Effects of heart rate on ventricular size, stroke volume, and output in the normal human fetus: a prospective Doppler echocardiographic study.

@article{Kenny1987EffectsOH,
  title={Effects of heart rate on ventricular size, stroke volume, and output in the normal human fetus: a prospective Doppler echocardiographic study.},
  author={James F. Kenny and Ted Plappert and Peter M. Doubilet and Donna Salzman and Martin Sutton},
  journal={Circulation},
  year={1987},
  volume={76 1},
  pages={52-8}
}
The effect of heart rate on cardiac output in the fetal heart is controversial. We used Doppler echocardiography to investigate the effects of increasing heart rate on stroke volume and ventricular output in the normal human fetal heart. Heart rate was increased in 25 human fetuses (mean age 36 weeks) by auditory stimulation with a sound emitter placed on the mother's abdomen. Aortic or pulmonary diameters were measured at valve level from two-dimensional echocardiographic images and cross… CONTINUE READING
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