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These irregular impulses may be referred to as arrhythmias or abnormal heart rhythms. The recordings made by the monitor help your doctor determine if your heart is getting enough oxygen or if the electrical impulses in the heart are delayed or early. The Holter monitor lets your doctor see how your heart functions on a long-term basis. Monitoring for a longer period of time is necessary to record these events. You may experience heart rhythm irregularities that don’t show up at the time the EKG is done because you’re only hooked up to the machine for a very brief amount of time.Ībnormal heart rhythms and other types of cardiac symptoms can come and go.

During an EKG, electrodes are placed on your chest to check your heart’s rhythm. It’s also used to look for other abnormalities that may affect normal heart function. Note, deceleration of more than 5 minutes with reduced variability and bradycardia often means acute fetal hypoxia.An EKG is a medical test that’s used to measure your heart rate and rhythm.

Prolonged decelerations last for longer than 3 minutes.

Variable decelerations vary in shape and size, and are also related to contractions. They exhibit good variability and recover rapidly to the baseline rate.

Variable decelerations constitute a rapid drop (reaching their lowest point less than 30 seconds after starting).

They tend to coincide with uterine contractions, and might be produced by compression of your fetus’ head rather than hypoxia.

Early decelerations are short and shallow, with normal variability.

It means your fetus is neurologically responsive and doesn’t have an oxygen deficiency.ĭecelerations represent a decrease in FHR of more than 15 bpm in bandwidth amplitude. (They start and reach maximum value in less than 30 seconds.) Accelerations last from 15 seconds to 10 minutes, and the majority occur in conjunction with fetal movements. Since it’s difficult to visually interpret this parameter, in borderline scenarios, your doctor must carefully reevaluate the results.Īccelerations represent a sudden increase in FHR of more than 15 bpm in bandwidth amplitude. When this variability presents itself in a fetal heart tracing, it could be caused by hypoxia of your fetus’ central nervous system.

Reduced variability is a bandwidth value below 5 bpm lasting for more than 50 minutes.

Increased variability is a bandwidth value exceeding 25 bpm that lasts for more than half an hour.

Normal variability is a bandwidth value from 5 to 25 bpm.

Variability describes fluctuations in the baseline FHR, whether in terms of frequency, amplitude, or magnitude.

Bradycardia, in contrast, is when the fetal heart rate baseline falls below 110 bpm.Tachycardia occurs when the fetal heart rate baseline is above 160 bpm.A normal baseline rate ranges from 110 to 160 bpm. These segments help establish an estimated baseline (for a duration of 10 minutes) which is expressed in beats per minute. Your doctor analyzes FHR by examining a fetal heart tracing according to baseline, variability, accelerations, and decelerations.īaseline is calculated as a mean of FHR segments that are the most horizontal, and also fluctuate the least.