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Factors aff ecting ECG trace quality
Factors aff ecting ECG trace quality
Monitor Skin
Environment
Electrode
Cables & lead wires
� CMRR (Common Mode Rejection Ratio) used to separate ECG from other signals
LLRA: Second intercostal space lateral right sideLA: Second intercostal space lateral left sideLL: Lower left lateral chest or left legRL: Lower right lateral chest or right legV2: Fourth intercostal space to the left of
the sternum
RA: Second intercostal space lateral right sideLA: Second intercostal space lateral left sideLL: Lower left lateral chest or left leg
RA: Second intercostal space lateral right sideLA: Second intercostal space lateral left sideLL: Lower left lateral chest or left legRL: Lower right lateral chest or right legV1: Fourth intercostal space to the right of the sternum
V2: Fourth intercostal space to the left of the sternumV3: Between V2 and V4V4: Fifth intercostal space along the mid-clavicular lineV5: Fifth intercostal space between V4 and V6V6: Fifth intercostal space along the mid-axillary line