Which of the following are characteristics of atrial fibrillation? Select all that apply
1. The ventricular rhythm is irregular.
2. The QT interval cannot be measured because the T waves are buried in the "f" waves.
3. P waves are replaced by "f waves," which are due to atrial quivering.
4. The PR intervals are measurable.
5. The atrial rate can be calculated by counting the P waves in 6 seconds and multiplying by 10.
Correct
1. The ventricular rhythm is irregular.
2. The QT interval cannot be measured because the T waves are buried in the "f" waves.
3. P waves are replaced by "f waves," which are due to atrial quivering.
Rationale: The ventricular rhythm is irregular. The ventricular rhythm is irregular in atrial fibrillation. The QT interval cannot be measured because the T waves are buried in the "f" waves. Because T waves are buried within the "f' waves, the QT interval cannot be measured. P waves are replaced by "f waves," which are due to atrial quivering. Waves that are seen between R-to-R intervals are called "f" waves and are due to atrial quivering. The PR intervals are measurable. Because there are no P waves, the PR interval cannot be measured. The atrial rate can be calculated by counting the P waves in 6 seconds and multiplying by 10. In atrial fibrillation there are no P waves, therefore the atrial rate cannot be counted.
You might also like to view...
A pregnant client's hemoglobin value is 11 grams/dL in the second trimester. Which factor best explains this finding?
A) Presence of iron-deficiency anemia C) Pregnancy involving multiple gestation B) Greater-than-expected weight gain D) Hemodilution of pregnancy
The nurse has noted some common characteristics in persons with conductive hearing loss, which are (select all that apply):
1. hearing adequately in noisy settings. 2. hearing sounds, but having difficulty understanding speech. 3. hearing aids improve hearing. 4. a history of diabetes mellitus. 5. speaking in a normal volume.
A comprehensive definition of family is that it is a social group with members who share common values, interact over time, and
A) Occupy specific positions B) Participate in religious rituals C) Evolve psychologically over time D) Maintain order and safety
For pruritus, the patient may be treated with which of the following?
A. benzoyl peroxide B. burow solution C. a colloidal bath D. silver nitrate