A 4-year-old child with a history of congenital heart defects has recently undergone surgical repair for a ventricular septal defect. The child is now in the post-operative recovery unit and is being monitored for complications. Suddenly, the child develops palpitations, dizziness, and a sudden drop in blood pressure. The cardiac monitor shows a rapid, irregular rhythm. What is the most likely cause?
Hyperglycemia; Administer insulin to reduce blood sugar levelsSupraventricular tachycardia (SVT); Attempt vagal maneuvers and prepare forpossible adenosine administrationHypokalemia; Administer potassium supplementsHyperthermia; Initiate cooling measures immediately