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Normal P, QRS & T Axis on an Electrocardiogram (ECG) as Seen in Plateau Specialist Hospital, Jos. Central Nigeria

The use of ECG in making diagnosis of heart diseases is widely accepted in most communities. however, the presence of a very few number of Specialists and health care providers having limited idea on the use of ECG has made it necessary to point out this basic information. It has been said that before one knows an abnormality one has to be conversant with what is normal. Determination of axis of the heart is one of the several uses of ECG tracing while making some diagnosis of heart diseases. The most commonly referred axis of the heart is the QRS axis, this generally gives an idea of the overall left ventricular vector direction. It can easily be determined using the standard limb leads (I, II & III). The P & T axis are less commonly considered. Most ECG machines have in-built interpreters that give all the P, QRS and T axis.