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An ominous undulating fetal heart rate pattern

D S Ginsburg, E Hernandez, G A Schwemlein

Acta Obstetricia Et Gynecologica Scandinavica

|January 1, 1982

Summary

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A unique fetal heart rate (FHR) pattern, distinct from the classic sinusoidal pattern, was observed in three compromised fetuses. This novel FHR tracing may indicate a salvageable condition requiring urgent obstetric intervention.

Area of Science:

Perinatology
Fetal Monitoring
Obstetrics

Background:

Fetal heart rate (FHR) monitoring is crucial for assessing fetal well-being.
The sinusoidal FHR pattern is a recognized indicator of fetal distress.

Observation:

Three cases presented with a unique FHR tracing in severely compromised fetuses.
This pattern exhibited an undulating, "sinusoidal" shape with a frequency of 0.5-1 cpm and amplitude of 10-15 bpm.
A flattened baseline fluctuating between 60-120 bpm characterized this novel tracing.

Findings:

The observed FHR pattern differs significantly from previously described sinusoidal patterns.
This distinct pattern appears to identify fetuses in an agonal or pre-agonal state.
Despite the critical state, these fetuses were potentially salvageable.

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Implications:

This finding necessitates a re-evaluation of current FHR interpretation guidelines.
Prompt recognition of this specific FHR pattern may guide maximal obstetric intervention.
Early identification could improve outcomes for fetuses exhibiting this critical FHR abnormality.