<s>
Lev	B-Algorithm
's	I-Algorithm
disease	I-Algorithm
is	O
an	O
acquired	O
complete	B-Architecture
heart	I-Architecture
block	I-Architecture
due	O
to	O
idiopathic	O
fibrosis	O
and	O
calcification	O
of	O
the	O
electrical	B-Algorithm
conduction	I-Algorithm
system	I-Algorithm
of	I-Algorithm
the	I-Algorithm
heart	I-Algorithm
.	O
</s>
<s>
Lev	B-Algorithm
's	I-Algorithm
disease	I-Algorithm
is	O
most	O
commonly	O
seen	O
in	O
the	O
elderly	O
,	O
and	O
is	O
often	O
described	O
as	O
senile	O
degeneration	O
of	O
the	O
conduction	B-Algorithm
system	I-Algorithm
.	O
</s>
<s>
Stokes	B-Algorithm
–	I-Algorithm
Adams	I-Algorithm
attacks	I-Algorithm
can	O
be	O
precipitated	O
by	O
this	O
condition	O
.	O
</s>
