There are only a few sinus rhythm QRS complexes available to examine on this ECG. Using lead V1 an incomplete right bundle branch block is seen. A prolonged QT interval is present that extends all ...

The ability to identify an abnormality on the 12-lead ECG, suggestive of underlying cardiac disease associated with sudden cardiac death (SCD), is based on a sound working knowledge of the normal ECG ...

In addition to changes in the ECG caused by disease, there are a variety of atypical ECG patterns, often called 'normal variants ... early repolarization 3, whereas heart-rate slowing worsens ...

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 goal of ECG interpretation in athletes is to classify the ECG as: (1) ‘normal’—no further evaluation needed or (2) ‘abnormal’—further evaluation needed. Normal ECGs include common, ...