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Intrapartum Fetal Heart Rate Monitoring - Perinatology.com
http://www.perinatology.com/Fetal%20Monitoring/Intrapartum%20Monitoring.htm
Baseline variability is defined as fluctuations in the fetal heart rate of more than 2 cycles per minute. No distinction is made between short-term variability (or beat-to-beat variability or R-R wave period differences in the electrocardiogram) and long-term variability. Grades of fluctuation are based on amplitude range (peak to trough):
Fetal Heart Rate Variability - Learning about Electronics
http://www.learningaboutelectronics.com/Articles/Fetal-heart-rate-variability.php
Absent variability means that there is a difference between 0 and 5 bpm in a fetus's heart rate for a given period of time. The second type is moderate variability. Moderate variability means there is a difference between 6 and 25 bpm in a fetus's heart rate for a given period of time. The third type is marked variability.
Fetal electrocardiography: feasibility of long-term fetal …
https://pubmed.ncbi.nlm.nih.gov/19076966/
Fifteen-hour recordings of fetal heart rate (FHR) were performed in 150 pregnant women at 20-40 weeks of gestation and 1-hour recordings were performed in 22 women in labour and compared with simultaneous scalp electrode recordings. When >or=60% of fECG signals was present, the recording was defined as good.
Fetal Heart Tracing: All You’ll Ever Need to Know - Flo
https://flo.health/pregnancy/giving-birth/labor-and-delivery/fetal-heart-tracing
Tachycardia occurs when the fetal heart rate baseline is above 160 bpm. Bradycardia, in contrast, is when the fetal heart rate baseline falls below 110 bpm. Variability describes fluctuations in the baseline FHR, whether in terms of frequency, amplitude, or magnitude. Normal variability is a bandwidth value from 5 to 25 bpm.
QCOM - Fetal Heart Monitoring - Baseline Variability
http://ob-efm.com/2405.htm
Long term variability (LTV) represents the amplitude changes of the normal baseline over time, with a cyclic changes occurring in less than one minute. The NICHD does not distinguish between LTV and STV, because they are viewed as a unit when the FHR is visually analyzed.
Fetal Heart Tracings M3 Clerkship Orientation
http://www.stritch.luc.edu/lumen/MedEd/obgyne/lectures/Fetal_Heart_Rate_Interpretation_2016.pdf
Most often FETAL HEART RATE PATTERNS ARE ASSESSED IN THE CONTEXT OF UTERINE CONTRACTIONS Contractions are measured over a 10 minute time span, averaged over 30 minutes Normal –5 or less in 10 minute period Tachysystole –6 or more in a 10 minute time period Decels are recurrent if they happen with at least ½ of the contractions UTERINE ACTIVITY
Interpretation of the Electronic Fetal Heart Rate During …
https://www.aafp.org/afp/1999/0501/p2487.html
Baseline fetal heart rate is 130 to 140 beats per minute (bpm), preserved beat-to-beat and long-term variability. Accelerations last for 15 or more seconds above baseline and peak at 15 or more bpm.
Fetal Heart Rate Monitoring and VEAL CHOP MINE in …
https://nurseship.com/fetal-heart-rate-monitoring-veal-chop-nursing/
Long-term variability is the waviness or rhythmic fluctuations. Its described as cycles per minute and the frequency of cycles is 3 to 6 per minute. Long-term variability is categorized as: Absent – amplitude undetectable Minimal – amplitude is between 0 to 5 bpm Moderate – amplitude is between 6 to25 bpm
Fetal heart rate tracing interpretation in cases of fetal heart block ...
https://onlinelibrary.wiley.com/doi/10.1002/ccr3.5448?af=R
Fetal heart rate (FHR) accelerations and FHR variabilities are mainly influenced by push-pull effects of sympathetic and parasympathetic impulses generated by well-oxygenated CNS and myocardium. 1 Hypoxic fetuses show no accelerations and variabilities, suggesting poor oxygenation in fetal CNS and myocardium.
Basic Pattern Recognition – Electronic Fetal Monitoring
https://www.ob-efm.com/efm-basics/basic-pattern-recognition/
Long term variability (LTV) represents the amplitude changes of the normal baseline over time, with a cyclic changes occurring in less than one minute. The NICHD does not distinguish between LTV and STV, because they are viewed as a unit when the FHR is visually analyzed.
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