Any views expressed above are the author's own and do not necessarily reflect the views of WebMD or Medscape. Cite this: ECG Challenge: Did COPD Cause This Man's Irregular Heart Rate?

Wave: A positive or negative deflection from baseline that indicates a specific electrical event. The waves on an ECG include the P wave, Q wave, R wave, S wave, T wave and U wave.

Left ventricular hypertrophy can be diagnosed on ECG with good specificity. When the myocardium is hypertrophied, there is a larger mass of myocardium for electrical activation to pass through ...

Any views expressed above are the author's own and do not necessarily reflect the views of WebMD or Medscape. Cite this: ECG Challenge: What Triggered This AF Patient's Shortness of Breath?

Patients with the Long QT Syndrome type 2 have abnormal cardiac electrical activity, which is diagnosed by an electrocardiogram (ECG) that shows a prolonged QT interval and a notched T wave. Here ...