Electrode placement for<unk> ; RL electrode (green), not shown, remains on leg A<unk>  (also called the S5<unk>  is a modified ECG<unk>  used to detect atrial flutter waves when atrial flutter is suspected clinically, based on signs and symptoms, but is not definitely demonstrated on the standard 12<unk>  ECG. In order to create the<unk> , the right arm electrode is moved to the manubrium adjacent to the sternum. Then the left arm electrode is moved to the right, fifth intercostal space adjacent to the sternum. The left leg electrode is placed on the right lower costal margin. The<unk>  is then read as<unk>  I on the ECG and, since in most patients it will be roughly perpendicular to the wave of ventricular depolarization, atrial flutter waves may be more apparent.
Lewis lead
Sybil 
Pubmeth
Metaldehyde
Lewisite
Vinyl chloride
Basilicon
Heptachlor