<s>
A	O
transesophageal	B-Algorithm
echocardiogram	I-Algorithm
,	O
or	O
TEE	O
(	O
TOE	O
in	O
the	O
United	O
Kingdom	O
and	O
other	O
countries	O
such	O
as	O
Australia	O
and	O
New	O
Zealand	O
,	O
reflecting	O
the	O
British	O
English	O
spelling	O
transoesophageal	O
)	O
,	O
is	O
an	O
alternative	O
way	O
to	O
perform	O
an	O
echocardiogram	B-Application
.	O
</s>
<s>
It	O
has	O
several	O
advantages	O
and	O
some	O
disadvantages	O
compared	O
with	O
a	O
transthoracic	B-Algorithm
echocardiogram	I-Algorithm
(	O
TTE	O
)	O
.	O
</s>
<s>
Performing	O
an	O
esophagogastroduodenoscopy	B-Application
(	O
EGD	O
)	O
beforehand	O
may	O
be	O
necessary	O
to	O
visualize	O
the	O
anatomy	O
for	O
safety	O
,	O
which	O
exposes	O
the	O
patient	O
to	O
a	O
second	O
procedure	O
.	O
</s>
<s>
Specialty	O
medicine	O
professional	O
organizations	O
recommend	O
against	O
using	O
transesophageal	B-Algorithm
echocardiography	I-Algorithm
to	O
detect	O
cardiac	O
sources	O
of	O
embolization	O
after	O
a	O
patient	O
's	O
health	O
care	O
provider	O
has	O
identified	O
a	O
source	O
of	O
embolization	O
and	O
if	O
that	O
person	O
would	O
not	O
change	O
a	O
patient	O
's	O
management	O
as	O
a	O
result	O
of	O
getting	O
more	O
information	O
.	O
</s>
<s>
Such	O
organizations	O
further	O
recommend	O
that	O
doctors	O
and	O
patients	O
should	O
avoid	O
seeking	O
transesophageal	B-Algorithm
echocardiography	I-Algorithm
only	O
for	O
the	O
sake	O
of	O
protocol-driven	O
testing	O
and	O
to	O
agree	O
to	O
the	O
test	O
only	O
if	O
it	O
is	O
right	O
for	O
the	O
individual	O
patient	O
.	O
</s>
<s>
TEE	O
probes	O
are	O
similar	O
in	O
style	O
to	O
those	O
used	O
for	O
esophagogastroduodenoscopy	B-Application
except	O
the	O
probe	O
contains	O
an	O
ultrasound	O
crystal	O
rather	O
than	O
a	O
visual	O
camera	O
.	O
</s>
<s>
The	O
transesophageal	B-Algorithm
echocardiogram	I-Algorithm
was	O
first	O
invented	O
by	O
Dr.	O
Leon	O
Frazin	O
in	O
1974	O
while	O
working	O
at	O
the	O
Loyola	O
University	O
Stritch	O
School	O
of	O
Medicine	O
,	O
Maywood	O
,	O
and	O
Veterans	O
Administration	O
Hospital	O
,	O
Hines	O
,	O
Illinois	O
.	O
</s>
