A nurse is reviewing a client’s cardiac rhythm strips and notes a constant P-R interval of 0.35 seconds.
Which of the following dysrhythmias is the client displaying?
Atrial fibrillation.
Complete heart block.
First-degree atrioventricular block.
Premature atrial complexes.
The Correct Answer is C
This is because the PR interval is longer than normal, which indicates a delay in the conduction of electrical impulses from the atria to the ventricles through the AV node. A normal PR interval is 0.12 to 0.2 seconds, or 3 to 5 small squares on the EKG strip. In this case, the PR interval is 0.35 seconds, which is more than 5 small squares.
Choice A is wrong because atrial fibrillation is a type of arrhythmia where the atria beat irregularly and rapidly, producing chaotic and variable P waves and an irregular ventricular response.
There is no constant PR interval in atrial fibrillation.
Choice B is wrong because complete heart block is a type of arrhythmia where there is no conduction of electrical impulses from the atria to the ventricles, resulting in independent and dissociated atrial and ventricular rhythms.
There are no consistent P waves or PR intervals in complete heart block.
Choice D is wrong because premature atrial complexes are extra beats that originate from the atria and interrupt the normal sinus rhythm.
They produce abnormal P waves that are different from the sinus P waves, and may have a shorter or longer PR interval depending on the timing of the impulse.
However, they do not cause a constant prolongation of the PR interval.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A client who is ambulatory and receiving oxygen should be evacuated first during a fire because they are at risk of fire and explosion from the oxygen source. The nurse should instruct the staff to turn off the oxygen supply, remove the oxygen device from the client, and assist them to walk out of the building using the nearest exit.
Choice B is wrong because a client who uses a wheelchair and is confused is not in immediate danger from the fire. They can be evacuated using a swing carry or an extremity carry by two staff members after the clients who are more vulnerable are evacuated.
Choice C is wrong because a client who is bedridden and wears a hearing aid is not in immediate danger from the fire. They can be evacuated using a cradle drop by one staff member after the clients who are more vulnerable are evacuated.
Choice D is wrong because a client who has a fracture and is in balance suspension traction is not in immediate danger from the fire. They can be evacuated using a special device such as a sked or a sled by two or more staff members after the clients who are more vulnerable are evacuated.
Correct Answer is C
Explanation
According to the flashcards from Quizlet, a nurse should monitor a client who is at 33 weeks of gestation following an amniocentesis for contractions, as they are a sign of preterm labor and possible uterine rupture. An amniocentesis is a procedure that involves inserting a needle into the amniotic sac to obtain a sample of amniotic fluid for testing. It can cause complications such as bleeding, infection, leakage of fluid, and injury to the fetus or placenta.
Choice A is wrong because it is not a common complication of amniocentesis.
Epigastric pain is more likely to be associated with preeclampsia, a condition that causes high blood pressure and proteinuria in pregnancy. Epigastric pain can indicate severe preeclampsia or HELLP syndrome (hemolysis, elevated liver enzymes, low platelets), which are life- threatening complications that require immediate medical attention.
Choice B is wrong because it is not a direct result of amniocentesis.
Hypertension can occur in pregnancy due to various factors, such as chronic hypertension, gestational hypertension, preeclampsia, or eclampsia. Hypertension can increase the risk of complications such as placental abruption, fetal growth restriction, preterm birth, and maternal stroke.
Choice D is wrong because it is not a typical complication of amniocentesis.
Vomiting can occur in pregnancy due to various causes, such as morning sickness, gastroenteritis, food poisoning, or hyperemesis gravidarum. Vomiting can lead to dehydration, electrolyte imbalance, weight loss, and malnutrition if not treated properly.
Some normal ranges that are relevant for this question are:
- The normal gestational age for delivery is between 37 and 42 weeks.
A baby born before 37 weeks is considered preterm and may have complications such as respiratory distress syndrome, bleeding in the brain, infection, or low blood sugar.
- The normal fetal heart rate is between 110 and 160 beats per minute.
A fetal heart rate below 110 or above 160 can indicate fetal distress or hypoxia.
- The normal amniotic fluid index (AFI) is between 8 and 18 cm.
An AFI below 5 cm is considered oligohydramnios and can indicate fetal growth restriction, kidney problems, or rupture of membranes.
An AFI above 24 cm is considered polyhydramnios and can indicate fetal anomalies, diabetes mellitus, or Rh incompatibility.
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