Many pregnant women will have panic attacks and rapid heartbeat during pregnancy, after this phenomenon, we should treat the situation separately, as follows: 1. Heartbeat fast, the patient can not lie down at night, be alert to heart disease, such as heart failure, at this time need to promptly go to the hospital to avoid adverse consequences. Normally after pregnancy in women there is an increase in circulating blood volume, the burden on the heart increases, and the rhythm of the heart is faster than in normal non-pregnancy, because the blood volume of the heart increases to the end of pregnancy, which is about 10% of the entire blood volume. In the second trimester, an increase in the number of heart beats by 10-15 beats per minute is normal.