Validation of a new algorithm for the short-term variation of the fetal heart rate: an antepartum prospective study

2018 ◽  
Vol 46 (6) ◽  
pp. 599-604 ◽  
Author(s):  
Christina Kouskouti ◽  
Hella Jonas ◽  
Kerstin Regner ◽  
Pia Ruisinger ◽  
Julia Knabl ◽  
...  
Keyword(s):  
Heart Rate ◽  
Reference Values ◽  
Fetal Heart Rate ◽  
Fetal Heart ◽  
Normal Values ◽  
Short Term ◽  
Mean Values ◽  
Relevant Reference ◽  
Term Variation ◽  
The Mean

Abstract Aims: Currently one of the most widespread systems for the computerized analysis of the fetal heart rate (FHR) is the Dawes-Redman system, where the short-term variation (STV) of the FHR is measured by dividing each minute into 16 segments (STV16). Technical progress has allowed for the development of a new algorithm, which measures the STV by dividing each minute into 240 segments (STV240), thus approximating the beat-to-beat variation. The STV240 still lacks reference values. Our aim was to develop clinically relevant reference values for the STV240 and compare them to the ones for the STV16. Methods: In a single centre, observational study, a total of 228 cardiotocograms were registered and subsequently analyzed with both algorithms (STV240 and STV16). Results: The 95% confidence interval (CI) was calculated for both algorithms. The values of the STV240 were significantly lower in comparison to the ones of the STV16. Not only the mean values but also the 95th percentile of the STV240 lay beneath the existent cut-off value for the STV16. Conclusions: Every clinician using the new algorithm must be aware that the normal values for the STV240 lie beneath the, up until now, established cut-off values for the STV16.

scholarly journals Fetal heart rate short term variation during labor in relation to scalp blood lactate concentration

2018 ◽  
Vol 97 (10) ◽  
pp. 1274-1280 ◽  
Author(s):  
Ke Lu ◽  
Malin Holzmann ◽  
Fahrad Abtahi ◽  
Kaj Lindecrantz ◽  
Pelle G Lindqvist ◽  
...  
Keyword(s):  
Heart Rate ◽  
Blood Lactate ◽  
Fetal Heart Rate ◽  
Fetal Heart ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Short Term ◽  
Term Variation

scholarly journals Fetal heart rate monitoring of short term variation (STV): a methodological observational study

2016 ◽  
Vol 16 (1) ◽  
Author(s):  
Stina Wretler ◽  
Malin Holzmann ◽  
Sophie Graner ◽  
Pelle Lindqvist ◽  
Susanne Falck ◽  
...  
Keyword(s):  
Heart Rate ◽  
Observational Study ◽  
Fetal Heart Rate ◽  
Fetal Heart ◽  
Heart Rate Monitoring ◽  
Short Term ◽  
Fetal Heart Rate Monitoring ◽  
Term Variation

Short-Term Variation of the Fetal Heart Rate for Predicting Neonatal Acidosis in Preeclampsia

2015 ◽  
Vol 38 (3) ◽  
pp. 179-185 ◽  
Author(s):  
Eva Marie Aernout ◽  
Patrick Devos ◽  
Philippe Deruelle ◽  
Véronique Houfflin-Debarge ◽  
Damien Subtil
Keyword(s):  
Heart Rate ◽  
Fetal Heart Rate ◽  
Fetal Heart ◽  
Maternity Hospital ◽  
Short Term ◽  
Rate Analysis ◽  
Term Variation ◽  
Level 3 ◽  
Heart Rate Analysis ◽  
Singleton Pregnancies

Introduction: The aim of this study was to measure the performance of short-term variation (STV) in predicting the onset of neonatal acidosis in fetuses at risk due to maternal preeclampsia. Material and Methods: This retrospective study examined data from a series of 159 women with singleton pregnancies, hospitalized for preeclampsia in a level 3 reference maternity hospital in northern France, with an STV measurement in the 24 h preceding cesarean delivery and a measurement of the newborn's arterial cord pH at birth. The main outcome was determined by a correlation between STV and neonatal pH. Results: The last computerized fetal heart rate analysis took place a mean of 7.9 ± 6.3 h before birth, and neonatal acidosis was diagnosed in 38 newborns (23.9%). Although STV and umbilical artery pH at birth were significantly correlated (ρ = 0.16, p < 0.05), the performance of STV in predicting neonatal acidosis was poor, with an area under the ROC curve of 0.63. The sensitivity reached only 50.0% and the specificity 71.9% at the best STV threshold for predicting acidosis. Conclusion: The performance of STV for screening for neonatal acidosis is poor in women with preeclampsia. The divergent results between studies are probably due to the variable intervals between STV measurement and birth.

scholarly journals Is short-term-variation of fetal-heart-rate a better predictor of fetal acidaemia in labour? A feasibility study

PLoS ONE ◽  
2020 ◽  
Vol 15 (8) ◽  
pp. e0236982
Author(s):  
Habiba Kapaya ◽  
Richard Jacques ◽  
Thomas Almond ◽  
Miss Hilary Rosser ◽  
Dilly Anumba
Keyword(s):  
Heart Rate ◽  
Feasibility Study ◽  
Fetal Heart Rate ◽  
Fetal Heart ◽  
Short Term ◽  
Term Variation

Short-term variation In abnormal antenatal fetal heart rate records

1991 ◽  
Vol 165 (3) ◽  
pp. 515-523 ◽  
Author(s):  
P. Street ◽  
G.S. Dawes ◽  
M. Moulden ◽  
C.W.G. Redman
Keyword(s):  
Heart Rate ◽  
Fetal Heart Rate ◽  
Fetal Heart ◽  
Short Term ◽  
Term Variation

Longitudinal Course of Short-Term Variation and Doppler Parameters in Early Onset Growth Restricted Fetuses

2019 ◽  
Vol 41 (06) ◽  
pp. e23-e32
Author(s):  
Friederike Baier ◽  
Leonie Weinhold ◽  
Florian M. Stumpfe ◽  
Sven Kehl ◽  
Jutta Pretscher ◽  
...  
Keyword(s):  
Heart Rate ◽  
Fetal Heart Rate ◽  
Fetal Heart ◽  
Generalized Additive Models ◽  
Additive Models ◽  
Time Interval ◽  
Short Term ◽  
Significant Deterioration ◽  
Term Variation ◽  
Doppler Indices

Abstract Purpose To evaluate the longitudinal pattern of fetal heart rate short term variation (STV) and Doppler indices and their correlation to each other in severe growth restricted (IUGR) fetuses. Materials and Methods In this retrospective study, pregnancies with a birth weight below the 10th percentile, born between 24 and 34 gestational weeks with serial Doppler measurements in combination with a computerized CTG (cCTG) with calculated STV were included. Longitudinal changes of both Doppler indices and STV values were evaluated with generalized additive models, adjusted for gestational age and the individual. For all measurements the frequency of abnormal values with regard to the time interval before delivery and Pearson correlations between Doppler indices and STV values were calculated. Results 41 fetuses with a total of 1413 observations were included. Over the course of the whole study period, regression analyses showed no significant change of STV values (p = 0.38). Only on the day of delivery, a prominent decrease was observed (mean STV d28-22: 7.97 vs. mean STV on day 0: 6.8). Doppler indices of UA and MCA showed a continuous, significant deterioration starting about three weeks prior to delivery (p = 0.007; UA and p < 0.001, MCA). Correlation between any Doppler index and STV values was poor. Conclusion Fetal heart rate STV does not deteriorate continuously. Therefore, cCTG monitoring should be performed at least daily in these high-risk fetuses. Doppler indices of umbilical artery (UA) and middle cerebral artery (MCA), however, showed continuous deterioration starting about 3 weeks prior to delivery.

scholarly journals Determination of fetal heart rate short‐term variation from umbilical artery Doppler waveforms

2020 ◽  
Vol 57 (1) ◽  
pp. 70-74
Author(s):  
L. S. Cahill ◽  
G. Stortz ◽  
A. Ravi Chandran ◽  
N. Milligan ◽  
S. Shinar ◽  
...  
Keyword(s):  
Heart Rate ◽  
Fetal Heart Rate ◽  
Umbilical Artery ◽  
Fetal Heart ◽  
Short Term ◽  
Term Variation ◽  
Umbilical Artery Doppler
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