ECG

V2

4th intercostal space L sideof the sternum

V1

4th intercostal space R side of sternum

V4

5th intercostal space at the mid - clavicle line

The P wave, QRS complex, & T wave

Are the major parts of the cardiac cycle

V5

At the level of 5th intercostal & anterior axillary line

V6

At the level of the 5th intercostal & mid - axillary line

3 standard limb leads

Bipolar

Lead

Electrical activity is recorded between 2 electrodes. Each pair of electrodes

V3

Halfway between V2 & V4

What does each wave represent?

It represents electrical activity in a certain part of the heart

Chest leads

Precordal leads, in front of the chest

Lead III (LA & LL)

Records electrical activity between L arm and L leg

Lead I (RA & LA)

Records electrical activity between R & L arm

Lead II (RA & LL)

Records electrical activity between R arm and L leg

aVR

Records electrical activity from the L arm to the midpoint of the electrodes on the RA & LL

aVF

Records electrical activity from the L leg to the midpoint on the electrodes on the RA & LA

aVR

Records electrical activity from the R arm to the midpoint of the electrodes on the LA & LL

ECG

Records electrical activity of the conduction system

12-ECG

Records heart's electrical activity from 12 different directions

3 augmented limb leads

Unipolar