EKG-Specfic Terms

Question 1

Einthoven’s Triangle

Answer 1

The original model for interpreting EKGs, made up of 3 original limb leads.

Question 2

Artifact

Answer 2

Physical, Electrical, or Magnetic interference that alters the EKG tracing.

Question 3

Baseline

Answer 3

An electrically neutral tracing on an EKG (flatline)

Question 4

Depolarization

Answer 4

The loss of polarization as result of sodium influx into the muscle cells that leads to contraction of the muscle.

Question 5

Repolarization

Answer 5

The re-establishment of polarization as a rustle of the moment of sodium out of the cell and potassium influx to replace it. Repolarization resets the cell so that it may contact again when need.

Question 6

Electrocardiograph

Answer 6

A graphic representation of the movement of electricity with the heart.

Question 7

Electrode

Answer 7

The interface between patient and machine, usually a conductive media fixed to the skin with a conductive water-based adhesive.

Question 8

Leads

Answer 8

Wires from the machine that connect to the electrodes designed to measure the electrical impulses of the patient.

Leads are dived into two categories:
• Limb leads: 4bipolar leads that connect to the limbs and view electrical activity in the front of the heart.
• Precordical leads: 6unipolar leads that are placed on the chest from front right and wrapping to the left side of the patients chest.

Question 9

PQRST-Waves/ Cardiac Cycle

Answer 9

The five standard waves of an EKG tracing, each wave is associated to a different electrical event within the heart.