Dubin's Chapter 2

Question 1

Upward or Downward Deflection:

Positive voltage (Depolarization) moving TOWARD a positive electrode?

Answer 1

Upward Deflection

Question 2

Upward or Downward Deflection:

Positive voltage (Depolarization) moving AWAY from a positive electrode?

Answer 2

Downward Deflection

Question 3

Upward or Downward Deflection:

Negative voltage (Repolarization) moving AWAY from a positive electrode?

Answer 3

Upward Deflection

Question 4

Upward or Downward Deflection:

Negative voltage (Repolarization) moving TOWARD a positive electrode?

Answer 4

Downward Deflection

Question 5

Upward Deflections are seen in which (2) directions of charge?

Answer 5

Positive charge toward positive electrode

Negative charge away from positive electrode

Question 6

Downward Deflections are seen in which (2) directions of charge?

Answer 6

Negative charge towards positive electrode

Positive charge away from positive electrode

Question 7

P-Wave represents

Answer 7

depolarization and contraction of both atria

Question 8

Where does depolarization initially occur?

Answer 8

R. atrium to L atrium

Question 9

What charge do myocytes have in resting state?

Answer 9

Interior: neg -
Exterior: pos +

Question 10

QRS represents?

Answer 10

Ventricular depolarization

Question 11

T-Wave represents?

Answer 11

“Rapid” phase of ventricular depolarization

Question 12

ST segment represents?

Answer 12

Plateau of ventricle repolarization

Question 13

QT represents?

Answer 13

ventricular repolarization