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The importance of electrodes are

• artifact and interfere

• clean tracing.

• angles and planes.

• needed to transmit the impulses,

P Wave:

• SA Nodes contracts

  Both atria contracts

• Impulses reach the av node 0.10 delay allows

• Repolarization or recovery of the ventricles

• Impulses hit av bundle branch off into two bundles down front of heart into purkinje fibers

QRS

• Repolarization or recovery of the ventricles

• Impulses hit av bundle branch off into two bundles down front of heart into purkinje fibers

• SA Nodes contracts

  Both atria contracts

• Impulses reach the av node 0.10 delay allows atria

V1

• LEFT side of the sternum, directly across from V1 at the FOURTH intercostal space

• LEFT side of the chest, FIFTH intercostal space, midclavicular line

• RIGHT side of the sternum at the FOURTH intercostal space

• LEFT side of the chest, FIFTH intercostal space, midaxillary line

V3

• LEFT side of the chest, FIFTH intercostal space, midaxillary line

• RIGHT side of the sternum at the FOURTH intercostal space

• LEFT side of the chest, FIFTH intercostal space, anterior axillary line

• LEFT side of the chest, midway between V2 and V4

V4

• LEFT side of the chest, FIFTH intercostal space, midclavicular line

• LEFT side of the chest, midway between V2 and V4

• LEFT side of the chest, FIFTH intercostal space, midaxillary line

• LEFT side of the sternum, directly across from V1 at the FOURTH intercostal space

V5

• LEFT side of the chest, FIFTH intercostal space, anterior axillary line

• LEFT side of the chest, FIFTH intercostal space, midaxillary line

• LEFT side of the chest, FIFTH intercostal space, midclavicular line

• LEFT side of the sternum, directly across from V1 at the FOURTH intercostal space

V6

• LEFT side of the chest, FIFTH intercostal space, midclavicular line

• LEFT side of the chest, FIFTH intercostal space, anterior axillary line

• LEFT side of the chest, FIFTH intercostal space, midaxillary line

• LEFT side of the sternum, directly across from V1 at the FOURTH intercostal space

What do the letters EKG stand for?

• Electrocardiograph
• Electromagneticgraph
• Electrocardiogram 
• Electrolytes

An electrocardiogram measures what?

• The amount of pressure exerted on blood vessels.
• The electrical activity of the heart.
• How many times the heart contracts over time.
• The body's temperature caused by friction of blood in vessel.