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13.2 Appendix B: Electrode placements and lead calculations

'Extremal' and 'Precordial' rest test recordings: Recordings with Frank arrangement Stress test recordings
I  = L - R
II  = F - R
III  =  F - L
aVR  =  R - (F + L) / 2
aVL  =  L - (F + R) / 2
aVF  =  F - (L + R) / 2
V1  =  C1 - (F + L + R) / 3
V2  =  C2 - (F + L + R) / 3
V3  =  C3 - (F + L + R) / 3
V4  =  C4 - (F + L + R) / 3
V5  =  C5 - (F + L + R) / 3
V6  =  C6 - (F + L + R) / 3		 X = 0.78 *( 0.78*A +0.22*C - I) 
Y = 0.35*M + 0.65*F – H
Z = 0.87 * ( 0.15*A + 0.85*M - 0.30*I - 0.43*E - 0.27*C )		 Leads and calculation are the same as described in the 'Precordial' type.

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