Public Safety Training Center
0.04 seconds 4.0 seconds 0.4 seconds 0.2 seconds
MCL1 V1 aVR V5
V1 V4 aVR V2
100-160 60-100 40-60 20-40
V1 MCL1 aVR V6
RA LA RL LL
flipped T waves electrolyte imbalance left bundle branch block first degree AV heart block
1 mV = 1 cm 1 Volt = 1 mm 1 mA = 10 cm 1 mV = 1 mm
Lead I Lead II MCL1 aVL
protects the patient from electrocution helps to remove electrical interference helps to keep the patient from moving is attached to the left leg
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