The ECG findings presented as normal in athletes were established by an international consensus panel ... In Mobitz type I second-degree AV block, the PR interval progressively lengthens from beat to ...

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 ...

However, the P wave or T wave axis can also be measured ... some shortcuts to quickly determine the axis are outlined below. The normal QRS axis should be between -30 and +90 degrees.

These ECG voltage attenuations are of extracardiac mechanism, and impact the amplitude of QRS complexes, P-waves, and T-waves, occasionally resulting also in shortening of the QRS complex and QT ...