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Plan du cours

  1. L’analyse du RCF (Verrouillé)
    1. Une double problématique (Verrouillé)
    2. Quelques précisions (Verrouillé)
    3. Les données cardiotocographiques
      1. L’analyse de l’activité contractile
      2. La fréquence cardiaque (Verrouillé)
      3. Les accélérations (Verrouillé)
      4. Les ralentissements (Verrouillé)
      5. La variabilité à long terme (Verrouillé)
    4. Quelques remarques (Verrouillé)
    5. Ultérieurement… (Verrouillé)
    6. Des exemples de tracés numériques (Verrouillé)
Compte gratuit (Verrouillé)

La variabilité à long terme

Dernier critère de l’analyse du RCF, la variabilité visuelle du RCF ou variabilité à long terme (VLT) est le critère essentiel.

La VLT, visible, est estimée par périodes de 1 minute hors accélérations et ralentissements. On distingue 4 classes de VLT : marquée ou saltatoire (> 25 bpm), normale (6 - 25 bpm), minime (< 6 bpm) et absente (< 2 bpm) (Fig. 1.36). Des épisodes brusques et erratiques de variabilité saltatoire de plus de 1 minute sont appelés "ZigZag pattern" (Fig. 1.39) (Gracia-Perez 2019[13]).

Références

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