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The incidence
of
cardiovascular events
including
unstable
an-
gina
pectoris, myocardial infarction
and sudden death is
as
high
as
or
even
higher
in
silent
(asymptomatic)
myocardial ischemia
than
in symptomatic myocardial
ischemia. Due to negligence
in
the
ab-
sence
of
symptoms, asymptomatic myocardial
ischemia confers
a
greater risk. lschemic
episodes
have significant regularity.
The
peak
time
of
onset
is
at
6a.m.-noon.
Administration of
beta-blocker
or
low-dose aspirin
to
reduce
the platelet-aggregation, dilatation
of
coronary artery, and
avoid-
ance
of
sudden
raise
of
blood pressure to prevent the rupture
of
arteriosclerotic plaques,
can
significantly reduce the frequency
of
asymptomatic myocardial ischemic episodes
and
cardiovascular
events.
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