Philips M3500B manual Precordial Lead Electrode Placement, Lead ECG Lead Formation

Applying Monitoring Electrodes

Figure 4-2 Precordial Lead Electrode Placement

				Electrode		Location
				V1	C1	forth intercostal space, at right sternal
						margin
				V2	C2	forth intercostal space, at left sternal
1	2					margin
	3	5		V3	C3	midway between V2/C2 and V4/C4
	4		6
				V4	C4	fifth intercostal space, at left midclav-
						icular line
				V5	C5	same level as V4/C4, on anterior axil-
						lary line
				V6	C6	same level as V4/C4, at left mid axil-
						lary line

Table 4-2 5-Lead ECG Lead Formation

Lead				Lead Formation
I	LA - RA
II	LL - RA
III	LL - LA
aVR	RA -		LA + LL
				2
aVF	LL -	RA + LA
				2
aVL	LA -	RA + LL
				2
Vx (or Cx)			RA + LA + LL
	V/C -
where x = 1-6				3

4-4 Monitoring the ECG