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ECG ch2 Test

Enter the letter for the matching Answer
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1.
Duration of a QRS complex
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2.
In leads I and II the right arm is
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3.
Five large boxes each consisting 5 small boxes represents ? on ECG paper
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4.
The amplitude of a waveform is measured in
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5.
Rtae of the AV node
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6.
rate of the ventricles
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7.
The resting membrane potential. During this phase an excess of NA+ is inside and K+ outside the cell. The NA+/K+ pump is activated to move NA+ outside and K+ back into the cell. The heart is polarized during this phase.
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8.
The ability of myocardial cells to shorten in response to an impulse which results in contraction
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9.
The leads that view the inferior surface of the heart
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10.
The plateau phase. During this phase the CA++ slowley enters the cell as K+ continues to leave the cell slowley. It allows cardiac muscle to sustain an increased period of contraction
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11.
The portion of the ECG tracing used to determine the degree of ST segment displacement
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12.
An important electrolye that affects cardiac function
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13.
It represents the spread of the impulse through the AV node, bundle of His, right and left bundle brnaches and the Purkinje fibers. It normally shortens as heart rate increases
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14.
The movement of charged particles across a cell membrane in which the inside of the cell is restored to its negative charge
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15.
When the inside of a cell is more negative then the outside
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16.
Represents atrial depolarazition
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17.
Duration of the QT interval
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18.
This medication will increase the heart rate and force of contraction
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19.
The ability of cardiac muscle cells to respond to an outside stimulus
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20.
The PR interval is considered prolonged if it is more then
A.
millimeters
B.
Repolarazition
C.
40-60
D.
TP or PR segment
E.
Phase 4
F.
Negative
G.
1 second
H.
.20 secs
I.
Phase 2
J.
PR interval
K.
Epinephrine
L.
.10 secs or less
M.
20-40
N.
Excitability
O.
under .38 secs
P.
Polarized state
Q.
II, III, aVF
R.
Contractility
S.
P wave
T.
Potassium
Type the Answer that corresponds to the displayed Question.
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21.
When the AV junction is bypassed by an abnormal pathway the route is called
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22.
Five phase cycle that reflects the difference in the concentration of these charged particles across the cell membrane at any given time
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23.
The cells of the heart that contain contractile filaments are called
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24.
The stimulus that alters the electrical charges across the cell membrane may be electrical mechanical or ?
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25.
The leads that view the anterior surface of the heart
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26.
This phase begins with the downslope of the action potential. The cell rapidly completes repolarazition as K+ quickly flows out of the cell which causes the inside to become more negative NA+ and CA+ channels close stopping the entry of the two.
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27.
It represents the early part of repolarazition of the right and left ventricels
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28.
After the relative refractory period, a weaker then normal stimulus can cause cardiac cells to depolarize during this period. It extends from the end pf phase 3 to the beginning of phase 4
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29.
The measurement of potential energy is
Type the Question that corresponds to the displayed Answer.
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30.
Complex

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