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The atrioventricular block can be first degree or much more severe like a complete atrioventricular block (third degree). [5] [6] In addition, several changes in the ECG can be detected. [5] Other manifestations of the congenital heart block can be related to the impact of the maternal autoantibodies in the autoimmune-mediated CHB.
A Doppler fetal monitor, informally known as sonicaid (generic trademark), is a hand-held ultrasound transducer used to detect the fetal heartbeat for prenatal care. It uses the Doppler effect to provide an audible simulation of the heart beat. Some models also display the heart rate in beats per minute (BPM).
Electrocardiography is the process of producing an electrocardiogram (ECG or EKG [a]), a recording of the heart's electrical activity through repeated cardiac cycles. [4] It is an electrogram of the heart which is a graph of voltage versus time of the electrical activity of the heart [ 5 ] using electrodes placed on the skin.
Prenatal testing is a tool that can be used to detect some birth defects at various stages prior to birth. Prenatal testing consists of prenatal screening and prenatal diagnosis, which are aspects of prenatal care that focus on detecting problems with the pregnancy as early as possible. [1]
A pregnancy test detects the presence of the pregnancy hormone human chorionic gonadotropin in a person’s body. The body doesn’t produce that hormone until several days after conception.
Today, a dedicated fetal echocardiogram can detect nearly 100% of serious congenital heart disease. Yet most pregnant women do not have a fetal echocardiogram but rather undergo a general obstetric ultrasound that may detect only around a third of fetal heart disease. To improve detection, some propose universal fetal echocardiography. [2]
External cardiotocography can be used for continuous or intermittent monitoring. The fetal heart rate and the activity of the uterine muscle are detected by two transducers placed on the mother's abdomen, with one above the fetal heart to monitor heart rate, and the other at the fundus of the uterus to measure frequency of contractions.
An artifact is electrical activity detected by the EEG that comes a source that the scientist does not want to measure. Muscles create electrical activity in the range of 20–100 Hz, [ 12 ] and the uterine wall creates slow-wave activity and fast-wave activity related to the intrauterine pressure. [ 13 ]
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