<s>
Ventricular	B-Algorithm
flutter	I-Algorithm
is	O
an	O
arrhythmia	B-Application
,	O
more	O
specifically	O
a	O
tachycardia	B-Application
affecting	O
the	O
ventricles	O
with	O
a	O
rate	O
over	O
250-350	O
beats/min	O
,	O
and	O
one	O
of	O
the	O
most	O
indiscernible	O
.	O
</s>
<s>
It	O
is	O
characterized	O
on	O
the	O
ECG	B-Application
by	O
a	O
sinusoidal	O
waveform	O
without	O
clear	O
definition	O
of	O
the	O
QRS	O
and	O
T	O
waves	O
.	O
</s>
<s>
It	O
has	O
been	O
considered	O
as	O
a	O
possible	O
transition	O
stage	O
between	O
ventricular	B-Application
tachycardia	I-Application
and	O
fibrillation	O
,	O
and	O
is	O
a	O
critically	O
unstable	O
arrhythmia	B-Application
that	O
can	O
result	O
in	O
sudden	O
cardiac	O
death	O
.	O
</s>
<s>
It	O
can	O
be	O
induced	O
by	O
programmed	B-Algorithm
electrical	I-Algorithm
stimulation	I-Algorithm
.	O
</s>
