| http://www.w3.org/ns/prov#value | - ECG leads are of two types, chest leads and limb leads, chest leads are 6 abbreviated as V1, V2, V3, V4, V5 and V6, there are 4 limb leads; two for arms, and two for legs, abbreviated as RA , LA, RL and LL. ECG is performed right away without any prior preparation or anesthesia.
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