If QRS complex measurement of greater than 0.12 indicates delayed ventricular conduction.
- QRS complex represents ventricular depolarization, It is from beginning of q wave to the end of S wave.
- QRS complex duration is 0.06-0.10 sec = 60-100 m sec =1.5-2.5 small squres
- QRS complex slightly reduced during exercise in response to increased cardiac conduction velocity.
- Deflection of QRS Complex consist of 3 deflection 1) q wave (1st negative deflection) 2) r wave (1st positive deflection) 3) s wave (2nd negative deflection)
- Normal QRS complex conduction has progressed normally from the bundle of His, through the right and left bundle branches, and through the Purkinje network OR Produced by normal depolarization of the ventricles
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