What is the best possible treatment?

A 61year man was found with K+=7.5 and ECG with prolong QRS complex.

What is the best possible treatment?
A . IV calcium gluconate
B . Dialysis
C . Loop diuretics
D . Salbutamol nebulizer
E . IV insulin and dextrose

Answer: A

Explanation:

In this high level of potassium, we have to shift this potassium into cells to red level and save heart from arrest or life threatening arrhythmia. For keep the heart safe option of first choice in emergency is IV calcium gluconate! However, it does not shift or reduce potassium level but protects heart from buy time for definitive measure to take place.