<s>
Right	B-Algorithm
heart	I-Algorithm
strain	I-Algorithm
(	O
also	O
right	B-Algorithm
ventricular	I-Algorithm
strain	I-Algorithm
or	O
RV	B-Algorithm
strain	I-Algorithm
)	O
is	O
a	O
medical	O
finding	O
of	O
right	O
ventricular	O
dysfunction	O
where	O
the	O
heart	O
muscle	O
of	O
the	O
right	O
ventricle	O
(	O
RV	O
)	O
is	O
deformed	O
.	O
</s>
<s>
Right	B-Algorithm
heart	I-Algorithm
strain	I-Algorithm
can	O
be	O
caused	O
by	O
pulmonary	O
hypertension	O
,	O
pulmonary	O
embolism	O
(	O
or	O
PE	O
,	O
which	O
itself	O
can	O
cause	O
pulmonary	O
hypertension	O
)	O
,	O
RV	O
infarction	O
(	O
a	O
heart	O
attack	O
affecting	O
the	O
RV	O
)	O
,	O
chronic	O
lung	O
disease	O
(	O
such	O
as	O
pulmonary	O
fibrosis	O
)	O
,	O
pulmonic	O
stenosis	O
,	O
bronchospasm	O
,	O
and	O
pneumothorax	O
.	O
</s>
<s>
When	O
using	O
an	O
echocardiograph	B-Application
(	O
echo	O
)	O
to	O
visualize	O
the	O
heart	O
,	O
strain	O
can	O
appear	O
with	O
the	O
RV	O
being	O
enlarged	O
and	O
more	O
round	O
than	O
typical	O
.	O
</s>
<s>
An	O
important	O
potential	O
finding	O
with	O
echo	O
is	O
McConnell	B-Algorithm
's	I-Algorithm
sign	I-Algorithm
,	O
where	O
only	O
the	O
RV	O
apex	O
wall	O
contracts	O
;	O
it	O
is	O
specific	O
for	O
right	B-Algorithm
heart	I-Algorithm
strain	I-Algorithm
and	O
typically	O
indicates	O
a	O
large	O
PE	O
.	O
</s>
<s>
On	O
an	O
electrocardiogram	B-Application
(	O
ECG	B-Application
)	O
,	O
there	O
are	O
multiple	O
ways	O
RV	B-Algorithm
strain	I-Algorithm
can	O
be	O
demonstrated	O
.	O
</s>
<s>
A	O
finding	O
of	O
S1Q3T3	B-Algorithm
is	O
an	O
insensitive	O
sign	O
of	O
right	B-Algorithm
heart	I-Algorithm
strain	I-Algorithm
.	O
</s>
<s>
Other	O
EKG	B-Application
signs	O
include	O
a	O
right	B-Algorithm
bundle	I-Algorithm
branch	I-Algorithm
block	I-Algorithm
as	O
well	O
as	O
T	O
wave	O
inversions	O
in	O
the	O
anterior	O
leads	O
,	O
which	O
are	O
"	O
thought	O
to	O
be	O
the	O
consequence	O
of	O
an	O
ischemic	O
phenomenon	O
due	O
to	O
low	O
cardiac	O
output	O
in	O
the	O
context	O
of	O
RV	O
dilation	O
and	O
strain.	O
"	O
</s>
<s>
Aside	O
from	O
echo	O
and	O
ECG	B-Application
,	O
RV	B-Algorithm
strain	I-Algorithm
is	O
visible	O
with	O
a	O
CT	O
scan	O
of	O
the	O
chest	O
and	O
via	O
cardiac	B-Algorithm
magnetic	I-Algorithm
resonance	I-Algorithm
.	O
</s>
