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| 1 | The ECG machine: |
 | A) | is referred to as an electrocardiogram |
| B) | has at least 12 different leads |
| C) | measures and records the heart's mechanical function |
| D) | displays the ECG on a screen or prints it onto graph paper |
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| 2 | Static ECGs: |
| A) | show what has already occurred |
| B) | are displayed on the ECG monitor |
| C) | are more difficult to analyze than are dynamic ECGs |
| D) | reflect what is currently occurring in a person's heart |
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| 3 | The heart's electrical activity is detected by _______________ positioned on the patient's skin. |
| A) | lead wires |
| B) | electrical detectors |
| C) | electrodes |
| D) | magnetic strips |
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| 4 | You are analyzing an ECG tracing, you note that the PR interval extends horizontally across one entire larger square (consisting of five small boxes) of ECG graph paper. This means that the PR interval is ____ seconds in duration. |
| A) | 0.10 |
| B) | 3 |
| C) | 0.20 |
| D) | 0.04 |
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| 5 | On the ECG graph paper ______ larger boxes equal a 3-second interval. |
| A) | ten |
| B) | fifteen |
| C) | twenty |
| D) | thirty |
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| 6 | Each larger square (consisting of five smaller boxes) of the ECG graph paper running vertically represents ___ mm. |
| A) | 1 |
| B) | 0.5 |
| C) | 0.04 |
| D) | 5 |
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| 7 | Which of the following are the normal order ECG waveforms, intervals and segments are seen? |
| A) | PR interval, P wave, QRS complex, T wave and ST segment |
| B) | P wave, QRS complex, PR interval, ST segment and T wave |
| C) | P wave, PR interval, QRS complex, ST segment and T wave |
| D) | T wave, P wave, QRS complex, PR interval and ST segment |
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| 8 | The term ______ means the shape of the various waves on the ECG. |
| A) | amplitude |
| B) | morphology |
| C) | duration |
| D) | isoelectric |
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| 9 | The isoelectric line: |
| A) | is a wavy line any time no electrical activity is occurring |
| B) | represents the depolarized state of the cells |
| C) | can be used as a baseline or reference point to identify changing electrical amplitude |
| D) | only occurs in abnormal ECGs |
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| 10 | Which of the following is true regarding P waves? |
| A) | They are produced by initiation of the impulse in the SA node and their movement through the ventricles. |
| B) | They are characteristically upright and notched waveforms. |
| C) | Their amplitude is 0.5 to 2.5 mm and duration is 0.06 to 0.10 seconds. |
| D) | Normally, not all the P waves are followed by a QRS complex |
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| 11 | The impulse traveling through the His-Purkinje system is seen as a flat line called the: |
| A) | PR interval |
| B) | PR segment |
| C) | J point |
| D) | ST segment |
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| 12 | The PR interval is normally ______ seconds in duration. |
| A) | 0.06 to 0.10 |
| B) | 0.10 to 0.16 |
| C) | 0.12 to 0.20 |
| D) | 0.16 to 0.24 |
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| 13 | The QRS complex: |
| A) | follows the P wave and ST segment |
| B) | is smaller in appearance than the P wave |
| C) | consists of four parts |
| D) | is generally narrow and sharply pointed |
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| 14 | The _________ represents movement of the electrical impulse through the ventricles, causing their contraction. |
| A) | QRS complex |
| B) | PR segment |
| C) | P wave |
| D) | T wave |
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| 15 | The point at which the QRS complex meets the ST segment is called the: |
| A) | isoelectric junction |
| B) | J point. |
| C) | QT point |
| D) | QRS-ST segment junction |
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| 16 | Ventricular repolarization is represented by the: |
| A) | P wave |
| B) | QT interval |
| C) | T wave |
| D) | QS wave |
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| 17 | You are assessing an ECG tracing and notice wide, notched P waves. This indicates: |
| A) | normal initiation and conduction of the impulse through the AV node |
| B) | origination of the impulse from the ventricles |
| C) | a delay in conduction through the AV node |
| D) | dilation of the left atria |
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| 18 | While assessing an ECG tracing you note the PR interval is 0.24 seconds in duration. This indicates: |
| A) | the impulse has originated close to the ventricles |
| B) | there is a delay in conduction through the AV node |
| C) | the presence of preexcitation |
| D) | an abnormal conduction of the electrical impulses through the ventricles |
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| 19 | A wider than normal QRS complex indicates: |
| A) | the impulse has originated from above the ventricles |
| B) | there is a delay in conduction through the AV node |
| C) | there is an enlargement of the ventricular wall |
| D) | there is a delay in conduction through the ventricles |
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| 20 | The limb leads provide information about electrical activity of the heart on the ______ plane. |
| A) | vertical |
| B) | frontal |
| C) | horizontal |
| D) | posterior |
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| 21 | Artifact is markings on the ECG tracing that: |
| A) | indicate the heart is beating chaotically |
| B) | can be caused by such things as the abnormal conduction through the heart's conduction system or enlargement of the chambers. |
| C) | has no relationship to the electrical activity of the heart |
| D) | reveal the presence of damaged myocardium |
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| 22 | A current traveling away from a positive electrode or toward a negative electrode produces a waveform that: |
| A) | points downward |
| B) | is biphasic |
| C) | is positively oriented |
| D) | is flat |
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| 23 | Bipolar leads |
| A) | Include leads V1, V2, V3, V4, V5, and V6. |
| B) | use one positive electrode and a reference point calculated by the ECG machine |
| C) | require two electrodes of opposite polarity (positive and negative) and have a third electrode called a ground |
| D) | are also referred to as precordial leads |
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| 24 | With lead II the positive electrode is positioned on the: |
| A) | right leg |
| B) | left shoulder |
| C) | left leg |
| D) | left side of the chest in the midclavicular line just superior to the nipple |
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| 25 | The modified chest leads are particularly well suited for differentiating between supraventricular and ventricular tachycardia. |
| A) | True |
| B) | False |