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Fetal Echocardiography and Pulsed-wave Doppler Ultrasound in a Rabbit Model of Intrauterine Growth Restriction
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Respuesta de la frecuencia cardíaca fetal al esfuerzo materno
M W Carpenter1, S P Sady, B Hoegsberg
1Department of Obstetrics and Gynecology, Women and Infants Hospital, Providence, RI 02905.
JAMA
|May 27, 1988
Resumen
El ejercicio materno durante el embarazo es generalmente seguro para la frecuencia cardíaca fetal. Sin embargo, el esfuerzo máximo puede conducir a bradicardia fetal, lo que justifica una mayor investigación sobre el bienestar fetal.
Área de la Ciencia:
- Obstetricia y Ginecología.
- Fisiología fetal fisiología fetal.
- Ciencias del ejercicio Ciencia del ejercicio.
Sus antecedentes:
- El monitoreo Doppler anterior sugirió bradicardia fetal durante el esfuerzo materno, lo que plantea preocupaciones de seguridad.
- Los métodos Doppler para la evaluación de la frecuencia cardíaca fetal durante el ejercicio vigoroso de la madre son desafiantes debido a los artefactos de movimiento.
Objetivo del estudio:
- Para determinar la incidencia de bradicardia fetal durante el ciclo materno, se realizan pruebas con ergómetro.
- Para evaluar el impacto del esfuerzo materno submáximo versus máximo en la frecuencia cardíaca fetal.
Principales métodos:
- La frecuencia cardíaca fetal fue monitoreada utilizando ecografía bidimensional en 45 mujeres embarazadas.
- Los participantes se sometieron a 85 pruebas de ergómetro de ciclo submáximo y 79 de ciclo máximo.
- La bradicardia fetal se definió como la frecuencia cardíaca <110 latidos por minuto durante >=10 segundos.
Principales resultados:
- El promedio de la frecuencia cardíaca fetal no mostró cambios significativos durante el ejercicio.
- Un episodio de bradicardia fetal ocurrió durante el esfuerzo submáximo.
- Se observaron dieciséis episodios de bradicardia fetal después del ejercicio, predominantemente después del esfuerzo máximo.
Conclusiones:
- El ejercicio materno submáximo breve (hasta ~70% de la potencia aeróbica máxima) no parece afectar la frecuencia cardíaca fetal.
- El máximo esfuerzo materno es frecuentemente seguido por bradicardia fetal, lo que potencialmente indica un cambio de gases fetal alterado.
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