Why the study?
Does twin pregnancy alter cardioautonomic control compared to singleton pregnancy?
Does twin pregnancy alter cardioautonomic control compared to singleton pregnancy?
Healthy twin pregnancies exhibit greater sympathetic and reduced parasympathetic cardiac control compared to singleton pregnancies, achieved through upward resetting of the cardiovagal baroreflex.
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Twin vs singleton autonomic differences should not yet alter practice; hypothesis-generating for longitudinal studies on maternal outcomes.
Individuals with healthy twin pregnancies had lower overall heart rate variability compared with those with singleton pregnancies at similar gestational ages. These results suggest a greater sympathetic and reduced parasympathetic contribution to cardiac control in twin pregnancies. Baseline heart rate was elevated, while arterial pressure and spontaneous cardiovagal baroreflex gain were not different between groups. This was result of the upward resetting of the cardiovagal baroreflex during healthy twin pregnancy, thus maintaining arterial pressure.
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Meah et al. (2020) studied this question.
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