You have been called to the home of a 62-year-old male who has failed to go to dialysis for the past week and is now unresponsive. After placing him on high-flow oxygen and obtaining a set of vital signs—pulse rate 46 beats/min, respirations 30 breaths/min, blood pressure 242/136 mm Hg, skin pale, cool, and clammy—you perform a physical exam. You observe that the patient's hands and feet have pitting edema, his breath smells strongly of urine, and his skin is covered in a white, dry, and crusty residue. As you place your ECG electrodes, you expect to find:

A) Peaked T waves
B) A third-degree heart block
C) A depressed ST segment with inverted T waves
D) ST segment elevation

Ans: A) Peaked T waves