You are posted as an EMO on duty. You receive a call at 11:30 PM, regarding an unconscious patient who arrives in an ambulance after 15 minutes. On assessment, you barely feel the radial pulse. No evidence of trauma noted. SBP is 58 mm Hg. You note the following finding while ECG is carried out. Patient had the following USG film . Which electrolyte abnormality is likely to cause the above clinical scenario?