With the alarming rise in heart problems in the recent times, wouldn't it be a great deal to have something that could keep us updated and warn us, in case there was any problem with the heart? Oh, but there is. It's called an Electrocardiogram or EKG (also as ECG). What does an EKG do? An EKG measures the abnormal activities that might take place in the heart and thereby helps to warn us if there are any life-threatening conditions that have been afflicted.