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 ...

and the QRS axis is normal. The causes of LAD are listed below. Note that the first three account for almost 90% of ECG tracings with LAD. If the QRS is predominantly negative in lead I and ...

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 ...

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, ...