V Series Operating Instructions 9 - 13
ECG – Arrhythmia Preparation and Lead Placement
CAUTION: Route cables and hoses neatly. Ensure cables, hoses and wires are kept 
away from patient’s neck to avoid strangulation. Keep floors and 
walkways free of cables to reduce risk to hospital personnel, patients 
and visitors.
NOTE: It is recommended that electrode patches be changed at least every 24 to 36 
hours to maintain proper contact with the skin, although some patients may 
require more frequent changing. Do not reapply disposable electrode patches. 
Try to avoid reusing the exact same electrode site during reapplication. If an 
electrode becomes wet with fluid, change the electrode patch.
9.5.3 Lead Placement
9.5.3.1 Description
For lead placement, the computerized arrhythmia algorithm works best when the patient’s R wave is 
significantly larger than the P wave or the T wave. If the R wave is not significantly larger than other 
lower voltage waves on the ECG tracing, the monitor may have some difficulty in identifying the 
appropriate waves. On some patients, electrode patch placement and/or the viewed ECG lead may 
need to be adjusted in order to obtain a significant R wave.
9.5.3.2 Setting Lead Naming Standard
This manual presents lead placement according to the guidelines of the American Heart Association 
(AHA) and the International Electro-Technical Commission (IEC).
LEAD NAMING STANDARDS 
LEAD POSITION AHA IEC
CHEST V C
LEFT LEG LL F
RIGHT LEG RL N
LEFT ARM LA L
RIGHT ARM RA R