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Delta waves are initial 20 ms (or is it up to 40ms ?) segment of qrs complex... .
It is more of a fusion complex with native normal qrs complex. The leads in which appear , the polarity and magnitude...
complex will be amplified in a sm0oth manner and result in classical high voltage QRS of LVH... has a potential to blunt the high voltage QRS complex.
It may even cause pathological q waves...
even a normal qrs complex . But .none of us know what is the exact reason , why the width of qrs complex in VT swings from narrow to wide.
Factors determining qrs width in VT.
Origin of VT :Septal...
, we look for the relationship of qrs complex on subsequent P wave . Hence the interval between R to P... .
If it is slow the P wave will be well separated from QRS .
If it is fast it will be close to QRS complex...
for some may be normal for another !
If there is no isoelectric line and ST segment blends with qrs complex...
Wide qrs tachycardia has a unique place in clinical electrocardiography .It is a much fancied...
A combination of low voltage qrs and high voltage qrs is a well known marker of dilated cardiomyopathy . classically patients with severe forms of dilated cardiomyopathy show high voltage qrs...
is Monophasic R .
A monophasic , wide QRS complex again indicate VT as monophasic aberrancy is very rare... majority of cases.
Is RS complex absent all of the pericardial leads ?If the answer is yes it is VT... 
stabilised on the screen and there were definite QRS complexes – now they were more regular, slow but regular... a couple of complexes appearing on the screen as the defib analysed the heart rhythm. No compressions...
Wide qrs tachycardia often evoke a OCD like reaction among many cardiologists (Obsessive compulsive disorder). Whenever we are given a strip of wide qrs tachycardia we are compelled to initiate...
for arriving at a diagnosis in all tachy-arrhythmais based only on heart rate and the width of the qrs complex with acceptable accuracy.
(Click over the table for high resolution image )
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