Nokea
While looking through the chart of an infant with a congenital heart defect (CHD) of decreased pulmonary blood flow, the nurse would expect which laboratory finding?
- A. Decreased platelet count
- B. Decreased ferritin level
- C. Respiratory alkalosis
- D. Polycythemia
Correct Answer: D
Rationale: Polycythemia is often seen in infants with congenital heart defects that cause decreased pulmonary blood flow, as the body produces more red blood cells to compensate for low oxygen levels.
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The parents of a 3-month-old ask why their baby will not have an operation to correct a ventricular septal defect (VSD). The nurse's best response is:
- A. It is always helpful to get a second opinion about any serious condition like this.
- B. Your baby's defect is small and will likely close on its own by 1 year of age.
- C. It is common for physicians to wait until an infant develops respiratory distress before they do the surgery.
- D. With a small defect like this, they wait until the child is 10 years old to do the surgery.
Correct Answer: B
Rationale: Most small VSDs close spontaneously within the first year of life.
Sudden death in an athlete immediately after forceful blunt trauma to the chest is most likely
- A. commotio cordis
- B. myocardial infarction
- C. lacerated coronary artery
- D. ruptured cardiac tendineae
Correct Answer: A
Rationale: Commotio cordis occurs due to sudden arrhythmias triggered by chest trauma during a vulnerable phase of the cardiac cycle.
The following statements are true regarding a screening test:
- A. Sensitivity indicates the proportion of true positives
- B. Specificity indicates the proportion of true negatives
- C. Sensitivity is inversely related to specificity
- D. Prevalence affects predictive value
Correct Answer: D
Rationale: Prevalence affects predictive value
In embryology:
- A. Most defects occur with teratogens in the first 2 weeks post-conception
- B. The urachus becomes the median umbilical ligament
- C. The mesonephric duct becomes the male organs
- D. The thyroid develops from the floor of the primitive larynx
Correct Answer: B
Rationale: The urachus becomes the median umbilical ligament. Most defects occur after the first 2 weeks, and the thyroid develops from the floor of the pharynx.
A nurse assesses clients on a medical-surgical unit. Which client should the nurse identify as having the greatest risk for cardiovascular disease?
- A. An 86-year-old man with a history of asthma
- B. A 32-year-old Asian-American man with colorectal cancer
- C. A 45-year-old American Indian woman with diabetes mellitus
- D. A 53-year-old postmenopausal woman who is on hormone therapy
Correct Answer: C
Rationale: Diabetes mellitus is a significant risk factor for cardiovascular disease, and the 45-year-old American Indian woman with diabetes mellitus has the highest risk among the options provided.