Indicate the ECG Criteria for the Following Dysrhythmias

Essay

Indicate the ECG criteria for the following dysrhythmias:
$\begin{array}{|l|l|l} & \begin{array}{l}\text { Third-Degree AV } \\\text { Block }\end{array} & 2: 1 \text { AV Block } \\\hline \text { Ventricular } & & \\\hline \text { Rhythm } & & \\\hline \text { PR interval } & & \\\hline \text { QRS width } & &\end{array}$