Q: Even though my doctor told me I am pretty healthy, she ordered an electrocardiogram (ECG) to be done right in her office. Besides a heart attack, what else can ECGs show? A: Cardiac (heart) cells ...

Reentry arrhythmia occurs when electrical signals in the heart deviate from their usual path, creating a loop that causes repeated stimulation and disrupts the heart’s rhythm. Symptoms of reentry ...

Researchers have developed a non-invasive, reusable 'ECG vest' that takes high-resolution images of the heart's electrical activity in five minutes. Combining its data with cardiac MRI scans can ...

Electrophysiology is a branch of medicine concerning the heart’s electrical system. An electrophysiologist tests the electrical activity of the heart and can diagnose and treat a number of conditions.

Scientists have continually been seeking better ways to track the electrical activity of the body's most excitable cells, such as neurons, heart muscle fibers and pancreatic cells. These tiny ...