What could be the possible cause of extremely low diastolic pressure with normal systolic in a diabetic patient under treatment with IVF, huminsulin 30:70, inj.dopamine 30ml/hr for correction of hypotension(70/50mm of hg) and inj piperacilin tazobactum. Chest X Ray revealed multiple consolidated/fibrosed patches ECG s/o cardiac failure, pt is also having oral candidiasis JVP raised, nebulised by duolin tds bcoz spo2 was 78-84% Everytime I checked his BP I found variability in systolic and diastolic audible beyond 20.

Give opinions.