hypertension in pregnancy Flashcards
what is needed to diagnose hypertension in pregnancy
bp > = 140/90 on 2 occasions
or
>= 160/110 on 1 occasion
or an increase from booking readings of > 30/15
what is pre-existing hypertension
diagnosis prior to pregnancy
if hypertension is found early in pregnancy what is it most likely to be
pre-existing
what are some risks of pre-existing hypertension
PET
IUGR
abruption
what is the time scale of pregnancy induced hypertension
from 20 weeks of pregnancy
resolves within 6 weeks of delivery
would you get proteinuria with PIH
no
is the rate of recurrence of PIH high or low
high
what are the 3 features of pre-eclampsia
hypertension
proteinuria
oedema
what is classed as proteinuria in pre-eclampsia
> 0.3g/L
or
0.3g/24hr
do all people with pre-eclampsia have oedema
no
can pre-eclampsia be asymptomatic
at time of presentation yes
why does BP fall in pregnancy initially
vasodilation
what is an organ largely affected by pre-eclampsia
liver
when does pre-eclampsia occur
after 20 weeks
what is the presentation of pre-eclampsia (9)
hypertension headache (cerebral oedema) visual disturbance papilloedema RUQ/epigastric pain sudden onset oedema N+V hyperreflexia, clonus platelets < 100 x 10^6/L, abnormal liver enzymes or HELLP syndrome
what is HELLP syndrome
haemolysis
elevated liver enzymes
low platelets
high morbidity/mortality
what is early pre-eclampsia
< 34 weeks
what is late pre-eclampsia
> = 34 weeks
what placental disease can pre-eclampsia cause
FGR
placental abruption
intrauterine death
what kind of pre-eclampsia is more common
late
what is early pre-eclampsia assoc. with re the placenta
extensive villous and vascular lesions
which kind of pre-eclampsia has a higher risk of complications
early
are there placental lesions in late pre-eclampsia
minimal
what are some RFs for pre-eclampsia
HT disorder in previous pregnancy/HT CKD CTD thrombophilias AID e.g. SLE or APS DM (type 1 or 2) first pregnancy age 40 + pregnancy interval of 10+ years BMI of 30 + fmhx of PET multiple pregnancy previous PE molar pregnancy/triploidy
what can pre-eclampsia develop into if poorly controlled
eclampsia
what is the pathogenesis of pre-eclampsia generally
defective deep placentation - injured placenta then releases factors into the maternal circulation that induces pre-eclampsia
what is the first stage of pre-eclampsia pathophysiology
abnormal placental perfusion leading to placental ischaemia
what is the second stage of pre-eclampsia pathophysiology
maternal syndrome - anti-angiogenic state assoc. with endothelial dysfunction
what kind of state is maternal syndrome in pre-eclampsia
anti-angiogenic
pre-eclampsia involves abnormal placentation and ____ invasion
trophoblast
in pre-eclampsia _____ arteries fail to become low resistance leading to _____ damage and placental ischaemia
spiral arteries - fail to lose muscle layer
widespread endothelial damage