The Cardia /Heart keep pumping continuously which is responsible for our living life. This can also becomes weak in case of DM, Hypertension, Hormonal sickness, Drug overusage, Poisoning, Alcohol  drinking, Smoking, Accidents, Nacl /Salt, NaHCO3 will land up  to  all of us including Doctors  & Patients. At the time of an emergency, it may results in the death. What makes heart more weak?

Which thing  is more dangerous out of below : Hyperkalemia Hypernatremia  Hypercalcemia  Hypermagnecemia  Hperphosphatemia  Hyperglycemia Hypertension  Or som etimes in emergencies without waiting  for biochemical reports only Potassium (K +) given  in limited  dosage. Please share yourvl views.