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Fetal response to cardiopulmonary bypass
Obstetrics and Gynecology
|July 1, 1980
Summary
Fetal heart rate (FHR) monitoring during maternal mitral valve replacement showed significant drops and variability loss during cardiopulmonary bypass. Post-bypass, FHR normalized, and the infant was born healthy at 30 weeks gestation.
Area of Science:
- Cardiology
- Maternal-Fetal Medicine
- Cardiac Surgery
Background:
- Mitral valve replacement during pregnancy is rare.
- Continuous fetal heart rate (FHR) monitoring is crucial for assessing fetal well-being during maternal cardiac procedures.
- Understanding FHR response to cardiopulmonary bypass (CPB) is vital for managing high-risk pregnancies.
Observation:
- Fetal heart rate (FHR) was continuously monitored using ultrasonography in a 22-week pregnant patient undergoing mitral valve replacement.
- FHR changes were analyzed in correlation with the distinct phases of cardiopulmonary bypass (CPB).
Findings:
- A substantial decrease in baseline FHR and initial loss of variability were observed during CPB.
- Following the CPB period, a transient episode of fetal tachycardia occurred.
- FHR subsequently stabilized to preoperative levels after the procedure.
Implications:
- This case demonstrates the feasibility of continuous FHR monitoring during complex cardiac surgery in pregnancy.
- The observed FHR patterns provide insights into fetal tolerance of CPB.
- Successful surgical intervention and favorable neonatal outcome highlight the importance of multidisciplinary care in managing pregnant patients with severe valvular heart disease.