High Blood Pressure during Pregnancy
Blood
Pressure
over
140/90
mm
Hg
should
be
considered
as
high
blood
pressure.
If
the
pressure
continues
after
the
20th
week
of
pregnancy
preeclampsia
can
develop.
We
are
not
entirely
sure
what
causes
increased
pressure
during
pregnancy.
Experts
believe
that
placental
pathology
may
be
contributing
to
it
in
some
way.
According
to
the
National
Heart,
Lung,
and
Blood
Institute
(NHLBI),
the
following
can
cause
hypertension during pregnancy:
•
Obesity
•
Smoking
•
Alcohol consumption
•
Pregnant for the 1st time
•
Pregnant with more than one baby
•
Being pregnant after 40.
•
IVF treatment
•
Family history of kidney disease, hypertension or preeclampsia
Increased
Blood
Pressure
during
Pregnancy
can
lead
to
Preeclampsia,
a
condition
that
can
occur
during
the
second
half
of
pregnancy
when
thare
is
protein
in
the
urine
in
addition
to
the
increased
blood
pressure.
It
occurs
in
2
to
6%
of
all
pregnancies.
If
untreated
it
will
lead
to
Eclampsia
causing
fits,
kidney
damage,
stroke
and
maternal
death.
It
can
also
cause
premature
separation
of
placenta
from
uterus
leading to foetal distress.
Monitoring and Prevention of Preeclampsia
During
prenatal
checks
blood
pressure
is
routinely
checked
and
if
necessary
treated.
Urine
is
also
checked
for
proteins.
Protein
in
the
urine
is
the
1st
sign
that
kidney
is
being
affected
from
preeclamsia.
Occasionally
protein
may
appear
in
the
urine
with
normal
blood
pressure
as
a
sign
that
trouble
is
brewing.
Oedema
of
hands
and
feet
and
persistent
headache
may
also
be
a
pointer
to
developing
preeclampsia.
If
the
woman
is
already
on
an
antihypertensive
because
of
preexistent
hypertension,
according
to
Mayo
Clinic,
ACE
inhibitors,
renin
inhibitors
and
angiotensin
receptor
blockers
should
be
avoided
as
they
pass
through
the
bloodstream
to
the
developing
baby
affecting
the
infant’s
health.
Methyldopa
and
labetalol
are both drugs that have been deemed safe for use to manage blood pressure during pregnancy.
Treatment of Preeclampsia:
Apart
from
medication
to
control
the
blood
pressure
treatment
may
also
require
emergency
preterm
delivery
to
prevent
a
serious
outcome
to
baby
and
mother.
In
most
cases
of
pre-eclampsia,
it
is
recommended
that
the
baby
is
delivered
at
37th
or
38th
week
of
pregnancy.
Magnesium
sulfate
should
be
considered
when
there
is
a
risk
of
fits
(eclampsia)
developing.
Magnesium
sulfate
reduces
the
risk
of
eclampsia
by
more
than
half.
Fluid
balance
must
also
be
monitored
carefully
to
avoid
the
risk
of
overload and pulmonary oedema (fluid in the lungs).
High
blood
pressure
during
pregnancy
can
also
have
an
effect
on
the
baby’s
growth
rate.
This
can
result
in
a
low
birth
weight.
According
to
the
American
Congress
of
Obstetricians
and
Gynecologists,
other
complications include:
•
preterm delivery (defined as delivery prior to 38 weeks of pregnancy)
•
caesarean sections
Controlling Blood Pressure during pregnancy:
Apart
from
drugs,
blood
pressure
can
also
be
controlled
during
pregnancy
by
Yoga,
simple
exercises
like
walking,
avoiding
any
stressful
activity,
meditation
and
listening
to
relaxing
music.
Of
course
alcohol
and tobacco must be strictly avoided.
Postpartum preeclampsia:
Postpartum
Preeclampsia
is
a
rare
condition
when
high
blood
pressure
develops
with
excess
protein
in
the
urine
soon
after
childbirth.
They
usually
develop
within
48
hours
of
childbirth
but
can
occur
up
to
six
weeks
after
childbirth.
It
is
therefore
important
to
instruct
women
at
the
time
of
discharge
from
hospital
regarding
the
risks
of
pre-eclampsia.
They
should
be
advised
to
seek
urgent
medical
assessment
if
they
develop any of the symptoms mentioned below.
Symptoms:
Symptoms
and
signs
are
similar
to
those
which
occurs
during
pregnancy.
They
are
Headaches,
Visual
disturbance,
Abdominal
pain
with
Vomitting,
Swelling
of
face
and
limbs.
Blood
pressure
will
increase
with kidney involvement leading to reduced urine formation and presence of protein in the urine.
Complications of Postpartum preeclampsia:
•
Eclampsia with all its complications
•
Difficulty breathing due to fluid build up in the lungs
•
Stroke and thromboembolism,
•
Low platelet count and haemolysis (destruction of red blood cells)
•
Abnormal liver function.
Treatment:
Women
developing
symptoms
after
discharge
should
be
readmitted
for
monitoring
and
getting
the
blood
pressure
under
control.
Treatment
of
postpartum
preeclampsia
is
similar
to
prenatal
preeclampsia.
BP
and
Urine
for
protein
must
be
checked
every
day
for
two
weeks
and
then
at
weekly
intervals
for
6
weeks.
Liver
function
test
and
platelet
count
must
also
be
done.
Medication
is
adjusted
according
to
the
level
of
BP
and
it
can
gradually
be
discontinued
once
the
BP
is
stable
(normal)
and
no
protein
in
the
urine is detected.
K. Badrinath, FRCS., MSc (Orth) (Lond)
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