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Nursing:
doi: 10.1097/01.NURSE.0000360247.43995.76
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Too fast, too slow, too ugly: Dysrhythmias that every nurse should recognize

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Too fast, too slow, too ugly: Dysrhythmias that every nurse should recognize

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Too fast, too slow, too ugly: Dysrhythmias that every nurse should recognize

GENERAL PURPOSE To provide nurses with an overview of common dysrhythmias. LEARNING OBJECTIVES After reading the preceding article and taking this test, you should be able to: 1. Identify components of the ECG. 2. Recognize selected dysrhythmias. 3. Identify nursing implications for selected dysrhythmias.

1. About what percentage of total CO flows passively from the atria to the ventricles?

a. 25%

b. 40%

c. 55%

d. 70%

2. The right ventricle pumps blood into the

a. pulmonary artery.

b. right atrium.

c. aorta.

d. left atrium.

3. How many impulses per minute are normally generated by the SA node?

a. 0 to 30

b. 40 to 50

c. 60 to 100

d. 110 to 150

4. What does the P wave represent?

a. atrial depolarization

b. atrial repolarization

c. ventricular repolarization

d. ventricular depolarization

5. What is the normal duration of the QRS complex?

a. 0.01 to 0.02 second

b. 0.03 to 0.05 second

c. 0.06 to 0.10 second

d. 0.12 to 0.20 second

6. What does the T wave represent?

a. atrial repolarization

b. ventricular repolarization

c. ventricular depolarization

d. atrial depolarization

7. How long is a normal PR interval?

a. 0.01 to 0.04 second

b. 0.05 to 0.09 second

c. 0.10 to 0.11 second

d. 0.12 to 0.20 second

8. Which part of the ECG varies with heart rate?

a. QT interval

b. ST segment

c. PR interval

d. QRS duration

9. What does each small box on the vertical axis of ECG paper represent?

a. 1 mm

b. 5 mm

c. 0.04 second

d. 0.20 second

10. An inverted P wave most likely indicates that

a. the impulse originates in the SA node.

b. atrial kick is lost.

c. the impulse originates in the AV junction.

d. ventricular depolarization is occurring.

11. Signs or symptoms of decreased CO due to SVT include

a. hypertension.

b. confusion.

c. polyuria.

d. eupnea.

12. Which is the first I.V. drug used to treat most forms of stable narrow-complex SVT?

a. magnesium

b. amiodarone

c. atropine

d. adenosine

13. Diltiazem is classified as a(n)

a. beta-blocker.

b. angiotensin-converting enzyme inhibitor.

c. diuretic.

d. calcium channel blocker.

14. Which intervention is appropriate for a patient in VF?

a. vagal maneuvers

b. I.V. adenosine

c. CPR

d. I.V. atropine

15. Which intervention is appropriate for VT in a hemodynamically stable patient?

a. CPR

b. I.V. amiodarone

c. defibrillation

d. I.V. atropine

16. Causes of sinus bradycardia include

a. hyperthyroidism.

b. fever.

c. hypoglycemia.

d. anxiety.

17. The I.V. drug of choice for most patients with symptomatic bradycardia is

a. adenosine.

b. diltiazem.

c. metoprolol.

d. atropine.

18. Which statement is correct about AV dissociation?

a. It's also known as second-degree heart block.

b. There are no visible P waves.

c. P waves have no consistent relationship with QRS complexes.

d. It's a benign rhythm.

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