An electrocardiogram is a picture of the electrical conduction of the heart. By examining changes from normal on the ECG, clinicians can identify a multitude of cardiac disease processes. There are ...

The rhythm is either sinus rhythm or not sinus rhythm. Sinus rhythm refers to the origination of the electrical activity coming from the sinus node — also known as the sinoatrial node, or SA node.

The Internet is rich in cardiology resources. Below you will find my top choices, including heart sounds, self-quizzes, and electrocardiogram (ECG) tutorials. The University of Utah's ECG learner is ...