The recent ECG shows prolonged QRS complex and tented T wave

A middle aged male is feeling unwell after a recent MI. The recent ECG shows prolonged QRS complex and tented T wave.
Na+=136mmol/l, K+=6.2mmol/l, urea=5mmol/l. What is the most appropriate management?

a. Calcium gluconate
b. Calcium resonium
c. Calcium with vit D supplement
d. Vit D
e. Calcium

A. Calcium gluconate. [ECG change of prolonged QRS complex and tented T wave are suggestive of hyperkalaemia which is further supported by K+ level of
6.2 mmol/l. So to protect the heart from arrhythmia calcium gluconate should be given].