Electrocardiography is a tool of medicine that its function is to record the electrical activity or electrical that occurs in the heart. The results can be seen at elektrodiagram. Usually used in diseases related to the function of the heart. Electrocardiogram (ECG) is a graph which is created by a elektrokardiograf, which record the heart's electrical activity within a specified time. Its name consists of several different parts: electro, because it is related to electronics, cardio, Greece said to heart, grams, a Greece that root meaning "to write". Analysis of the wave vector and the normal depolarisasi and repolarisasi produce important diagnostic information.
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