First-Degree Block
Regular; P to P is regular, 60 to 100 bpm
Regular; R to R is regular, 60 to 100 bpm
P wave before every QRS complex
Unchanged unless aberrant conduction due to premature beat or increased rate
PR: >0.20 sec
QRS: <0.12 sec
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First-Degree Block
Regular; P to P is regular, 60 to 100 bpm
Regular; R to R is regular, 60 to 100 bpm
P wave before every QRS complex
Unchanged unless aberrant conduction due to premature beat or increased rate
PR: >0.20 sec
QRS: <0.12 sec