During the initial newborn assessment, the nurse finds that a newborn's heart rate is irregular. Which intervention should the nurse implement?

Rationale: A. Document the finding in the infant's record: Documentation is necessary for all assessment findings, but an irregular heart rate in a newborn may indicate a potentially serious cardiac issue. Simply recording it without notifying the healthcare provider could delay critical evaluation or intervention. B. Teach the parents about congenital heart defects: Parental education is important, but it is not the immediate priority when a newborn has an irregular heart rate. Immediate assessment and guidance from a healthcare provider take precedence over education. C. Apply oxygen per nasal cannula at 3 L/min: Administering oxygen is only indicated if the infant shows signs of hypoxia or respiratory distress. An irregular heart rate alone does not automatically require supplemental oxygen without further assessment. D. Notify the pediatrician immediately: Immediate notification of the pediatrician is essential because an irregular heart rate may signal arrhythmias, congenital heart defects, or other serious cardiac conditions. Prompt evaluation ensures timely intervention to prevent complications.