Short-term variability of fetal heart rate during pregnancies with normal and insufficient placental function

Kariniemi, V.; Ämmälä, Pirkko

doi:10.1016/0002-9378(81)90407-5

Cited by 44 publications

(15 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The period of aFECG from which FHRV analysis is calculated is called sample time [5]. The clinical studies on antepartal FHRV made by our group have been performed using a sample time of five minutes [8]. The effect of sample time on variability indices was studied in 76 pregnancies.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Antepartal analysis of fetal heart rate variability by abdominal electrocardiography

Kariniemi¹,

Siimes²,

Ämmälä³

1982

Journal of Perinatal Medicine

View full text Add to dashboard Cite

Antepartal analysis of fetal heart rate variability (FHRV) has been shown to be of value in predicting fetal distress in labor [8]. Abdominal fetal electrocardiograin (aFECG) is used äs a trigger signal in the statistical analysis of intervals and the differences between them [7]. The indices of variability thus obtained have a good correlation with indices calculated simultaneously from direct FECG [6,12]. Interval index (II) describes the long-term variability and differential index (DI) the short-term variability in this analysis. The main disadvantage of this analysis System is a fairly high failure rate of aFECG during the third trimester of pregnancy. Gestational age, the electrode position and the maternal position have been shown to affect the recordability of aFECG [l, 2, 3, 4, 9, 11]. On the other hand, maternal obesity, placental location and the state of the membranes have been shown not to have any effect on the quality of aFECG [l, 3, 9]. The aim of this study was to investigate how often FHRV analysis made by aFECG succeeds and what is the role of certain methodological factors in the recording procedure. Patients and methodsFHRV analyses were performed by a previously described method using an on-line microprocessor system [7]. The analysis was regarded äs a failure when less than 30% of the intervals detected were accepted in the analysis. Student's paired t-test (one-sided) was used to measure the significance of the results.2.2 Maternal position in FHRV analysis. The maternal supine vs. 90-degree lateral position was studied relating to the success rate and to the variability indices in 30 pregnancies. A five-minute analysis was fiist attempted in the supine position immediately followed by a 90-degree lateral position. The maternal supine and 15-degree lateral positions were similarly compared in 30 pregnancies.

show abstract

Section: Methodsmentioning

confidence: 99%

“…

…”

mentioning

confidence: 99%

Antepartal analysis of fetal heart rate variability by abdominal electrocardiography

Kariniemi¹,

Siimes²,

Ämmälä³

1982

Journal of Perinatal Medicine

View full text Add to dashboard Cite

show abstract

“…With a rejection limit of five bpm, even these DI values fall within the normal range. We have collected some evidence from fetal studies that the valid information of fetal heart rate variability is in those beat-tobeat differences not exceeding five bpm [5,10,11]. Low indices of NHRV have been reported in association with idiopathic respiratory distress syndrome and prematurity [2,8].…”

Section: Discussionmentioning

confidence: 99%

Analysis of neonatal heart rate variability by a microprocessor-based on-line system

Kariniemi¹,

Rovamo²,

Pohjavuori³

1985

Journal of Perinatal Medicine

View full text Add to dashboard Cite

“…The reference material consisted of 65 strictly normal pregnancies with good fetal outcome [12]. The first lower percentile of antepartal differential indices (DI) in this reference material was used as the normal limit of DI.…”

Section: Normal Pregnanciesmentioning

confidence: 99%

“…Therefore, detection of fetuses at risk of fetal distress is still an important problem in managing diabetic pregnancies. Decreasing variability of FHR has been claimed to be prognostic for poor fetal outcome in other high risk pregnancies [8,12,15,22,18]. In the present study, the short term variability of antepartal FHR was quantitated in order to assess its clinical significance as a predictor of intrapartal fetal distress in insulindependent diabetic pregnancies.…”

Section: Introductionmentioning

confidence: 99%

Short term variability of fetal heart rate during insulin-dependent diabetic pregnancies

Ämmälä¹,

Kariniemi²

1983

Journal of Perinatal Medicine

View full text Add to dashboard Cite

Short-term variability of fetal heart rate during pregnancies with normal and insufficient placental function

Cited by 44 publications

References 7 publications

Antepartal analysis of fetal heart rate variability by abdominal electrocardiography

Antepartal analysis of fetal heart rate variability by abdominal electrocardiography

Analysis of neonatal heart rate variability by a microprocessor-based on-line system

Short term variability of fetal heart rate during insulin-dependent diabetic pregnancies

Contact Info

Product

Resources

About