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Hypertension
and
coronarY
heart
disease
are common
dis-
eases'normatty
found on
middte-aged
and older people.
Most
of
these
patienti
may
need invasive treatments.
Then,
the patients
and their families
have
to decide whether
to
receive
surgerY
or
not.
They
have
to
consider
both the
risks
and
the
possible benefits
from
the'surgery.
The
first thing
to
consider
is
the
condition
of
the
patientE
iardiac
function.
Patients
should
receive chest
x-ray
'examination,
electrocardiographic examination,
blood
9xygery
analysis, and
liver,
renal and p,ulmonary
function
tests
at
the
vari-
ous'medical
laboratories.
lt
is
also important
to
make
primary
judgement
on
the
patient's
cardiac
function
acco.rding
to
their
'me-dicat
history, symptoms and results
from
many
simple
tests.
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