Definition of hss. Norm and deviations from it

Pregnancy certainly can be called one of thethe most important periods in a woman's life, to which she approaches very responsibly. Soon she will become the mother of the dearest little man, so she tries to take care of his health when he is still in the womb. Pregnancy is carefully observed and controlled by doctors in order to prevent all sorts of complications. One of the most effective ways of observing the development of the fetus is the measurement of the heart rate - chss. The average of these reductions on average should be between 120 and 160 beats per minute. However, throughout the duration of pregnancy, these indicators may vary. So, for example, at the gestation period of six to eight weeks, the fetal heart contractions are about 110 to 130 beats per minute, at 9 to 10 weeks at a rate of 170 to 190 strokes, it can be said that the heart rate is normal. Beginning at week 11 and throughout the rest of the gestation period, the heartbeat of the fetus is completely normalized and the norm is 140-160 beats per minute.

It is interesting to know that the study and evaluation of cardiacrhythm have long been used for the early detection of the fetus in utero. Scientist Kilian already in 1848 suggested that the heart rhythm of the fetus can change due to intrauterine hypoxia. Thanks to this assumption, the obstetrical stethoscope was invented and developed. It has become widely used by the time when scientists have shown that it is possible to track the heartbeat more accurately with the help of an electrocardiogram. Later, to these methods of research to get a more accurate and complete picture, they added ultrasound and CTG.

To date, thanks to the constantdevelopment and improvement of science and technology, there is no difficulty in measuring the fetal heart rate. The norm, defined in 120-160 strokes, indicates the normal state and development of the fetus, but the deviations from it to the smaller or larger side already make one think about the causes. That is why, in order to avoid any problems in the development of the embryo, women throughout the pregnancy undergo scheduled ultrasound and cardiotocography.

Cardiotocography is a collection ofuterine contractions and palpitation of the fetus. The results of such a study can give a lot of information about the life of the fetus. More specifically, the ECG makes it possible to evaluate:

- the value of the average heart rate;

- the response of the fetal heart to its movement;

- change in heart rate as a result of uterine contractions;

- the presence of a decrease or increase in heart rate.

When the doctor examines the fetal heart rate, the norm for itis of great importance. It is due to the fact that excess of the norm of cuts can speak about poor and insufficient intake of oxygen to the fetus. Such a condition in medicine is called tachycardia. But the heart rate below the norm may indicate a deterioration in the overall condition of the fetus. Palpitation less than 120 beats / min. may be the cause of placental insufficiency or hypoxia of the fetus. This status is called bradycardia. The only condition in which low heart rate is the norm is the pelvic presentation of the fetus. If the embryo, which is already at least 8 mm in length, has no heartbeat at all and is absent, then it most likely indicates an undeveloped pregnancy. However, in order not to make a mistake and make an accurate diagnosis, the doctor should prescribe a repeated ultrasound to a pregnant woman. It is carried out one week later, and only on the basis of the re-obtained results can we draw specific conclusions.

It is necessary to pay attention of all women to onea small but significant fact: the development of the fetus and its chances depends on the lifestyle that a pregnant woman adheres to. The norm of fetal heart contractions should be supported by the correct mode of rest and labor of the future mother.