1 MCQs in Medicine for NEET PG
A 62-year-old woman with chronic kidney disease (eGFR 28 mL/min/1.73m²) and hypertension is admitted with palpitations and dyspnea. Her ECG shows a prolonged PR interval of 240 ms, QRS duration of 130 ms, and peaked T waves. Serum potassium is 6.8 mmol/L. Which of the following ECG findings is the earliest and most specific indicator of hyperkalemia in this patient?
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