This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Electrocardiography, Subject name: Medicine
ECG finding of Hyperkalemia: 
Select and explain. 
A. T wave inversion, B. ST depression, C. P pulmonale, D. Wide QRS complex
D: Wide QRS complex
Answer: D: Wide QRS complex 
Explanation: Ans.(d) Wide QRS complexRef: Harrison 19th ed. / 310ECG Findings of Hyperkalemia* The first ECG finding in hyperkalemia is tall tented T waves followed by slowing of depolarization of heart.* This results in prolonged PR interval with QRS widening.* Subsequently the P waves start becoming smaller.* Sine wave pattern leading to ventricular fibrillation/ diastolic arrest of heart.