Cardiac insufficiency in pregnancy is manifested by pulmonary abandonment, acute pulmonary edema, and right heart failure. Heart disease during pregnancy can be divided into two main categories. The first category is pre-existing heart disease, mostly rheumatic and congenital heart disease, while hypertensive heart disease, mitral valve prolapse and hypertrophic heart disease are rare. The second category is pregnancy-induced heart disease, such as hyperemesis gravidarum and perinatal heart disease. So what are the preventive methods for pulmonary abandonment of blood in pregnancy? The following is a brief introduction for you. 1, therapeutic abortion pregnant women with organic heart disease should have abortion as soon as possible if they have the above-mentioned indications that are not suitable for pregnancy. If the pregnancy is more than 3 months old, you should choose a suitable abortion measure. If heart failure occurs during pregnancy, abortion should be performed after heart failure is controlled. 2, strengthen the prenatal examination of the heart function Ⅰ, Ⅱ pregnant women can continue pregnancy, should start from early pregnancy system prenatal examination, close observation of the heart function. It is best to be jointly monitored by obstetrics and internal medicine. Clinically, it is not uncommon to see that patients with cardiac function grade I or II can rapidly deteriorate to grade III or even develop heart failure when they are strained during pregnancy or have upper respiratory tract infections, and must be hospitalized. Patients with this disease are often nervous, should be more comfort, to avoid mood swings. 3, prevention of heart failure every night to ensure 10 hours of sleep, daytime rest after meals 0.5 to 1 hour. Limit the amount of activity and limit the amount of salt to no more than 4 grams per day. Actively prevent anemia, give iron, folic acid, vitamins B and C, calcium, etc. Enhance nutrition. Weight gain should not exceed 11 kg during the whole pregnancy. 4.Early detection of heart failure should be alerted when there is a sudden decline in physical strength, paroxysmal cough, accelerated heart rate, persistent wet sounds at the bottom of the lungs that do not disappear after coughing, increased edema or excessive weight gain. 5, timely treatment of acute heart failure to take a semi-recumbent position to facilitate breathing and reduce the amount of return blood, immediate oxygen, sedation, diuretics (generally tachypnea sedation or oral), sedation cardiac drugs Sidran or poisonous trichothecene K. After the improvement of symptoms can be used as appropriate oral hairy preparation digoxin, 0.25 to 0.5 mg per day, as a maintenance amount. 6. Timely admission to hospital even if asymptomatic, should be admitted 2 weeks before the expected date of delivery. Those whose heart function deteriorates to grade III during pregnancy or those with infection should be promptly hospitalized. 7.The management of those with a history of cardiac surgery still depends on the cardiac function after surgery.