, the increase in blood pressure will also be accompanied by an accelerated heart rate. Some patients, especially those after the third month of pregnancy, must go to the hospital to see if there is perinatal cardiomyopathy if they have chest tightness, panic attacks, sweating, or swelling of the lower limbs, because perinatal cardiomyopathy can have a greater impact on the pregnant woman as well as the fetus.