The resting electrocardiogram (ECG ... One can either use calculated sums of the amplitudes of QRS complexes of all 12 leads, or the 6 limb leads, or only leads I and II. As noted above, the ...

The ECG findings of dextrocardia include a predominantly negative P wave (when sinus rhythm is present), negative QRS complex, and negative T wave in lead I. This results in a rightward QRS axis.

This term can be confusing, as not all ECG leads contain all three of these waves; yet a “QRS complex” is said to be present regardless. For example, the normal QRS complex in lead V1 does not ...