This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fluid and Electrolyte Treatment of Specific Disorders, Subject name: Pediatrics
[{'content': 'Sine wave in ECG is seen in? \nSelect and explain. \nA. Hyperkalemia, B. Hypokalemia, C. Hypercalcemia, D. Hypocalcemia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: a. Hyperkalemia(Ref: Nelson\'s 20/e p 357-360)Hyperkalemia produces a sequence of changes in ECG:1st ECG finding: Narrowing and peaking (tenting) of the T wavesQFurther elevation of K+ leads to AV conduction disturbances, | P-wave amplitude & widening of QRS intervalSevere hyperkalemia eventually causes with a slow sinusoidal "sine-wave" pattern followed by asystole.', 'role': 'assistant'}]