<s>
Stokes	B-Algorithm
–	I-Algorithm
Adams	I-Algorithm
syndrome	I-Algorithm
or	O
Adams	B-Algorithm
–	I-Algorithm
Stokes	I-Algorithm
syndrome	I-Algorithm
is	O
a	O
periodic	O
fainting	O
spell	O
in	O
which	O
there	O
is	O
intermittent	O
complete	B-Architecture
heart	I-Architecture
block	I-Architecture
or	O
other	O
high-grade	O
arrhythmia	O
that	O
results	O
in	O
loss	O
of	O
spontaneous	O
circulation	O
and	O
inadequate	O
blood	O
flow	O
to	O
the	O
brain	O
.	O
</s>
<s>
It	O
is	O
characterized	O
by	O
an	O
abrupt	O
decrease	O
in	O
cardiac	O
output	O
and	O
loss	O
of	O
consciousness	O
due	O
to	O
a	O
transient	O
arrhythmia	O
;	O
for	O
example	O
,	O
bradycardia	O
due	O
to	O
complete	B-Architecture
heart	I-Architecture
block	I-Architecture
.	O
</s>
<s>
Paroxysmal	B-Algorithm
supraventricular	I-Algorithm
tachycardia	I-Algorithm
or	O
atrial	O
fibrillation	O
has	O
been	O
reported	O
as	O
the	O
underlying	O
cause	O
in	O
up	O
to	O
5%	O
of	O
patients	O
in	O
one	O
series	O
.	O
</s>
<s>
Stokes	B-Algorithm
–	I-Algorithm
Adams	I-Algorithm
attacks	I-Algorithm
may	O
be	O
diagnosed	O
from	O
the	O
history	O
,	O
with	O
paleness	O
prior	O
to	O
the	O
attack	O
and	O
flushing	O
after	O
it	O
particularly	O
characteristic	O
.	O
</s>
<s>
The	O
ECG	B-Application
will	O
show	O
complete	B-Architecture
heart	I-Architecture
block	I-Architecture
,	O
high	O
grade	O
AV	O
block	O
,	O
or	O
other	O
malignant	O
arrhythmia	O
during	O
the	O
attacks	O
.	O
</s>
<s>
Torsades	B-Algorithm
de	I-Algorithm
Pointes	I-Algorithm
can	O
occur	O
in	O
a	O
heart	O
block	O
setting	O
.	O
</s>
<s>
Temporary	O
cardiac	B-Device
pacing	I-Device
may	O
also	O
be	O
used	O
in	O
a	O
closely	O
monitored	O
setting	O
.	O
</s>
<s>
However	O
,	O
definitive	O
treatment	O
includes	O
the	O
insertion	O
of	O
a	O
permanent	O
cardiac	O
pacemaker	B-Device
.	O
</s>
<s>
If	O
undiagnosed	O
(	O
or	O
untreated	O
)	O
,	O
Stokes	B-Algorithm
–	I-Algorithm
Adams	I-Algorithm
attacks	I-Algorithm
have	O
a	O
50%	O
mortality	O
within	O
a	O
year	O
of	O
the	O
first	O
episode	O
.	O
</s>
