This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: ECG and Arrhythmia 2, Subject name: Medicine
[{'content': 'The following ECG finding is seen in all except? \nSelect and explain. \nA. Hypothermia, B. Hypercalcemia, C. Hypocalcemia, D. SAH', 'role': 'user'}, {'content': 'Answer: C \nExplanation: ECG shows Osborn waves( J point wave) Osborn wave is a deflection with a dome or hump configuration occurring at the R-ST junction (J point) on the ECG. Causes of Osborn waves: Hypothermia Hypercalcemia Subarachnoid Haemorrhage (SAH) Brain injury Cardiopulmonary arrest Idiopathic ventricular fibrillation Hypocalcemia: Prolongation of the QTc interval because of lengthening of the ST segment, which is directly propoional to the degree of hypocalcemia.', 'role': 'assistant'}]