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Look at the diagram and answer the following questions : Describe structure of the same.

Answer» When P wave take place te pacemaker of the heart, i.e, SA node generates the impulse. This impulse spreads over atrial during P wave.
QRS is a complex, where Q and S are small downward deflections while R is large upward deflection. The entire period of QRS is the venticular depolarization. At R the ventricles show forceful systole, thus the wave shows stronger upward deflection.


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