ECG Blog #396 — Why the Flat Line?
Ken Grauer, MD
SEPTEMBER 22, 2023
Note also that the P wave is negative in standard lead II in Figure-1 ( as well as in leads III and aVF, which are the other 2 inferior leads ). It is well to remember that IF the P wave in lead II is negative — then by definition — You do not have sinus rhythm ( unless there is lead misplacement or dextrocardia ).
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