What does abnormal STT mean?

What is the reason for abnormal ST segment in pregnant women's electrocardiogram? We need to do a lot of tests during pregnancy. Are these tests necessary? What is the purpose of this kind of inspection? In fact, all examinations are based on the health of mother and baby, so pregnant mothers must cooperate with doctors to do various examinations. Today, the editor will take everyone to understand, what is the reason for abnormal ST segment in electrocardiogram examination of pregnant women?

What causes abnormal ST segment in pregnant women's electrocardiogram?

ST segment: The flat line from the end of the QRS complex to the beginning of the T wave, reflecting that all parts of the atrium are excited and all parts are in a depolarized state, so there is no potential difference. When normal, it is close to the lightning protection grounding wire, the downward deviation shall not exceed 0.05 mV, the upward deviation in the body lead shall not exceed 0.1 mV, and in the single-stage flow process, it reaches 0.2-0.3 mV in V1, V2, and V3; it rarely exceeds 0.1 mV in V4 and V5 leads. In a normal cardiac output, the ST segment depression should not be less than 0.05 mV. Any increase or decrease beyond the stated range is considered abnormal.

The meanings of ST segment changes in electrocardiogram examination include ST elevation, depression, increase and decrease. Regarding the ST segment, generally only the lowering is discussed, also known as ST depression. ST segment depression can be roughly divided into three types: ST upward depression, ST downward depression and horizontal depression. At present, the ST segment depression level is recognized as 0.5mm. When the ST segment is horizontal and oblique downward and is lowered by 30.5mm, it is usually considered to have most physiological significance. It is more common in coronary heart disease represented by myocardial ischemia, and can also occur in patients with cardiomyopathy, hypertension, the effects of drugs such as digitalis, hypocalcemia, athlete's heart and various organic heart diseases.

When the ST segment changes on the electrocardiogram are horizontal and oblique and depressed by <0.5mm, they are considered to have mostly abnormal physiological significance. When the ST segment is inclined upward and lowered by 30.5mm, it is generally considered to have no accurate physiological significance. When the ST segment is slanted upward and depressed by &lt;0.5mm, it is generally considered to have no physiological significance for the heart itself. The latter two are more common in patients or normal people with cardiac neurosis, autonomic nervous system dysfunction, hyperactivity of thyroid cysts and other emotional excitement, tachycardia, etc. with central nervous system excitement tendencies, especially in normal young people (especially young women) and menopausal women. This type of ST segment change on electrocardiogram is considered a nonspecific change. The characteristics of nonspecific ST changes are an upward sloping decrease, which is more common in leads II, III, and aVF, but sometimes can also appear in other leads.

Frequently asked questions about childbirth

We usually regard the 40th week of pregnancy as the delivery week. In other words, the expectant mother will give birth in about a week. At this time, the expectant mother's uterus height is about 36 to 40 centimeters. At this time, the amniotic fluid environment where the fetus is located has also changed to a certain extent. The original amniotic fluid was clear and transparent. Now, due to the shedding of the fetal body hair and vernix caseosa, as well as the formation of other secretions, the amniotic fluid has become more turbid and milky white. The function of the placenta gradually declines until the baby is delivered. At this time, mothers should not relax their vigilance and pay special attention to the following aspects:

1. Never let pregnant women go hungry before giving birth. The survey shows that pregnant women expend a lot of energy during childbirth. Therefore, pregnant women must eat enough and eat well before giving birth. At this time, relatives should find ways to let pregnant women eat more nutritious and easy-to-digest foods, and never accompany the delivery without eating anything.

2. Never let pregnant women get tired before delivery. Pregnant women should resolutely refuse excessive physical or mental exertion. During pregnancy, pregnant women should reduce their activity appropriately and work intensity as much as possible. In particular, they should pay attention to rest and get enough sleep.

3. Never let pregnant women feel anxious before delivery. The survey shows that pregnant women may experience depression, anxiety, and depression when they encounter great difficulties in their daily life or work, or when unexpected tragic events occur. This depressed mentality may affect the successful delivery of pregnant women. Therefore, there is no need to relieve too much work pressure on pregnant women. Working pregnant women should be given maternity leave as appropriate before giving birth.