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Effect of weight gain during pregnancy on heart rate variability and hypotension during caesarean section under spinal anaesthesia
Author(s) -
Ghabach M. B.,
ElKhatib M. F.,
Zreik T. G.,
Matta M. S.,
Mouawad J. J.,
Karam C. J.,
Ayoub C. M.
Publication year - 2011
Publication title -
anaesthesia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.839
H-Index - 117
eISSN - 1365-2044
pISSN - 0003-2409
DOI - 10.1111/j.1365-2044.2011.06873.x
Subject(s) - medicine , caesarean section , anesthesia , heart rate , elective caesarean section , pregnancy , spinal anesthesia , weight gain , obstetrics , body mass index , incidence (geometry) , body weight , blood pressure , genetics , physics , optics , biology
The purpose of this study was to assess the effect of antenatal weight gain on baseline heart rate variability and incidence of hypotension in singleton parturients with a normal pre-pregnancy body mass index, presenting at term for elective caesarean section under spinal anaesthesia. Sixty-six parturients, of ASA physical status 1-2, were allocated to one of three groups according to their weight gain during pregnancy: < 11 kg; 11-16 kg; and > 16 kg. Mean (SD) approximate entropy of baseline heart rate was significantly higher in the < 11 kg group (0.27 (0.11)) compared with the 11-16 kg group (0.14 (0.08)) and the > 16 kg group (0.14 (0.07)) (both p < 0.001). The incidence of hypotension in the < 11 kg group (17/22; 77%) was significantly higher than in the 11-16 kg group (7/22; 32%) (p = 0.006) and the > 16 kg group (8/22; 36%) (p = 0.01). We conclude that weight gain < 11 kg during pregnancy is associated with increased baseline heart rate variability and a higher incidence of hypotension at the time of elective caesarean section under spinal anaesthesia.