Electrocardiograms

Question 1

Electrocardiogram?

Answer 1

Measures electrical activity of the heart to detect cardiac problems.

Question 2

Do ECGs detect the charge on the inside or outside of the cells?

Answer 2

Outside.

Question 3

ECG shows how the _________ _____ moves during each heart beat.

Answer 3

Depolarization Wave.

Question 4

Cardiac Arrhythmia?

Answer 4

Extra or skipped heartbeats.

Question 5

Lead 2 connects…

Answer 5

The left leg as positive to the right arm’s negative.

Question 6

Which electrode is used as a neutral lead?

Answer 6

Right Leg.

Question 7

Chest Leads set up to detect…

Answer 7

Any wave of positive charge going toward them.

Question 8

Leads set up in the transverse plane of the heart.

Answer 8

Chest leads.

Question 9

aVR?

Answer 9

Augmented vector right.

Question 10

Where’s the aVR placed?

Answer 10

Right Arm.

Question 11

Where’s the aVL placed?

Answer 11

Left Arm.

Question 12

The aVR and aVL are placed 30 degrees from…..

Answer 12

The Horizontal Line.

Question 13

aVF?

Answer 13

Augmented vector foot.

Question 14

aVR, aVL, and aVF detect ______ deflection going toward them.

Answer 14

Positive.

Question 15

Bipolar limb leads are labeled…

Answer 15

Lead 1
Lead 2
Lead 3

Question 16

How does Lead 1 work?

Answer 16

Use right arm as negative pole and left arm as positive pole. Forming a vector that goes to the right.

Question 17

How does Lead 2 work?

Answer 17

Use right arm as negative pole and left leg as positive pole. Forming a vector that goes to the plus 60 degree mark.

Question 18

How does Lead 3 work?

Answer 18

Use left arm as negative pole and left leg as positive pole. Forming a vector that goes to the plus 120 degree mark.

Question 19

QRS Complex?

Answer 19

Combination of three of the graphical deflections seen on a typical electrocardiogram.

It corresponds to the depolarization of the right and left ventricles of the human heart and contraction of the large ventricular muscles.