I
N SUMMARY�HST 071
M
ATERNAL PHYSIOLOGIC CHANGES IN PREGNANCY
M
ATERNAL PHYSIOLOGY
C
ardiovascular System
•�H
eart size increases 12%
•�M
urmurs (systolic and diastolic)
•�E
CG changes similar to ischemia but due to positional changes
•�E
xtrasystoles, supraventricular tachycar
d
ia
•�O
utput rises 1.5 liters/minute
•�H
eart rate rises from 70 to 85 beats per minute
•�S
troke volume rises from 63 to 70 ml
•�A-V
oxygen difference drops near e nd of first tri
a
gain
•�B
lood pressure
–�S
ystolic unchanged
–�D
iast
o
lic drops in mid
-p
regnancy
–�I
ncreases again near term
•�P
ulse pressure higher
mester from 44 to 33 ml/l but then rises
•�V
enous pressure unchanged in the arms and raised in the legs
•�P
eripheral resistance drops
•�P
ulmonary pressure unchanged
•�C
irculation time unchanged
Figure removed due to copyright restrictions. Please see:
Elkayam, Uri, and Norbert Gleicher, eds. Cardiac Problems in Pregnancy : Diagnosis and Management of Maternal and Fetal Disease.
2nd ed. New York, NY: Liss, 1990, p. 61. ISBN: 0471505005 .
docsity.com
