Early heart failure in combined heart disease in pregnancy is manifested as follows: 1, pregnant women feel chest tightness, shortness of breath, panic, uneven breath, etc. after minor activities; 2, at rest, pregnant women’s heart rate ≤ 110 beats per minute or respiratory rate > 20 beats per minute, i.e., the heart rate is faster in the resting state; 3, at night during sleep, pregnant women feel tightness in the chest, unable to breathe, and they need to sit up or go to the window to get some fresh air; 4, during routine obstetrics examination, it can be found that there is a persistent rumbling in the lungs, which cannot be alleviated by coughing on its own.