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 ...

Atrioventricular (AV) dissociation occurs in complete heart block (third-degree ... has normal voltage in these leads, but negative QRS in lead I). Hypokalemia causes U waves in the ECG seen ...

She missed her last two dialysis sessions. Below is her ECG tracing. 1. Normal sinus rhythm with a 1st degree AV block (PR interval is prolonged). 2. A non-specific intraventricular conduction ...