cause of death in a 22 days baby presented to causualty

baby's mother presented with a complaint that baby has hiccups and a
single convulsions episode of convulsions in upper limbs lasting for
about 3 -5 min, today morning in casualty.

O/E : GC poor, pallor + , tense anterior frontenelle, no cry,
respiration and activity is poor with shallow respiratory, distended
bladder, CRT < 3 sec. sO2 : 56% .

but the unfortunate thing is that the baby died within 2 hrs.

can u please explain the causes of death in this condition and
treatment.

hi