When a pregnant woman has difficulty breathing in late pregnancy, she needs to undergo a cardiac ultrasound examination to rule out the possibility of perinatal cardiomyopathy. Perinatal cardiomyopathy is easily induced in women during late pregnancy due to the increased cardiac load caused by the increasing number of gestational months, so it is necessary for women to undergo a cardiac ultrasound when they experience chest tightness as well as dyspnea. Perinatal cardiomyopathy may occur for the first time in the perinatal period, and may cause hepatomegaly, swelling, bloody sputum, and dyspnea at the end of pregnancy or postpartum in pregnant women without a heart, causing ventricular enlargement and appendage thrombosis, etc., so it is necessary to actively undergo examination and treatment. Perinatal cardiomyopathy is dangerous in clinical practice, and pregnant women who have been diagnosed with it need to be actively treated under the guidance of a specialist.