|
| 1 | You have attached the ECG machine to a 61-year-old novelist who, during an argument with her editor, began having "chest pain." To assess the ventricular electrical activity of the heart you should assess the: |
 | A) | QT intervals |
| B) | P waves |
| C) | QRS complexes |
| D) | T waves |
|
| 2 | The QRS complex is the waveform: |
| A) | that precedes the P wave |
| B) | immediately follows the PR interval |
| C) | that occurs concurrently with the ST segment |
| D) | follows the T wave |
|
| 3 | The starting point of the QRS complex is where the |
| A) | first wave of the complex starts to move away from the baseline |
| B) | first wave of the complex levels off with the baseline |
| C) | second wave of the complex starts to move away from the baseline |
| D) | Q wave begins to move in a positive direction away from the baseline |
|
| 4 | The QRS complex ends at the point where the last wave of the complex: |
| A) | reaches it's most negative point |
| B) | starts to flatten as it levels off with the baseline |
| C) | starts to flatten at, above, or below the baseline |
| D) | dips down below the baseline |
|
| 5 | You are analyzing the QRS complexes in an ECG tracing. You determine the duration is 0.14 seconds. These QRS complexes are: |
| A) | of normal duration |
| B) | wider than normal |
| C) | narrower than normal |
| D) | of lower amplitude |
|
| 6 | The Q wave: |
| A) | is the first positive deflection from the baseline following the P wave |
| B) | is always present |
| C) | normally has an amplitude which is less than 25% of the amplitude of the R wave in that lead |
| D) | the second portion of the QRS complex |
|
| 7 | The first positive, triangular deflection in the QRS complex is the: |
| A) | R wave |
| B) | Q wave |
| C) | S wave |
| D) | ST segment |
|
| 8 | The S wave is the first negative deflection: |
| A) | following the PR segment |
| B) | that extends below the baseline in the QRS complex following the R wave |
| C) | that extends above the baseline in the QRS complex following the P wave |
| D) | following the ST segment |
|
| 9 | You are assessing the QRS complexes of an ECG tracing. You note the R wave is absent. For this reason it is called the: |
| A) | RS complex |
| B) | Qs wave |
| C) | qS wave |
| D) | QS complex |
|
| 10 | QRS waveforms less than ___ mm amplitude are denoted with a small case letter. |
| A) | 1 |
| B) | 3 |
| C) | 5 |
| D) | 10 |
|
| 11 | In leads aVR and V1 to V3, the QRS complex is usually: |
| A) | biphasic |
| B) | negative or inverted |
| C) | positive or upright |
| D) | all of the above |
|
| 12 | The QRS complexes should appear upright and narrow if: |
| A) | the rhythm is initiated from the SA node, atria, or AV junction |
| B) | conduction has progressed normally from the bundle of His, through the right and left bundle branches, and through the Purkinje network |
| C) | normal depolarization of the ventricles has occurred |
| D) | all of the above |
|
| 13 | Very tall QRS complexes are usually seen with: |
| A) | abnormal depolarization of the ventricles |
| B) | pleural effusion |
| C) | hyperthyroid patients |
| D) | hypertrophy of one or both ventricles |
|
| 14 | QRS complexes seen in obese patients may be: |
| A) | low-voltage |
| B) | wider than normal |
| C) | very tall |
| D) | biphasic |
|
| 15 | The key characteristic seen with ventricular dysrhythmias is: |
| A) | an absence of P waves |
| B) | wide QRS complexes |
| C) | T waves that deflect in the same direction as the R waves |
| D) | high amplitude R waves |
|
| 16 | Idioventricular rhythm has a characteristic rate of _________beats per minute. |
| A) | 20 to 40 |
| B) | 40 to 60 |
| C) | 60 to 100 |
| D) | 100 to 250 |
|
| 17 | The QRS complexes are much bigger than the P waves because depolarization of the ventricles involves considerably larger muscle mass than depolarization of the atria. |
| A) | True |
| B) | False |
|
| 18 | The QRS complex typically looks wider than the other parts of the ECG because the ventricles depolarize more slowly. |
| A) | True |
| B) | False |
|
| 19 | The duration of the QRS complex is measured from the beginning of the Q wave (or the beginning of the R wave if the Q is not present) to the end of the S wave. |
| A) | True |
| B) | False |
|
| 20 | The normal amplitude of the QRS complexes is 5 to 30 mm in all leads. |
| A) | True |
| B) | False |
|
| 21 | The deflection of the Q wave is always negative. |
| A) | True |
| B) | False |
|
| 22 | The point at which the QRS complex meets the ST segment is called the J point. |
| A) | True |
| B) | False |
|
| 23 | There can be more than one Q wave, R wave and S wave in the QRS complex. |
| A) | True |
| B) | False |
|
| 24 | An ectopic pacemaker in the bundle branches, Purkinje network, or ventricular myocardium is the only cause of abnormal QRS complexes. |
| A) | True |
| B) | False |
|
| 25 | Ventricular tachycardia occurs when there are three or more PVCs in a row. |
| A) | True |
| B) | False |