Nokea
Dome and dart P wave in lead V1 in electrocardiogram is suggestive of which of the following?
- A. Dextrocardia
- B. Left atrial ectopic rhythm
- C. Biatrial enlargement
- D. Mitral stenosis
Correct Answer: C
Rationale: The dome and dart P wave morphology is characteristic of biatrial enlargement, often seen in conditions like mitral stenosis and atrial fibrillation.
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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
The MOST common cause of pulmonary hypertension in pediatric patients is
- A. idiopathic pulmonary hypertension
- B. pulmonary venoocclusive disease
- C. left-sided valvular heart disease
- D. chronic obstructive pulmonary disease
Correct Answer: A
Rationale: Idiopathic pulmonary hypertension is a rare but recognized cause of pulmonary hypertension in children.
Regarding insulin administration in diabetics:
- A. Short-acting insulin reaches peak action in 4-6 hours after injection
- B. In a twice daily regimen involving Mixtard 30 or Humulin M3, the bedtime reading is an effect of the long-acting component
- C. A bedtime blood sugar level of 10 mmol/l is unacceptable
- D. Using the same site for injections is a common cause of increasing insulin dosage
Correct Answer: B
Rationale: The bedtime reading in a twice-daily regimen involving Mixtard 30 or Humulin M3 is influenced by the long-acting component, which has a prolonged effect.
A psychiatric referral is warranted in a preschool child with the following:
- A. Night terrors
- B. Separation anxiety
- C. Scared of ghosts
- D. Masturbation
Correct Answer: B
Rationale: Separation anxiety in a preschool child, especially if it is severe and persistent, may warrant a psychiatric referral to assess for anxiety disorders.
When caring for an 11-month-old infant with dehydration and metabolic acidosis, the nurse expects to see which of the following?
- A. A reduced white blood cell count
- B. A decreased platelet count
- C. Shallow respirations
- D. Tachypnea
Correct Answer: D
Rationale: Tachypnea is a compensatory mechanism in metabolic acidosis to help expel excess carbon dioxide and correct the acid-base imbalance.