Asystole is the most serious form of cardiac arrest. It happens when the heart stops beating and there is no more electrical activity. It is sometimes called "flat-line" or "flat-lining" because 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 ...

Sometimes, an abnormal EKG reading is a normal variation in a person’s heart rhythm. In other cases, it may be due to an underlying heart condition or a reaction to medication. An electrocardiogram ...