ECG Tracing

Question 1

Sequential process of depolarization and repolarization of myocardial cells

Answer 1

ECG

Question 2

Instrument used to record the electrical impulse of the heart

Answer 2

Electrocardiograph

Question 3

Record of the mechanical tracing of the heart

Answer 3

Electrocardiogram

Question 4

Activation is known as depolarization and relaxation (recovery) is known as

Answer 4

repolarization

Question 5

Can ECG detect heart murmurs?

Answer 5

NO only through auscultation of the heart or echocardiogram

Question 6

Measured in millivolts or how high is the deflection

Answer 6

Amplitude

Question 7

Time to cross one small square is

Answer 7

0.04 seconds

Question 8

Measured along the vertical axis with one large square representing 0.5 mV

Answer 8

Voltage or amplitude

Question 9

Atrial Depolarization

Answer 9

P wave

Question 10

Atrial Repolarization seen on ECG is hidden by the

Answer 10

QRS complex

Question 11

Not always seen on ECG

Answer 11

Q wave (first deflection downward)

Question 12

QRS complex is the

Answer 12

Depolarization of the ventricles

Question 13

First deflection upward

Answer 13

R wave ( early depolarization of the ventricles)

Question 14

Late depolarization of ventricles

Answer 14

S wave

Question 15

Direction of the electrical current produced by the patients heart

Answer 15

Cardiac vector

Question 16

Placing 2 sensors in the body , One positive and one negative leads

Answer 16

Bipolar lead

Question 17

Flow from Right side (-) to the left side (+) same direction as the lead axis of the ECG leads to what type of deflection

Answer 17

Positive large upward deflection

Question 18

When the cardiac current flow is opposite direction as the axis of the ECG lead. What type of deflection ?

Answer 18

Negative downward deflection

Question 19

When the direction is perpendicular or at 90 degree to the lead axis of the ECG

Answer 19

Isoelectric line or Biphasic or equiphasic deflection