Systematic Approach to ECG Assessment

Rate Is it normal (60–100), fast (> 100), or slow (< 60)?
Rhythm Is it regular, irregular?
P waves Are they present? Are they 1:1 with the QRS?
PRI Is it normal (0.12–0.2 sec)? Does it remain consistent?
QRS Is it normal (0.06–0.10 sec) or is it wide (> 0.10 sec)?
Extra Are there any extra or abnormal complexes?