Most of the time, you don't think about your heartbeat. It works quietly in the background of your day. But sometimes your ...

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 the ...

An electrocardiogram, also called an ECG or EKG, is a simple and painless test that measures the electrical impulses of your heart to check for signs of heart disease. It's done through small ...

At times it is difficult to distinguish atrial fibrillation from atrial flutter on the ECG. This example shows coarse "fibrillatory waves" in the setting of atrial fibrillation. This are of varying ...

Sarah Mitroff has worn many hats at CNET, including Senior Mobile Editor and Managing Editor of Health and Wellness. Currently, she is a freelance editor. Throughout her career, she's written about ...

Arrhythmias are irregularities in the heart’s rhythm, such as beating too fast, too slow, or erratically. While some are harmless, others can lead to organ damage or be life threatening. Various ...

ECG and EKG are different abbreviations for the same test, called an electrocardiogram. This test measures how electricity is functioning in a person’s heart. People may also refer to it as an ...

A sinus arrhythmia refers to a problem with the sinus node of the heart. This controls the rhythm of the heart and can be fast (sinus tachycardia) or slow (sinus bradycardia). This article looks at ...