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 R wave is large in lead V1. Turn the ECG upside down and you will see ST segment elevation in V1 and a large Q wave which are normal findings of a myocardial infarction. For a detalied review ...

The six precordial leads are called leads V1, V2, V3, V4, V5 and V6. Below is a normal 12-lead ECG tracing. The different parts of the ECG will be described in the following sections. A normal ECG ...

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 ...

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, ...