Normal Interval Values.ppt - Normal Interval Values These...

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Normal Interval ValuesThese are Normal Interval Values :1- RR Interval.It is distance b/w two successive R- waves.RR interval indicate the ventricle depolarizationrhytmically.2- PP Interval.It is the distance b/w two successive P- waves.Equal intervals in next successive stagesindicate rhytmical depolarization of atrium.
3- PR Interval.This is interval from the onset of P to that of QRScomplex.The more accurate term of PR interval is PQ interval.During it the cardiac impulse travels from S.A node toventricles.Its duration ranges b/w 0.12 to 0.20 or even 0.22 sec.Longer interval of PR show impaired conduction throughthe bundle, e.g, During Rheumatic fever.Variable PR interval in successive stages indicate A.Vdissociation which indicate that ventricles beat withoutinfluence of S.A node.
4- QRS interval.It measure the total ventricular depolarization time.It is measured from the onset of Q- wave to end of S-wave.

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