Stock image Refractory Period
The PR Interval Is Age-related, And The PR Interval Should Be Assessed For Abnormalities Based On The Age Of The Person Being Examined.
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The Atrioventricular Junction Area Has Bidirectional Conduction Ability, And The Impulse Can Be Conducted From The Atrium To The Ventricle Or From The Ventricle To The Atrium.
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The Effective Refractory Period Of The Ventricular Muscle Is Equivalent To The Time From The Onset Of QRS To The Peak Of The T Wave On The ECG.
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Because Of The Slow Conduction Of Atrioventricular Node, The PR Interval Of Adult ECG Should Be Greater Than 120ms. This Physiological Phenomenon Is Called Atrioventricular Delay.
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The PR Interval Of An Ecg Includes The Time During Which Supraventricular Impulses Are Transmitted Through The Atrioventricular Node, His Bundle, Bundle Branches, And Terminal Purkinje Fibers.
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Impulse Encounter Effective Refractory Period Will Lead To Conduction Interruption, And Encounter Relative Refractory Period Will Lead To Conduction Delay.
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A 2:1 Left Bundle Branch Block Is Considered When Complete Left Bundle Branch Block Alternates With Normal QRS Complexes And The PR Interval Is Fixed.
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Conduction Disruption Occurs When The Impulse Encounters The Effective Refractory Period Of The Downstream Conduction System During Conduction.
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Conduction Delay Occurs When The Impulse Encounters A Relative Refractory Period Downstream Of The Conduction System.
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