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Related Experiment Videos

Electrocardiographic changes during cesarean section under regional anesthesia.

A J McLintic1, S D Pringle, S Lilley

  • 1Department of Anesthesia, Western Infirmary, Glasgow, Scotland.

Anesthesia and Analgesia
|January 1, 1992
PubMed
Summary

ST segment depression is common during cesarean sections under regional anesthesia. This electrocardiographic change is not caused by myocardial ischemia, but rather by increased heart rate during delivery.

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Area of Science:

  • Cardiology
  • Obstetrics
  • Anesthesiology

Background:

  • Cesarean sections under regional anesthesia can cause electrocardiographic (ECG) changes.
  • The cause of these ECG changes, specifically ST segment depression, is not fully understood.
  • Myocardial ischemia is a potential concern during surgical procedures.

Purpose of the Study:

  • To investigate electrocardiographic (ECG) changes during cesarean section.
  • To determine if ST segment depression indicates myocardial ischemia in this context.
  • To explore the relationship between ECG changes and hemodynamic factors.

Main Methods:

  • Continuous ECG monitoring using Holter in 25 patients undergoing cesarean section.
  • Two-dimensional echocardiography in 13 patients to assess cardiac wall motion.

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  • Comparison of ECG findings with echocardiographic data and heart rate at delivery.

    • Main Results:

    • ST segment depression occurred in 16 out of 25 patients (64%).
    • Echocardiography showed normal wall motion during ST depression episodes, ruling out ischemia.
    • Patients with ST depression had significantly higher heart rates at delivery.

    Conclusions:

    • ST segment depression is a frequent finding during cesarean section under regional anesthesia.
    • These ECG changes are not indicative of myocardial ischemia.
    • Increased heart rate is likely the primary cause of ST segment depression in this setting.