Irregular fetal heart rate

Introduction Generally, the fetal heart sound is 120-160 beats per minute. If it is too high or too low, consider that the fetus may have intrauterine hypoxia and asphyxia. It is recommended to do further examination to confirm the diagnosis and symptomatic treatment. Therefore, it is recommended to actively carry out B-ultrasound to determine the situation as well. Before the fetal movement is reduced, the fetal heart rate is excessive. If it exceeds 160 beats/min, it is the signal of early hypoxia in the fetus; if the fetal movement is reduced or stopped, and the fetal heart rate is less than 120 beats/min, it is the late stage of fetal hypoxia. The simplest and most effective way to treat hypoxia in the fetus is fetal heart monitoring.

Cause

(1) Maternal factors: pregnant women suffering from heart disease, heart failure, high fever, acute blood loss, severe anemia and the use of anesthetics, etc., can make pregnant women with insufficient blood volume and fetal hypoxia.

(B) uterine factors: uterine contraction is too strong, too frequent, and even tonic contraction, so that the uterine blood circulation is affected, and the fetal hypoxia.

(C) fetal factors: early placental stripping, placenta previa, pregnancy-induced hypertension syndrome, expired pregnancy and chronic nephritis, etc., causing placental circulation disorders, and fetal hypoxia.

(4) umbilical cord: umbilical cord knotting, prolapse, around the neck, around the body, etc., so that the blood flow function of the umbilical blood vessels is blocked and cause fetal hypoxia.

(5) Fetal aspects: fetal cardiovascular system insufficiency, fetal intracranial hemorrhage, fetal malformation and maternal and child blood type incompatibility. Before the fetal movement is reduced, the fetal heart rate is excessive. If it exceeds 160 beats/min, it is the signal of early hypoxia in the fetus; if the fetal movement is reduced or stopped, and the fetal heart rate is less than 120 beats/min, it is the late stage of fetal hypoxia. The simplest and most effective way to treat hypoxia in the fetus is fetal heart monitoring.

an examination

Related inspection

Fetal heart monitoring obstetrics B super fetal heart movement

The normal fetal heart rate changes with the uterus environment, and the change of fetal heart rate is the performance of the normal regulation function of the central nervous system, and it is also a good performance of the baby in the uterus. The mission of fetal heart monitoring is to detect fetal abnormalities as early as possible. When the fetus has not suffered irreversible damage, take effective first aid measures to enable the newborn to be delivered in time to avoid damage that affects lifelong. The fetal movement and fetal heart rate can be monitored to reflect the condition of the fetus in the mother. After 35 weeks of pregnancy, the pregnant woman should be monitored for fetal heart rate.

Differential diagnosis

Need to be identified with the following symptoms:

Abnormal fetal heart rate: fetal heart rate is regulated by sympathetic and parasympathetic nerves. The curve of the monitoring pattern formed by the instantaneous fetal heart rate changes can be used to understand the fetal heart reaction during fetal movement and contractions. No oxygen deficiency. Normal pregnancy is performed once a week from the 37th week of pregnancy. If there are complications or complications, you can start from the 28th to 30th week of pregnancy. Should pay attention to whether the rhythm of fetal heart sounds is slow or slow, etc., normal fetal heart sounds 120 ~ 160 beats / min, if the fetal heart sounds 160 beats / min or more or last 100 beats / min mean fetal intrauterine hypoxia, should Timely treatment.

Fetal heart sound: clock rhythm: also known as fetal heart rhythm, fetal heart-like heart sound. The patient takes the supine position, and the patient is auscultated in the apical area. If the first heart sound loses its inherently low blunt tone, and the second heart sound is similar to the second heart sound, and the heart rate is too fast, it is like a pendulum. "Acoustic, called the pendulum law. If accompanied by tachycardia, when the heart rate is more than 120 beats per minute, it is called fetal heart rhythm.

Changes in fetal heart rate: the fetal heart rate is regulated by the sympathetic and parasympathetic nerves. The curve of the monitoring pattern formed by the instantaneous fetal heart rate changes can be used to understand the fetal heart reaction during fetal movement and contractions. Whether there is no oxygen. Abnormal fetal heart rate in most cases means that the fetus has hypoxia in the uterus. The more severe the abnormal fetal heart rate, the more severe the fetal hypoxia is, but not all fetal heart abnormalities are caused by hypoxia. In addition, the condition of the pregnant woman itself also affects the changes in the fetal heart, such as a fever in pregnant women.

The material in this site is intended to be of general informational use and is not intended to constitute medical advice, probable diagnosis, or recommended treatments.