RT Book, Section
A1 Sherman, Caitlin
A1 Gauthier, Mandeep
A1 David, Marianne
A2 Freeman, Brian S.
A2 Berger, Jeffrey S.
SR Print(0)
ID 1135743203
T1 Supine Hypotensive Syndrome of Pregnancy
T2 Anesthesiology Core Review: Part Two Advanced Exam
YR 2016
FD 2016
PB McGraw-Hill Education
PP New York, NY
SN 9781259641770
LK accessanesthesiology.mhmedical.com/content.aspx?aid=1135743203
RD 2024/04/25
AB Although  cardiac  output  increases  by  30%–40%,  blood  pressure  is  normally  lower  during  pregnancy  due  to  a  15%  decrease  in  systemic  vascular  resistance.  Furthermore,  in  the  supine  position,  venous  return  decreases  and  cardiac  output  can  be  significantly  affected  with  a  drop  of  25%–30%  in  the  latter  half  of  pregnancy  (>20  weeks)  when  aortocaval  compression  is  at  its  greatest.  This  compression  of  the  aorta  and  the  inferior  vena  cava  against  the  lumbar  vertebral  bodies  results  in  decreased  venous  return  from  the  lower  extremities,  thereby  decreasing  preload,  stroke  volume  and  cardiac  output.