Complete the following ECG criteria for first-degree AV block:

Name: Complete the following ECG criteria for first-degree AV block:
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\begin{array} { | l | l | } \hline ext { Rhythen } & ext { Repular. } \\hline ext { Rate } & \begin{array} { l } ext { Usually within nomal rarne, but depends } \ ext { on underlying rhythun. }\end{array} \\hline ext { P waves } & \begin{array} { l } ext { Norrel in size and shape; one positive } \ ext { (upright) P wave before each QRS. }\end{array} \\hline ext { PR interval } & \begin{array} { l } ext { Prolonged (i.e, rmore thar } 0.20 ext { second) } \ ext { but constart. }\end{array} \\hline ext { QRS duration } & \begin{array} { l } ext { Usually 0.11 second or less urless } \ ext { abnormally conducted }\end{array} \\hline\end{array}

Complete the Following ECG Criteria for First-Degree AV Block