 [ Symptoms ] my younger brother age 32 died in sleep no sign of struggle except foam like saliva pm sugest congestive heart failure there was no medical history of heart problem except mild hypertension he was serving in fire service and physically active was the death due to congestive heart failure and if so what might be the reasons [ Disease ] low blood pressure can result in reduced blood flow and circulation into the brain with poor brain function the usual symptom of dangerously low blood pressure hypotension is a depressed level of consciousness—someone acting sleepy or “out of it ” hallucinations are not a “typical” symptom of low blood pressure however i would not rule it out as a possibility in rare cases it would be important to look for something else causing both the low blood pressure and the hallucinations like a toxic drug effect or dehydration causing delirium in an older person