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 ...

The ECG findings presented as normal in athletes were established by an international consensus panel of ... The QRS rate for junctional rhythms is typically less than 100 beats/min, and the QRS ...

If the QRS complex is upright (positive) in both lead I and lead aVF, then the axis is normal. The image below demonstrates this example, with the electrical vector heading towards the positive of ...