For example, the normal QRS complex in lead V1 does not contain a Q wave — only a R wave and S wave — but the combination of the R wave and S wave is still referred to as the QRS complex for ...

The ability to identify an abnormality on the 12-lead ECG, suggestive of underlying ... elevation combined with T wave inversion in leads V1–V4 in black/African athletes. These common training-related ...

Poor R wave progression refers to the absence of the normal increase in size of the R wave in the precordial leads when advancing from lead V1 to V6. In lead V1, the R wave should be small.