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Electrocardiogram (ECG or sometimes known as EKG) offers two types of information. It measures the length it takes for electrical waves to travel through the heart and the amount of electrical activity that is generated and passes through the heart muscles. ECG can determine whether the waves are slow, fast or irregular. In the heart, pacemaker cells are specialized cells that produce electricity by rapid change of their electrical charges from positive to negative and vise versa. This elect…