Dyspnea and chest tightness and shortness of breath at 28 weeks of pregnancy is not necessarily a manifestation of hypoxia, which can be seen in physiological factors, but also in hypertensive syndrome of pregnancy, pregnancy heart disease and other pathological conditions.
1. Physiological factors: pregnant women can be affected by the increase in circulating blood volume after pregnancy, hormonal changes and other factors, there can be an increase in cardiac output, accelerated respiration, etc., may be conscious of dyspnea, chest tightness, shortness of breath and other manifestations, is not a manifestation of hypoxia.
2. Hypertension during pregnancy: Pregnant women with hypertension during pregnancy may experience chest tightness, shortness of breath or even sedentary breathing if the symptoms are severe, which is a manifestation of hypoxia and a sign of the early stage of heart failure, and should be consulted and treated as soon as possible.
3. Combined heart disease in pregnancy: Pregnant women with heart disease originally, after pregnancy, the burden on the heart increases, which may aggravate the cardiac symptoms, chest tightness, shortness of breath, dyspnea and other manifestations. Symptoms are generally suspected of hypoxia, and should be promptly consulted.
In conclusion, if dyspnea, chest tightness, shortness of breath and other manifestations occur during pregnancy, you should consult a doctor in time to clarify the cause of the disease, and under the guidance of the doctor for treatment.